tag:blogger.com,1999:blog-18001253686426542532024-02-21T06:45:47.994+01:00 . . . DE8MSH - THE SHORTWAVE LISTENER STATION . . .DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comBlogger97125tag:blogger.com,1999:blog-1800125368642654253.post-17333477698964576972016-03-28T16:03:00.000+02:002016-04-08T05:45:50.509+02:00A rare guest: Murmansk meteo fax.Hi.<br />
<br />
Yesterday and today I recevied a inverted weather fax on hf. The frequency is about 8444 khz (my YAESU FRG-100 is tuned to 8442kHz/USB). Internet says that this station is located in <a href="http://www.hfunderground.com/wiki/Maritime_Fax_Transmissions" target="_blank">Murmask</a>.<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgaMet6L01Hd4GX8HwkU-ge5kbyrz4W4n07W8xeBSsZ0CGKOcsOKUvEf0MOSPUfwfM_VNo3FKaIqyT_2SxGeOdUxIbbD-64-wrIAwVIGIOERdzOT8C873NX10PkxGu6vZLPuLd40Wqspxd/s1600/20160328_rare_wefax_transmission_8442_7kHz_1349U_USB.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgaMet6L01Hd4GX8HwkU-ge5kbyrz4W4n07W8xeBSsZ0CGKOcsOKUvEf0MOSPUfwfM_VNo3FKaIqyT_2SxGeOdUxIbbD-64-wrIAwVIGIOERdzOT8C873NX10PkxGu6vZLPuLd40Wqspxd/s320/20160328_rare_wefax_transmission_8442_7kHz_1349U_USB.png" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">fldigi/RPi² demodulatin wefax from Murmansk</td><td class="tr-caption" style="text-align: center;"><br /></td><td class="tr-caption" style="text-align: center;"><br /></td></tr>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiluDt5G4iEvyrQejWI0l-4k7js3NwPukZmnPLOVDAC54WviRlu59FsJ268gYzLHXfQVwpgbkLyR4egFZGdN2PxDBzvnt6qp9cHD28CFXytd4W4vgIFKwLgq1Ad3mkJCk9eS1Bkl_huiEaY/s1600/murmanskmap.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="146" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiluDt5G4iEvyrQejWI0l-4k7js3NwPukZmnPLOVDAC54WviRlu59FsJ268gYzLHXfQVwpgbkLyR4egFZGdN2PxDBzvnt6qp9cHD28CFXytd4W4vgIFKwLgq1Ad3mkJCk9eS1Bkl_huiEaY/s320/murmanskmap.png" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Picture inverted</td></tr>
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This fax should be decoded in LSB mode. Then the picture could be in B/W instead of W/B :).DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-17096954858236277652016-03-28T10:03:00.002+02:002016-03-29T15:08:57.953+02:00NDB beacons roundupAnother colour of my life as SWL is to get some nice signals of NDB beacons. NDB stands for 'non directional beacons'. See also <a href="https://en.wikipedia.org/wiki/Non-directional_beacon" target="_blank">Wikipedia</a> for it.<br />
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This is what I get so far:<br />
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<iframe height="480" src="https://www.google.com/maps/d/embed?mid=z-g8iSEFyJuw.kjCESrhD1XyM" width="640"></iframe><br />
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Since yesterday there are a few more on the list. But I had no time to list them on the map... So update's coming soon...DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-63626818842521993522016-03-28T08:33:00.004+02:002016-03-29T15:10:36.321+02:00Another issue of Kyodo News in ufb quality ;)<div class="separator" style="clear: both; text-align: center;">
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEja0WePLQGhacGQuc0H23hhFrscfhdaPAFaytr2tP_ddAWhV93CtoN17SmsgJdjoTjN5hbZU2Ut4Y0bK55izVdH-OpOcuGDz1AlQOHv5kGg-keoX7rI8ip9Ge_rgxm3QN94FtL2hjhtR8r0/s1600/20160328_Kyodo_News_8467kHz.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEja0WePLQGhacGQuc0H23hhFrscfhdaPAFaytr2tP_ddAWhV93CtoN17SmsgJdjoTjN5hbZU2Ut4Y0bK55izVdH-OpOcuGDz1AlQOHv5kGg-keoX7rI8ip9Ge_rgxm3QN94FtL2hjhtR8r0/s320/20160328_Kyodo_News_8467kHz.png" width="109" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Kyodo News issue 27th march, 2016.</td><td class="tr-caption" style="text-align: center;"><br /></td></tr>
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<a href="http://i.imgur.com/01Cy6yp.jpg" target="_blank">http://i.imgur.com/01Cy6yp.jpg</a></div>
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An even nicer one ;).</div>
DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-48734027159889755392016-03-26T18:16:00.001+01:002016-03-29T15:10:26.951+02:00Kyodo News decoded with Raspberry Pi ²Hi.<br />
<br />
Today I recognised there's a fax transmission on 8.467 kHz. I looked into hffax.pdf and saw that the station transmitting is Kyodo News, Japan.<br />
<br />
So I tested if Rasperry Pi ² can decode/demodulate the fax transmission. I installed fldigi. And voilá: it works fine!!!<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjVip_lCZ-229arbUuf9AU3xEPs5opo0F0bfSKtfgI_Fq1XvgjFphvob4gQCVqTVaX2F7i0GL__TKuUrrKeZUHtkt6oBRsRXcc3q0xx-WlZqVLvIfqgYuRILiMs9Gnqx1fz8VLA_oNYA9zl/s1600/20160326_1655_8467_Kyodo_News_on_RPi2.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="201" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjVip_lCZ-229arbUuf9AU3xEPs5opo0F0bfSKtfgI_Fq1XvgjFphvob4gQCVqTVaX2F7i0GL__TKuUrrKeZUHtkt6oBRsRXcc3q0xx-WlZqVLvIfqgYuRILiMs9Gnqx1fz8VLA_oNYA9zl/s320/20160326_1655_8467_Kyodo_News_on_RPi2.png" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Kyodo News, Japan on 8.467 kHz</td><td class="tr-caption" style="text-align: center;"></td><td class="tr-caption" style="text-align: center;"></td><td class="tr-caption" style="text-align: center;"><br /></td><td class="tr-caption" style="text-align: center;"><br /></td></tr>
