[et_pb_section fb_built=”1″ admin_label=”Get In Touch Section” _builder_version=”3.2.1″ background_color=”#1e1d1c” custom_padding=”29px||0||false|false”][et_pb_row custom_padding=”0|0px|27px|0px|false|false” custom_margin=”20px|||” _builder_version=”3.0.93″][et_pb_column type=”4_4″ _builder_version=”3.0.47″ parallax=”off” parallax_method=”on”][et_pb_text _builder_version=”3.19.7″ text_text_color=”#f7f7f7″ text_font_size=”18px”]<\/p>\n
To demodulate 1KUNS-PF, we suggest using either the tool from radio amateur UZ7HO, SoundModem http:\/\/uz7.ho.ua\/packetradio.htm. In the “other-versions.zip” file you can find the demodulator specific to our CubeSat. Special thanks to UZ7HO for providing such a great tool.<\/p>\n
Another option is using the splendid gr-satellites repository with GNURadio https:\/\/github.com\/daniestevez\/gr-satellites, in which you will find both the telemetry and the image decoder.<\/p>\n
As of the antenna to use, when running in 9k6 baud it is difficult to demodulate the signal with an omnidirectional antenna unless the passage is quite high. The recommendation is a Yagi even roughly pointed towards the CubeSat.<\/p>\n
You will find that we transmit a lot of packets over Europe and Kenya, so if you are around you will receive much more than the beacon!<\/p>\n
The signal properties are as follow:
Frequency: 437.300MHz
Modulation: GMSK
Baud Rate: 9600bps, fallback to 1200bps
Beacon Frequency: 1\/15s
Telemetry Frequency: On request
Polarization: Any (can be RHCP, LHCP, Vertical or Horizontal depending on how 1KUNS-PF is oriented!)<\/p>\n
More info on the satellite on https:\/\/db.satnogs.org\/satellite\/43466\/ as well.<\/p>\n
Images:
The images are JPEG encoded. They have a two-byte preamble that indicates what number packet is being transmitted, after which 128 bytes of JPEG encoded data follow. We usually do not transmit the first 4 packets (0 to 3) because they always contain the same bytes, in order to save time:<\/p>\n
FF D8 FF E0 00 10 4A 46 49 46 00 01 01 01 00 00 00 00 00 00 FF DB 00 43 00 0C 08 09 0B 09 08 0C 0B 0A 0B 0E 0D 0C 0E 12 1E 14 12 11 11 12 25 1A 1C 16 1E 2C 26 2E 2D 2B 26 2A 29 30 36 45 3B 30 33 41 34 29 2A 3C 52 3D 41 47 4A 4D 4E 4D 2F 3A 55 5B 54 4B 5A 45 4C 4D 4A FF DB 00 43 01 0D 0E 0E 12 10 12 23 14 14 23 4A 32 2A 32 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A FF C4 00 1F 00 00 01 05 01 01 01 01 01 01 00 00 00 00 00 00 00 00 01 02 03 04 05 06 07 08 09 0A 0B FF C4 00 B5 10 00 02 01 03 03 02 04 03 05 05 04 04 00 00 01 7D 01 02 03 00 04 11 05 12 21 31 41 06 13 51 61 07 22 71 14 32 81 91 A1 08 23 42 B1 C1 15 52 D1 F0 24 33 62 72 82 09 0A 16 17 18 19 1A 25 26 27 28 29 2A 34 35 36 37 38 39 3A 43 44 45 46 47 48 49 4A 53 54 55 56 57 58 59 5A 63 64 65 66 67 68 69 6A 73 74 75 76 77 78 79 7A 83 84 85 86 87 88 89 8A 92 93 94 95 96 97 98 99 9A A2 A3 A4 A5 A6 A7 A8 A9 AA B2 B3 B4 B5 B6 B7 B8 B9 BA C2 C3 C4 C5 C6 C7 C8 C9 CA D2 D3 D4 D5 D6 D7 D8 D9 DA E1 E2 E3 E4 E5 E6 E7 E8 E9 EA F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FF C4 00 1F 01 00 03 01 01 01 01 01 01 01 01 01 00 00 00 00 00 00 01 02 03 04 05 06 07 08 09 0A 0B FF C4 00 B5 11 00 02 01 02 04 04 03 04 07 05 04 04 00 01 02 77 00 01 02 03 11 04 05 21 31 06 12 41 51 07 61 71 13 22 32 81 08 14 42 91 A1 B1 C1 09 23 33 52 F0 15 62 72 D1 0A 16 24 34 E1 25 F1 17 18 19 1A 26 27 28 29 2A 35 36 37 38 39 3A 43 44 45 46 47 48 49 4A 53 54 55 56 57 58 59 5A 63 64 65 66 67 68 69 6A 73 74 75<\/p>\n
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To demodulate 1KUNS-PF, we suggest using either the tool from radio amateur UZ7HO, SoundModem http:\/\/uz7.ho.ua\/packetradio.htm. In the “other-versions.zip” file you can find the demodulator specific to our CubeSat. Special thanks to UZ7HO for providing such a great tool.Another option is using the splendid gr-satellites repository with GNURadio https:\/\/github.com\/daniestevez\/gr-satellites, in which you will find both the […]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","ngg_post_thumbnail":0,"footnotes":""},"wf_page_folders":[24],"class_list":["post-1447","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.s5lab.space\/index.php\/wp-json\/wp\/v2\/pages\/1447","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.s5lab.space\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.s5lab.space\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.s5lab.space\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.s5lab.space\/index.php\/wp-json\/wp\/v2\/comments?post=1447"}],"version-history":[{"count":17,"href":"https:\/\/www.s5lab.space\/index.php\/wp-json\/wp\/v2\/pages\/1447\/revisions"}],"predecessor-version":[{"id":2075,"href":"https:\/\/www.s5lab.space\/index.php\/wp-json\/wp\/v2\/pages\/1447\/revisions\/2075"}],"wp:attachment":[{"href":"https:\/\/www.s5lab.space\/index.php\/wp-json\/wp\/v2\/media?parent=1447"}],"wp:term":[{"taxonomy":"wf_page_folders","embeddable":true,"href":"https:\/\/www.s5lab.space\/index.php\/wp-json\/wp\/v2\/wf_page_folders?post=1447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}