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<iframe allowfullscreen="" class="YOUTUBE-iframe-video" data-thumbnail-src="https://i.ytimg.com/vi/oPmzY4TJSl8/0.jpg" frameborder="0" height="266" src="https://www.youtube.com/embed/oPmzY4TJSl8?feature=player_embedded" width="320"></iframe> </div>
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And here's the big picture:</div>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="http://i.imgur.com/YPGG6F5.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="http://i.imgur.com/YPGG6F5.jpg" height="320" width="99" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><a href="http://i.imgur.com/YPGG6F5.jpg" rel="nofollow" target="_blank">http://i.imgur.com/YPGG6F5.jpg</a><br />
Kyodo New paper. I had too less lines in fldigi wefax setup :/.<br />
Whole paper next time ;).</td></tr>
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Nice one :). </div>
DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-34306199262286589982016-01-31T09:53:00.000+01:002016-01-31T09:53:41.935+01:00My old World Space antennaHi.<br />
<br />
Today I'll reassemble my World Space antenna again. I hope that this antenna will work after reassembling.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKXUxA7OnhYaFKKI4Elyadeth5qB2ACNP3dGJbzzkRCqRP9lI3eXkHz-g5rz2OtYMTuYyKMJQgK2NRMoFm2jeszK6ZFVZ-2MoMFq3mnxvB5RtytIQ-wjmBA-wH_jku5mN44TB5DJkQcW1i/s1600/DSCF9661.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="239" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKXUxA7OnhYaFKKI4Elyadeth5qB2ACNP3dGJbzzkRCqRP9lI3eXkHz-g5rz2OtYMTuYyKMJQgK2NRMoFm2jeszK6ZFVZ-2MoMFq3mnxvB5RtytIQ-wjmBA-wH_jku5mN44TB5DJkQcW1i/s320/DSCF9661.JPG" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgyVJeoWaBBJKLhCU5C_bh-fnN7bD-57p117BI_-KRijWd9kziIh5NVPBzsNTWomQwfyrJBk_oh0Omdsl2L5JbL06PT7YOtgQeVMa6jJiHdH5rxeioyAX-RDnl_Rp0zeox59AFQpE8Z6Zkn/s1600/DSCF9662.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="239" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgyVJeoWaBBJKLhCU5C_bh-fnN7bD-57p117BI_-KRijWd9kziIh5NVPBzsNTWomQwfyrJBk_oh0Omdsl2L5JbL06PT7YOtgQeVMa6jJiHdH5rxeioyAX-RDnl_Rp0zeox59AFQpE8Z6Zkn/s320/DSCF9662.JPG" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiSMLbdd2tc10kpJObzt0Mnior_XsMMMGOBO96q_5sKO7qCXy5nUwp9fQ-B5wPWruNUoaJh3eEWKQO_jv8wel7m4RJAAOprQiN4K1TF4jGXYV1QWbgwi7JLFQsLcC8FMwvQYfuQmkwImRTF/s1600/DSCF9663.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="239" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiSMLbdd2tc10kpJObzt0Mnior_XsMMMGOBO96q_5sKO7qCXy5nUwp9fQ-B5wPWruNUoaJh3eEWKQO_jv8wel7m4RJAAOprQiN4K1TF4jGXYV1QWbgwi7JLFQsLcC8FMwvQYfuQmkwImRTF/s320/DSCF9663.JPG" width="320" /></a></div>
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<br />DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-33069125764662091242015-05-03T13:29:00.001+02:002015-05-03T13:29:23.671+02:00Wondering where my videos are?Hi.<br />
<br />
A few days ago Google deleted my Youtube account that I owned lot of years without any warning. <br />
<br />
The truth is that I autouploaded some videos instead of upload them manually. It seems that Google don't want this kind of uploading a video or videos with python scripts. <br />
<br />
So sorry guys. No videos inmo. DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-47775453021267223702015-01-17T09:33:00.000+01:002015-01-17T09:43:29.939+01:00DMR with DSD on Bananapi?Hello.<br />
<br />
On RTL-SDR addicted blog RTL-SDR.com I read about how to build DSD (<a href="http://forums.radioreference.com/digital-voice-decoding-software/" target="_blank">Digital Speech Decoder Toolchain</a>) on Linux. Therefore I tried to deocode DMR with this toolchain on Bananapi. The question that has to be answered was: has Bananapi enough power to receive DMR broadcasts and decode data stream with DSD same time? The answer is: almost.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj4UO6ReHSIyWHwCBwYSXXCSVFi_K02xe884bzTs0SNmi-KWLg2T1KdaqyziR6S_dl9ynFcckFZiylDG7Ec_fCNxKUXLDPtJOF-J8EG4kkShObxb2v4THhOsuLMUAMyHg08qW516O73czDJ/s1600/2015-01-10-10:23:53.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj4UO6ReHSIyWHwCBwYSXXCSVFi_K02xe884bzTs0SNmi-KWLg2T1KdaqyziR6S_dl9ynFcckFZiylDG7Ec_fCNxKUXLDPtJOF-J8EG4kkShObxb2v4THhOsuLMUAMyHg08qW516O73czDJ/s1600/2015-01-10-10:23:53.png" height="240" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-9pJL0fW-k_4EliEnEScvL2u0r5q3Uy5b5HDcFAJU3NhG_Lg-vlNu5JSz6KdssorwED5GOV-8wP3bunOmqe3NaNlblLZBj_XPnPm73gscbogdHUXwJ5u28yAdVXwhyphenhyphenFBFtfBLZXn17uOY/s1600/2015-01-10-10:27:56.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-9pJL0fW-k_4EliEnEScvL2u0r5q3Uy5b5HDcFAJU3NhG_Lg-vlNu5JSz6KdssorwED5GOV-8wP3bunOmqe3NaNlblLZBj_XPnPm73gscbogdHUXwJ5u28yAdVXwhyphenhyphenFBFtfBLZXn17uOY/s1600/2015-01-10-10:27:56.png" height="240" width="320" /></a></div>
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Even if Bananapi has two CPU cores with about 1GHz something seems to be not right. As you can see Bananapi takes "only" 70% CPU on both cores. But the result of the decoded datastream exported as wav file is, uhm, very choppy.</div>
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<a href="https://soundcloud.com/de8msh/out2" target="_blank">DMR transmisison in "choppy mode</a>"</div>
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I don't think that problem is power of the signal itself. It's about 20dB above noise.</div>
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To be continued...</div>
<br />DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-61707403378137959402015-01-17T09:10:00.002+01:002015-01-17T11:41:59.907+01:00Very first picture of Meteor M N°2Hi.<br />
<br />
A few days ago I could get a decent broadcat of Meteor M N°2 satellite. Here's the result.<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgDJytBvvXEx7JYb2iuX1Wsr8tQF93VVQGEeidQ0NUuGO9Xs2bm9UflemyR_g6Ub3dnEyS2oIcRVE-ykYsdthMCeLZwVOiRJK-FjQ6dkifhP3g3zgceGFDIAufnuXeJsUe5R2AocEf5Wv9j/s1600/060115_203017.s_455inv-rectified.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgDJytBvvXEx7JYb2iuX1Wsr8tQF93VVQGEeidQ0NUuGO9Xs2bm9UflemyR_g6Ub3dnEyS2oIcRVE-ykYsdthMCeLZwVOiRJK-FjQ6dkifhP3g3zgceGFDIAufnuXeJsUe5R2AocEf5Wv9j/s1600/060115_203017.s_455inv-rectified.jpg" height="187" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">My very first picture of Meteor M N°2 digital transmission<br />
Great Britain on the left. Baltic sea, golf of Riga, golf of Finland on the right.</td></tr>
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My setup was Bananpi and R820T RTLSDR with toolchain by DH1MLJ, DIY QFH, TV SAT PREAMP. Always remember: this was the first test of the setup.<br />
<br />
Even if this picture isn't as good as the ones in Satellitenwelt forum it's obvious that the picture qaulity is far better then the quality of the NOAA APT pictures.<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="http://qth.at/de8msh/wxtoimg/noaa-19-201410111159-mcir.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="http://qth.at/de8msh/wxtoimg/noaa-19-201410111159-mcir.jpg" height="320" width="289" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">NOAA APT analogue transmission</td></tr>
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DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-66991789494917854782015-01-08T10:19:00.000+01:002015-01-17T09:03:23.603+01:00Waiting for Meteor M N°2. Ready to go image.Hi.<br />
<br />
After I read about a ready to go Bananapi operation system image with Meteor M N°2 recording tools (scripts) on Satellitenwelt forum I'm trying to get a fine record of the satellite signal:<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEib7Alxu_EzoE6Q6uFZonIC6Un6CJBy6kC3EfCob7PR9wxtCG1piLitq65iVGgDhAjiKTPmmA-dH0_RXAecRufaOUfZ_ZxT5TSXeiz6ZbJ_q-kKuNEbPXca3ropwT6v0R8FIzkxSfP6yhwF/s1600/waiting_for_meteor.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEib7Alxu_EzoE6Q6uFZonIC6Un6CJBy6kC3EfCob7PR9wxtCG1piLitq65iVGgDhAjiKTPmmA-dH0_RXAecRufaOUfZ_ZxT5TSXeiz6ZbJ_q-kKuNEbPXca3ropwT6v0R8FIzkxSfP6yhwF/s1600/waiting_for_meteor.png" height="181" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Bananapi is ready to record signals of Meteor M N°2</td><td class="tr-caption" style="text-align: center;"><br /></td><td class="tr-caption" style="text-align: center;"><br /></td></tr>
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The image was created by om DH1MLJ. You can read more about it in this threat:<br />
<br />
http://www.forum.satellitenwelt.de/viewtopic.php?f=2&t=774&sid=dc71034e9510305f67a9c56acdd1ad7b<br />
<br />
Thank you very much to the fine guys of Satellitenwelt Forum for sharing such an interesting information!<br />
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Good luck!DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-35290206278786174362015-01-04T09:51:00.000+01:002015-01-04T09:52:49.550+01:00Bananapi and GQRX - works with low samplerateHi.<br />
<br />
Yesterday I found this interesting website from OP Michael, DG0OPK. It describes howto use Cubieboard and Bananapi for ham radio stuff:<br />
<br />
http://www.qslnet.de/member/dg0opk/<br />
and<br />
http://www.qslnet.de/member/dg0opk/Cubieboard2_March2014.html<br />
<br />
The section "update: 6.December 2014" refers to Igor's website. Igor created a Bananapi image without any x server or something else. As you can read on Michael's page he writes down howto install x server and ham radio stuff.<br />
<br />
Then I decided to install GQRX to test how it works on a 1GHz/1GB dual core embeded system. SDR is the well known RTLSDR R820T.<br />
<br />
Here's the result:<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiK8SpIdPCWzYmYlsNkeh4xM-BG0ltb6ue6Of-A63rSjK37plfwNXujX3RCSDqN4SnWovyYd2wmhPEUDT-sEInMEkhsH50sd9QcWtDubr5OwH0vqjEIoxuu03ui0mARmv-8SIcTChF40vCf/s1600/2015-01-04-093843_1280x1024_scrot.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiK8SpIdPCWzYmYlsNkeh4xM-BG0ltb6ue6Of-A63rSjK37plfwNXujX3RCSDqN4SnWovyYd2wmhPEUDT-sEInMEkhsH50sd9QcWtDubr5OwH0vqjEIoxuu03ui0mARmv-8SIcTChF40vCf/s1600/2015-01-04-093843_1280x1024_scrot.png" height="256" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">GQRX on Bananapi</td></tr>
</tbody></table>
<br />
As you can see GQRX takes about 60% to 70% of CPU. You have to set samplerate to 250kS. All values above 250kS causes the CPU to use 100% of both cores :(.<br />
<br />
But it's a beginning.DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-25164400675909628132014-12-20T21:44:00.000+01:002014-12-20T21:44:26.067+01:00ISS SSTV pirctures. Me, too.Hi.<br />
<br />
ISS crew sends some nice SSTV pictures from outer space to earth.<br />
<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOjrmLKtGkNvQ2GZEtRlsWRPpwvTfJDwiDH70FiRdWJN8FVIZPVImxVjwavlUiKpIH6XCKV-Y3uz_xZnbVoDN28qtg71A5G2Gwd9WIRSjgRFrPJUY2tWzEr-nEQz3sebgIz_kpVZqqJIq3/s1600/201412201247.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOjrmLKtGkNvQ2GZEtRlsWRPpwvTfJDwiDH70FiRdWJN8FVIZPVImxVjwavlUiKpIH6XCKV-Y3uz_xZnbVoDN28qtg71A5G2Gwd9WIRSjgRFrPJUY2tWzEr-nEQz3sebgIz_kpVZqqJIq3/s1600/201412201247.jpg" height="248" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFgYAcHSSxozdtOCYUAK1B6X7cE9Bxm9Cr69LEoPHNhsNpMofszEf0dx5wISav_Y6PCk_QD9-vgY8P9ftrUDkuD9Mya28Z-dZojwLwVPG0IIOyCbFxRKzMiLxj7LbA9-lgm_KuZ881CcrL/s1600/201412201423.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFgYAcHSSxozdtOCYUAK1B6X7cE9Bxm9Cr69LEoPHNhsNpMofszEf0dx5wISav_Y6PCk_QD9-vgY8P9ftrUDkuD9Mya28Z-dZojwLwVPG0IIOyCbFxRKzMiLxj7LbA9-lgm_KuZ881CcrL/s1600/201412201423.jpg" height="248" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDwNeYVIGn2rIlmzkF1T_tjWusl1aCdC_pM5vW2ACIEDomtettZXz5FWS-FH5VU508BHOKrUFSRS-qKJWSPAWQywjtwa_j2TDxKsqWus-BUbSa5iEqrrWWaxkTc5ovffBTgW8sDIm-QCw-/s1600/201412201601.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDwNeYVIGn2rIlmzkF1T_tjWusl1aCdC_pM5vW2ACIEDomtettZXz5FWS-FH5VU508BHOKrUFSRS-qKJWSPAWQywjtwa_j2TDxKsqWus-BUbSa5iEqrrWWaxkTc5ovffBTgW8sDIm-QCw-/s1600/201412201601.jpg" height="248" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsjl-T45fTUgvXkzl-0cfOsr27riNyASepBu9yMaDIuvOGo4yMg2MNE2goBCpuillFvdFv_vfex6JY5k9i66kkwfBbw1qIDFwQ92IojXePx16reNbU2uDhCvziLOvTHaE6l0JoiQyu5FvQ/s1600/201412201731.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsjl-T45fTUgvXkzl-0cfOsr27riNyASepBu9yMaDIuvOGo4yMg2MNE2goBCpuillFvdFv_vfex6JY5k9i66kkwfBbw1qIDFwQ92IojXePx16reNbU2uDhCvziLOvTHaE6l0JoiQyu5FvQ/s1600/201412201731.jpg" height="248" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEghYTSHYIkTo5dYi88shEMuMAkgH3J6TljHdn8ClDMzaUVEhaVUOqITY4IoTD_gaOG2J4m6JAiG_ZfRbzjqutIjJsefdgAUMzToqXnQPaiyi0SsD9Ym1z2keSosyNfCb9fTSavUNJcSteW-/s1600/201412201738.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEghYTSHYIkTo5dYi88shEMuMAkgH3J6TljHdn8ClDMzaUVEhaVUOqITY4IoTD_gaOG2J4m6JAiG_ZfRbzjqutIjJsefdgAUMzToqXnQPaiyi0SsD9Ym1z2keSosyNfCb9fTSavUNJcSteW-/s1600/201412201738.jpg" height="248" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_nql42sfXsWTixeoBD2ZSUU3tooSH0mCRb1qUXatcB0-oiWpWhqn7A_5ITSoU-uQsbUjnTgXVrp0yCyk5chS0nwENDtyM9T153e3N57lbhf0aEh_RC2YFBlTjU6njTyvID0H9xqROXf7p/s1600/201412201914.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_nql42sfXsWTixeoBD2ZSUU3tooSH0mCRb1qUXatcB0-oiWpWhqn7A_5ITSoU-uQsbUjnTgXVrp0yCyk5chS0nwENDtyM9T153e3N57lbhf0aEh_RC2YFBlTjU6njTyvID0H9xqROXf7p/s1600/201412201914.jpg" height="248" width="320" /></a></div>
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<br /></div>
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As you can see quality isn't that good. I don't know if it is a problem with my antenna...</div>
<div class="separator" style="clear: both; text-align: left;">
<br /></div>
<div class="separator" style="clear: both; text-align: left;">
Setup:</div>
<div class="separator" style="clear: both; text-align: left;">
COMMTEL COM 212</div>
<div class="separator" style="clear: both; text-align: left;">
DIY QFH</div>
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MMSSTV</div>
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SAT AMP</div>
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<br /></div>
<div class="separator" style="clear: both; text-align: left;">
I hope next time to get better quality pictures ;).</div>
DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-43886644683262809972014-12-14T08:50:00.002+01:002015-01-17T08:48:01.523+01:00WSPR: RTLSDR vs FRG100Hi.<br />
<br />
Yesterday I compared WSRP with two different RX. The first was RTLSDR (E4000 as direktsampler) and YAESU FRG-100. Both on same antenna. 12m wire on 9:1 unun.<br />
<br />
The result is not that much different as I expected. Have a look at this animation. It shows stations from within Europe on 30m band.<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
</div>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEirJnLfmvQ5k6m2F940EaU36dACS1wI8jTxVZsRRj1p13XWKOw-MZmlj8fUgvMUASpMa-gEj9RLmVHKJGJN0b4ZrHNH9mN0gAIM46Qb60_2CmUa_gAN7pL1dabA_kihnFFeTd6cMB94Nsmd/s1600/RTLvsFRG.gif" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEirJnLfmvQ5k6m2F940EaU36dACS1wI8jTxVZsRRj1p13XWKOw-MZmlj8fUgvMUASpMa-gEj9RLmVHKJGJN0b4ZrHNH9mN0gAIM46Qb60_2CmUa_gAN7pL1dabA_kihnFFeTd6cMB94Nsmd/s1600/RTLvsFRG.gif" height="257" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">WPSR on 30m band</td><td class="tr-caption" style="text-align: center;"><br /></td><td class="tr-caption" style="text-align: center;"><br /></td><td class="tr-caption" style="text-align: center;"><br /></td></tr>
</tbody></table>
Even if the FRG-100 has bigger SNR (-70dB vs -50dB of RTL) WSPR gets not more stations.<br />
<br />
Remeber: this is not a high end scientific research! Hower, it's interesting to see that WSPR is able to decode nearly same stations.<br />
<br />
Setup:<br />
<br />
WSPR<br />
12m wire<br />
9:1 unun<br />
RTLSDR e4k (SDR#)<br />
YAESU FRG-100 (on soundcard)DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-42226999222697287082014-10-11T15:57:00.001+02:002014-10-12T11:51:14.472+02:00Raspberry Pi does NOAA APTHi.<br />
<br />
After a long peroid of time using Raspberry Pi as ADS-B decoder I found my good ole Emgo RX137 on the attic again.<br />
<br />
I connected the RX to a 3$ chinese USB soundcard. Then I installed the latest beta of WXToImg on Raspian.<br />
<br />
After testing the setup it finaly works fine.<br />
<br />
Have a closer look at<br />
<br />
<a href="http://qth.at/de8msh/wxtoimg/index.html" target="_blank">http://qth.at/de8msh/wxtoimg/index.html</a><br />
<br />
and<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<object width="320" height="266" class="BLOGGER-youtube-video" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" data-thumbnail-src="https://i.ytimg.com/s_vi/W6N5fzQe2Gk/default.jpg?sqp=CMid6aEF&rs=AOn4CLBkhl92lkkiqFBpFrqPzh511Uba9g"><param name="movie" value="https://www.youtube.com/v/W6N5fzQe2Gk?version=3&f=user_uploads&c=google-webdrive-0&app=youtube_gdata" /><param name="bgcolor" value="#FFFFFF" /><param name="allowFullScreen" value="true" /><embed width="320" height="266" src="https://www.youtube.com/v/W6N5fzQe2Gk?version=3&f=user_uploads&c=google-webdrive-0&app=youtube_gdata" type="application/x-shockwave-flash" allowfullscreen="true"></embed></object></div>
<br />
<br />
My setup is Raspberry Pi B, Emgo RX137, USB soundcard, DIY QFH antenna.<br />
<br />
Thanks to WXToImg team for transporting this fine software to ARM cpu.<br />
<br />
<br />
<br />DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-26397980486939328132014-08-01T12:03:00.002+02:002014-08-01T12:04:18.622+02:00waterfall.py by keenerdHi.<br />
<br />
T'day I'm trying waterfall.py by keenderd the first time. You can download the script from here: https://github.com/keenerd/rtlsdr-waterfall.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsNA6b8lOn0f7iJCvGX0-Hmus3e3vZDB6KgjdMGbBv8u9pP6niBoGUkXs_GPg1MG8u5tBtKM7A6mnZRR7ELg9q65SDFtwvnV0ipj0-vvkZO5Wh9pouarnxM43dCMxoNA8Iun0_ZPvPD-p8/s1600/Bildschirmfoto+vom+2014-08-01+11:58:00.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsNA6b8lOn0f7iJCvGX0-Hmus3e3vZDB6KgjdMGbBv8u9pP6niBoGUkXs_GPg1MG8u5tBtKM7A6mnZRR7ELg9q65SDFtwvnV0ipj0-vvkZO5Wh9pouarnxM43dCMxoNA8Iun0_ZPvPD-p8/s1600/Bildschirmfoto+vom+2014-08-01+11:58:00.png" height="200" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">CLick to enlarge</td><td class="tr-caption" style="text-align: center;"><br /></td><td class="tr-caption" style="text-align: center;"><br /></td></tr>
</tbody></table>
If you start the script with <i>python waterfall.py 935000000 960000000 for example </i>you'll get a result like the one in the picture above. It's showing the GSM 900 band with hopping and non-hopping signals.<br />
<br />
<br />DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-37729105843392714742014-06-22T16:42:00.003+02:002014-06-22T18:56:05.252+02:00My newest antenna: Eggbeater II for 70cm ham radio satellite bandHi,<br />
<br />
after visiting our local bulding center yesterday, I assembled the Eggbeater II antenna today.<br />
<br />
Have a look at:<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjeb-PTTyUrYvvBLY0U89PJ1k58DWV4cCs0Rrf-OGOIEQ_hsnr1yN6rli-K4uDmM4mldd1KdPGe4iKKGMbgQPQwd1h3pzvlyMQBkjaHA2T0QLA6COD6_VJ4KL86iuJhg7mk70QMkEb-q-QG/s1600/DSCF6989.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjeb-PTTyUrYvvBLY0U89PJ1k58DWV4cCs0Rrf-OGOIEQ_hsnr1yN6rli-K4uDmM4mldd1KdPGe4iKKGMbgQPQwd1h3pzvlyMQBkjaHA2T0QLA6COD6_VJ4KL86iuJhg7mk70QMkEb-q-QG/s1600/DSCF6989.JPG" height="239" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Click to enlarge</td></tr>
</tbody></table>
It's the 70cm version for ham radio satellites. I followed the tutorial written by ZR6AIC, Anton. You can find his tut here: http://zr6aic.blogspot.de/2013/03/building-my-eggbeater-ii-omni-leo.html<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjA91ewC1O260Kt1ZaWG9R3dusogLSe9KRI8lc1QSM2p6ONTWk2ff4ZAOmpKh2czIwfWHBhLueAC94PhUnuXOtdqQ_HvpXFWouUkAkxYLMuoLYWtsT_m0DLCtHIG_rCA7iM5vNsr-Tn5AAw/s1600/ebii.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjA91ewC1O260Kt1ZaWG9R3dusogLSe9KRI8lc1QSM2p6ONTWk2ff4ZAOmpKh2czIwfWHBhLueAC94PhUnuXOtdqQ_HvpXFWouUkAkxYLMuoLYWtsT_m0DLCtHIG_rCA7iM5vNsr-Tn5AAw/s1600/ebii.jpg" height="24" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Click to enlarge. Red dots == doppler of satellites</td></tr>
</tbody></table>
As you can see there a few strong signals. I feel that this antenna is the best one I ever build for 70cm satellites. But let me check this out the upcomming days...<br />
<br />
I just made a short movie that shows the performance of the antenna:<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.youtube.com/embed/0RnVyQQRPyU?feature=player_embedded' frameborder='0'></iframe></div>
<br />DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-68301452681668217312014-06-18T20:52:00.000+02:002014-06-19T05:48:40.008+02:00"Yes sir, there are a lot of them in outter space."Hi,<br />
<br />
since a few days I'm tracking the 70cm ham sat band from 435 to 438 MHz. An yes: they're still alive. :)<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrXCzo2q5XleewWI4OQlvCA8PeGXezUXinka_RkzFh3jw3NIlg5sfSdA6209HU4XtFU55nWUwTfo9FcrijbA1E1Ym4JR_zfcVcmsU9ByseJbEj-1ZpkH_mhj7KjdexLB0MoUAYc5O1P-57/s1600/hamsats.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrXCzo2q5XleewWI4OQlvCA8PeGXezUXinka_RkzFh3jw3NIlg5sfSdA6209HU4XtFU55nWUwTfo9FcrijbA1E1Ym4JR_zfcVcmsU9ByseJbEj-1ZpkH_mhj7KjdexLB0MoUAYc5O1P-57/s1600/hamsats.jpg" height="320" width="318" /></a></div>
<br />
Every red dot marks a doppler of a satellite.<br />
<br />
<a href="http://qth.at/de8msh/bilder/hamsats.jpg" target="_blank">Click to enlarge.</a><br />
<br />
Now I've to identify the calls of the satellites.DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-66184971203514258442014-06-15T12:17:00.001+02:002014-06-18T20:44:06.642+02:00Found a few pictures of airplane and garves radar doppler - a short movieHi,<br />
<br />
I found a few pictures of airplane and garves radar doppler I did with HDSDR, speclab and rtlsdr on my old harddisk . I made a short movie out of a bunch of jpegs.<br />
<br />
Have a look at:<br />
<br />
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</div>
<div class="separator" style="clear: both; text-align: center;">
<object class="BLOGGER-youtube-video" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" data-thumbnail-src="https://ytimg.googleusercontent.com/vi/PR_MxN_4WAg/0.jpg" height="266" width="320"><param name="movie" value="https://youtube.googleapis.com/v/PR_MxN_4WAg&source=uds" /><param name="bgcolor" value="#FFFFFF" /><param name="allowFullScreen" value="true" /><embed width="320" height="266" src="https://youtube.googleapis.com/v/PR_MxN_4WAg&source=uds" type="application/x-shockwave-flash" allowfullscreen="true"></embed></object></div>
<br />
This movie shows doppler of airplanes on AM atis transmitters or meteors reflected by graves radar france. Don't look at the box in the left corner. It has wrong frequency values and many typos. <br />
<br />
<br />
<br />
<br />DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-66371998197031990582013-12-15T17:56:00.002+01:002013-12-15T18:13:57.918+01:00Doppler experimentsHi,<br />
<br />
inspired by OM DJ0MY (thanks!) I tried to get some nice doppler signals. I tuned to Graves radar on 143.050 MHz and Hamburg ATIS on 123.125 MHz.<br />
<br />
With my "new" diy lindenblaad type antenna (new == 1,5 years old ;) ) for 70cm I caught a few nice doppler signals.<br />
<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-70NYQgIUVJFlBMAKh49ehzJqzxaNByj1QMlhbiMfPaZCRvwloVGMbDYB9pnSLp9137Hklw1HNIfo6SHv4tQ6V0AOvwbSYdwC3fK3hHWTNt8o31wX3R3Wsq8yEYG8iy4qkQt2f7Mqi2Wo/s1600/7cmAntenne.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="313" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-70NYQgIUVJFlBMAKh49ehzJqzxaNByj1QMlhbiMfPaZCRvwloVGMbDYB9pnSLp9137Hklw1HNIfo6SHv4tQ6V0AOvwbSYdwC3fK3hHWTNt8o31wX3R3Wsq8yEYG8iy4qkQt2f7Mqi2Wo/s320/7cmAntenne.jpg" width="320" /></a></div>
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<br />
Let's go :) .<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiF0wfyzQQJTfwCZ9U5Z5ykaXS-2MVB1HlJTv4Gw7EPahCEF3oG2l-3CFC9WgmFY3uidBMtsmhqTD9ELKGSQahDCs4OR6fliK2xY9MHxm50klU3vgIIR40DGcw6PMhGT6kYqtt_ovllmV5l/s1600/doppler_of_planes_hamburg_atis_dit_abt_120km.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="387" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiF0wfyzQQJTfwCZ9U5Z5ykaXS-2MVB1HlJTv4Gw7EPahCEF3oG2l-3CFC9WgmFY3uidBMtsmhqTD9ELKGSQahDCs4OR6fliK2xY9MHxm50klU3vgIIR40DGcw6PMhGT6kYqtt_ovllmV5l/s640/doppler_of_planes_hamburg_atis_dit_abt_120km.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Doppler by planes on Hamburg ATIS frequency. The transmitter should be about 120km away. </td></tr>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_9ePXhHnTMRH9sK5rPiIZk2IE9c9eTtEHWN3YFL-OTwlPllnfpx0YJrAnJmV1G7vgWeQ2NDjx5Qt-PPRhyphenhyphen6d7K3gJin72GcFFf7Gn9VcYPJzxYt-wM44pC03TgZYKf0a2GUqcvosZqA1E/s1600/doppler_of_planes_hamburg_atis_dit_abt_120km_80hz_drift.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_9ePXhHnTMRH9sK5rPiIZk2IE9c9eTtEHWN3YFL-OTwlPllnfpx0YJrAnJmV1G7vgWeQ2NDjx5Qt-PPRhyphenhyphen6d7K3gJin72GcFFf7Gn9VcYPJzxYt-wM44pC03TgZYKf0a2GUqcvosZqA1E/s640/doppler_of_planes_hamburg_atis_dit_abt_120km_80hz_drift.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Frequency drift of RTLSDR, maybe.</td></tr>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiaAGk_c9RIeSzytT4EKCbOuVHPvgkuDSU4kM62boNPlYK25szIjataXWIC1rt9Zvy2EDIK-QK0vRIvC-Mg06IEFHeXB9jYsAXqv52yYcgeSGLsjApHXl_4rMSWVFZ2_FF7hf_nwQXV3iv2/s1600/doppler_of_planes_hamburg_atis_dit_abt_120km_direction.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="388" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiaAGk_c9RIeSzytT4EKCbOuVHPvgkuDSU4kM62boNPlYK25szIjataXWIC1rt9Zvy2EDIK-QK0vRIvC-Mg06IEFHeXB9jYsAXqv52yYcgeSGLsjApHXl_4rMSWVFZ2_FF7hf_nwQXV3iv2/s640/doppler_of_planes_hamburg_atis_dit_abt_120km_direction.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Distance between QTH and Hamburg ATIS transmitter.</td><td class="tr-caption" style="text-align: center;"><br /></td><td class="tr-caption" style="text-align: center;"><br /></td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJ7n4uuJkPW6NhEvslkLDweEoZd75H6Iiz-EcpFAIsBrurlxJE2JyKyIoKt6WYZXf4dN_99QYH9Nv_lxw9Nuo7J0HGPsgfC2KCnaQLTT3paoYv9Ip-VreySd53QbkkGeCgTUwmaKi2mrKu/s1600/iss_doppler.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="492" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJ7n4uuJkPW6NhEvslkLDweEoZd75H6Iiz-EcpFAIsBrurlxJE2JyKyIoKt6WYZXf4dN_99QYH9Nv_lxw9Nuo7J0HGPsgfC2KCnaQLTT3paoYv9Ip-VreySd53QbkkGeCgTUwmaKi2mrKu/s640/iss_doppler.png" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Doppler by ISS on Graves radar frequency 143.050MHz. See pulse/pulse break on ISS. ISS was about 1000km away - or more...</td><td class="tr-caption" style="text-align: center;"><br /></td><td class="tr-caption" style="text-align: center;"><br /></td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjAtY2deQMUg9ZktYQRzyeehj91tSqtAD9f43gouYAr-govv6VWS5A3DGWM1sYTMuN5VBnxNg7Wb99-LjK5gArV6DhaCKl6jCdCS5sUn6h0hvZb1f0O1yftDFeigAklBXsWtUMComBeKLUD/s1600/radar_pulse_break.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="406" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjAtY2deQMUg9ZktYQRzyeehj91tSqtAD9f43gouYAr-govv6VWS5A3DGWM1sYTMuN5VBnxNg7Wb99-LjK5gArV6DhaCKl6jCdCS5sUn6h0hvZb1f0O1yftDFeigAklBXsWtUMComBeKLUD/s640/radar_pulse_break.png" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Pulse break from Graves radar on ISS.</td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgvF-QbcGF30NXvbz7W14ErOHMea4MF8KdmCvoXhu_uf8P4GpVb0vh5CFM-louwoSDpdCbvkftXTAjoVn4e0EoZDbFoRJvxmZ126-5nFr8AIm6FGJK0HrwzAjwbGeAm1p4p8ilc4gDEa97o/s1600/radar_pulse_length.png" style="margin-left: auto; margin-right: auto;"><img border="0" height="408" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgvF-QbcGF30NXvbz7W14ErOHMea4MF8KdmCvoXhu_uf8P4GpVb0vh5CFM-louwoSDpdCbvkftXTAjoVn4e0EoZDbFoRJvxmZ126-5nFr8AIm6FGJK0HrwzAjwbGeAm1p4p8ilc4gDEa97o/s640/radar_pulse_length.png" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Pulse length from Graves radar on ISS.</td></tr>
</tbody></table>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgvF-QbcGF30NXvbz7W14ErOHMea4MF8KdmCvoXhu_uf8P4GpVb0vh5CFM-louwoSDpdCbvkftXTAjoVn4e0EoZDbFoRJvxmZ126-5nFr8AIm6FGJK0HrwzAjwbGeAm1p4p8ilc4gDEa97o/s1600/radar_pulse_length.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><br /></a></div>
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<br />DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-49474738767277604702013-12-10T21:41:00.002+01:002013-12-10T21:44:43.761+01:00Latest wx ballon heatmapHi,<br />
<br />
last night I did a new heatmap with RTL_POWER. The frequency range is 404MHz to 406MHz. Intervall 30 seconds and binsize is 2000Hz.<br />
<br />
I wanted to know which wx balloon signals are available at my place.<br />
<br />
This is the result of 13,5 hours recording.<br />
<br />
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<a href="http://www.qth.at/de8msh/bilder/heatmaps/404-406wxballoons.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="640" src="http://www.qth.at/de8msh/bilder/heatmaps/404-406wxballoons.png" width="408" /></a></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="http://www.qth.at/de8msh/bilder/heatmaps/404-406wxballoons.png">http://www.qth.at/de8msh/bilder/heatmaps/404-406wxballoons.png</a></div>
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I caught seven balloons on five different frequencies in wx balloon band. Next time I will try to decode them with Sondemonitor by COAA.</div>
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<br />DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-56698906653842573422013-12-01T11:01:00.002+01:002013-12-01T11:05:27.373+01:00Reflections of Graves radar, Dijon, FranceHi.<br />
<br />
Yesterday a well known OM told me about Graves radar located near Dijon in Framce. It's waves are transmitted on 143.050 MHz.<br />
<br />
If you tune your rx on this frequency and watch the FFT with HDSDR for e.g. you can see reflections of these waves on objects that are flying in the air above.<br />
<br />
There objects could be planes, asteroids, meteroids, ISS and other things in heaven above.<br />
<br />
Have a look at this video, please. You can see a few of these reflections. Some a small, some are bigger. The duration of the recording is about 34 minutes.<br />
<br />
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<iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.youtube.com/embed/tvVKKCJN0iM?feature=player_embedded' frameborder='0'></iframe></div>
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<a href="https://www.youtube.com/watch?v=tvVKKCJN0iM">https://www.youtube.com/watch?v=tvVKKCJN0iM</a></div>
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The distance between my ocation and the Graves radar is about 680km. </div>
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<br />DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-38043904240083867212013-11-23T21:46:00.000+01:002013-11-23T21:53:33.618+01:00HOPE OSCAR 68Hi all.<br />
<br />
tonight I caught the telemetry beacon of ham radio satellite HO 68.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgS4AVdl8ajs4FO3QNAvxMAku9vtPgtRl0r4LNS1ZMoz2xSnXkLudhjuWT5DmimUWznswi0Ao6VNNBhFm__EMsrmCwUFx0JYfDGDx92TNmyFax3pFhmvhuVpXa6s2n9KNAVGa-aEmvF1zDx/s1600/amsat.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="368" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgS4AVdl8ajs4FO3QNAvxMAku9vtPgtRl0r4LNS1ZMoz2xSnXkLudhjuWT5DmimUWznswi0Ao6VNNBhFm__EMsrmCwUFx0JYfDGDx92TNmyFax3pFhmvhuVpXa6s2n9KNAVGa-aEmvF1zDx/s640/amsat.png" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">HO-68 telemetry cw signal. Analysed with SA free. Click to enlarge.</td></tr>
</tbody></table>
<br />
<br />
My setup:<br />
<br />
RTLSDR<br />
TV satellite amplifier 40-2400MHz<br />
Seven element yagi antenna for 70cm band, 30° elevation, about 160° azimut, under roof<br />
HDSDR<br />
<br />
I'm waiting for more amateur satellite signals to come...<br />
<br />
<br />
<br />
<br />DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-25405592609387581782013-11-16T10:12:00.001+01:002013-11-16T10:14:11.774+01:00RTLSDR: rtl_power - another exampleHello,<br />
<br />
yesterday I used rtl_power to create another heatmap. It covers the frequency range from 3 MHz to 5 Mhz.<br />
<br />
Have a look at here, please:<br />
<br />
<a href="http://www.qth.at/de8msh/bilder/heatmaps/hf.png">http://www.qth.at/de8msh/bilder/heatmaps/hf.png</a><br />
<br />
ATTENTION: this picture has a size of 17 MB! :)<br />
<br />
As you can see there are many stations that come an go again. Ham radio stations, BC stations, Stanag 4285 and many more...<br />
<br />
<br />
<br />
<br />DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-27087364362365573442013-11-14T06:49:00.001+01:002013-11-14T20:41:22.621+01:00RTLSDR: rtl_powerHi.<br />
<br />
There's a new utility in the famous RTLSDR package: rtl_power. Coder keenerd says about it:<br />
<br />
<span style="background-color: #fafafa; font-family: verdana, arial, helvetica, sans-serif; font-size: x-small;"><i>Rtl_power is a small CLI tool for logging wide swaths of bandwidth. You can specify any chunk of spectrum, with any FFT bin size and any logging rate. (For sane values of any.)</i></span><br />
<span style="background-color: #fafafa; font-family: verdana, arial, helvetica, sans-serif; font-size: x-small;"><i><br /></i></span>
<br />
<span style="font-family: verdana, arial, helvetica, sans-serif;">Read more at reddit:</span><br />
<br />
<br />
<a href="http://www.reddit.com/r/RTLSDR/comments/1kpf3m/new_utility_rtl_power/">http://www.reddit.com/r/RTLSDR/comments/1kpf3m/new_utility_rtl_power/</a><br />
<br />
I've done a hf scan with rtl_power lately. It shows a spectrum graphic from 3MHz to about 15MHz.<br />
<br />
You can see it here:<br />
<br />
<a href="http://picpaste.de/pics/hf_3M_15M_2.1384457866.jpg">http://picpaste.de/pics/hf_3M_15M_2.1384457866.jpg</a><br />
<br />
Attention: it's a big picture! ;)<br />
<br />
You can see many bc stations that come and go. OTHR are visible, too. And many other stations.<br />
<br />
My setup was a DVB-Tstick modified as direct sampler. I connected my 12m wire to it.<br />
<br />
It's a very cheat solution for non realtime / longterm hf band observations. But you can also use it with a unmodified DVB-T stick, too.<br />
<br />
And now have some fun with rtl_power :)DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-47721793079122898852013-09-27T08:35:00.002+02:002013-10-15T07:01:35.096+02:00PA0RDT antenna on soundcardSince yesterday I'm using my good ole PA0RDT antenna again. I connected it directly to the soundcard of my "radio pc". On this pc there is Speclab/DL4YHF running.<br />
<br />
The soundcard is a simple 48kHz range type. So a samplerate of 24kHz is possible. That means that Speclab can sample from 0 to 24kHz, too.<br />
<br />
Here's the result:<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfn8xoqiGffwc9AEVw70YJa2LELt4Bm1UI_Bbax4-wYWA6erFAfR2C6NTj9hbDBgz0boxkLht8Uwe5fTaOghP8bJpzI5Z_WdMo3tGe3hyphenhyphen_-g6qG2qKYBQG5EgkZl2Z8502JVDLqNG2hO_c/s1600/VLF.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="174" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfn8xoqiGffwc9AEVw70YJa2LELt4Bm1UI_Bbax4-wYWA6erFAfR2C6NTj9hbDBgz0boxkLht8Uwe5fTaOghP8bJpzI5Z_WdMo3tGe3hyphenhyphen_-g6qG2qKYBQG5EgkZl2Z8502JVDLqNG2hO_c/s320/VLF.jpg" width="320" /></a></td></tr>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjFO50Pzmr5h3M790T3NQsgtyNO5RjF_i4BF0xObej-xmZyZGTGHV1sJo9e1hm00P1eaFXJ6JDQX1KTeQ67lCT0apPMKarCT4F6AAkXbv-FZq49T6b6EcTmNkneLxV0sU6UqUmM88j37_P5/s1600/vlf.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="194" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjFO50Pzmr5h3M790T3NQsgtyNO5RjF_i4BF0xObej-xmZyZGTGHV1sJo9e1hm00P1eaFXJ6JDQX1KTeQ67lCT0apPMKarCT4F6AAkXbv-FZq49T6b6EcTmNkneLxV0sU6UqUmM88j37_P5/s320/vlf.jpg" width="320" /></a></div>
PA0RDT. PC. Soundcard. Speclab.</td></tr>
</tbody></table>
It's kind of fun to do VLF with a tiny setup like that. Needless to say that a 96kHz of 192kHz soundcard would be more fun ;) .DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.comtag:blogger.com,1999:blog-1800125368642654253.post-57672621226605339562013-06-08T09:29:00.002+02:002013-06-08T09:49:40.986+02:00The latest dump1090 looks niceI supported the dump1090 project with SVG data for 'real looking' planes. This plane shaped markers are looking way better then the original arrows.<br />
<br />
This data is integrated in the bdavenport/terribl fork of the MalcomRobb tree.<br />
<br />
https://github.com/terribl/dump1090<br />
<br />
They did range rings, visualized reception data and some other cool gmap stuff, too.<br />
<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjv5HLyIVvQIX0zfXYhB8Bv1yZgT-2vCYTANP7wwm3FqiapFBEQ_ZZNAEqk3-rJmNlpZC8XUB2gPtlyRhyphenhyphennY4xkCIMmXOgPJZl2JEoMgkNWTg4gp9YEQ1OkP4wXuulH6hRu0LeDJ6RZtRqU/s1600/d1090.jpg" imageanchor="1"><img border="0" height="444" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjv5HLyIVvQIX0zfXYhB8Bv1yZgT-2vCYTANP7wwm3FqiapFBEQ_ZZNAEqk3-rJmNlpZC8XUB2gPtlyRhyphenhyphennY4xkCIMmXOgPJZl2JEoMgkNWTg4gp9YEQ1OkP4wXuulH6hRu0LeDJ6RZtRqU/s640/d1090.jpg" width="640" /></a><br />
<br />
So dump1090 looks little like a fusion of VRS and adsbSCOPE :).<br />
<br />
Keep up the good work buddies.DE8MSHhttp://www.blogger.com/profile/04256193945904311085noreply@blogger.com