OSSI-1 (original) (raw)

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Geocentric radio satellite

OSSI-1

OSSI 1 communications block diagram

OSSI-1 (standing for Open Source Satellite Initiative-1) was an amateur radio satellite launched in 2013 with Bion-M No.1. Bion-M was launched into orbit at 10:00 UTC on April 19, 2013, from Baikonur Cosmodrome, Kazakhstan, with 6 other small satellites, including OSSI-1. OSSI-1 detached from Bion-M at 16:15 UTC.[1][4]

OSSI-1 is the pet project of Hojun Song, a South Korean artist and amateur radio operator. He worked on it for seven years, designing and building the satellite using off-the-shelf components rather than equipment that had been certified for use in space.[4] The most expensive aspect of the project was the launch, which cost US$100,000.[4][5][6]

OSSI-1 was a 1U CubeSat with 100mm sides, weighing 950g.[2][7] It uses an Arduino microcontroller, a lithium-ion battery and a J mode UHF/VHF transceiver.[7]

The satellite had a Morse code beacon transmitting "OS0 DE OSSI1 ANYOUNG" on 145.980 MHz and 4 LED lights with a total power of 44 watts to flash Morse code messages, using an open protocol. The project developers announced on 24 April 2013 that they had not yet received a signal from the satellite and were concerned that the Two-line element set they were using to locate the satellite might be wrong.[4][7][8][9]

According to Korean amateur radio organisation KARL, Hojun Song had some difficulties launching a satellite as a private individual, connected to registering with space bodies and being allocated broadcast frequencies by the international telecoms regulator the ITU. A law requires knowledge of the launch date two years in advance which he was not able to give as he was sharing a launch with other experimental satellites. The amateur radio bands are nearly full but to use other bands would require more expensive specialist equipment and technical skills.[9] In 2011 OSSI-1 signed a contract with a French nano satellite company for a turnkey launch service in order to secure a launch date.[10]

The satellite re-entered the Earth's atmosphere on 30 June 2013. Source code for the satellite is available on GitHub.[11]

1. ^ a b c "2013-015". Zarya.Info. Archived from the original on 22 October 2013. Retrieved 14 May 2013.
2. ^ a b "OSSI-1". National Space Science Data Centre. Archived from the original on 4 June 2023. Retrieved 14 May 2013.
3. ^ a b c d e f "OSSI 1". REAL TIME SATELLITE TRACKING. Archived from the original on 4 March 2016. Retrieved 14 May 2013.
4. ^ a b c d "OSSI-1". Amsat.uk. 12 March 2013. Archived from the original on 16 June 2013. Retrieved 14 May 2013.
5. ^ "South Korean artist has high hopes for his homemade satellite". BBC News. 27 July 2012. Archived from the original on 30 May 2013. Retrieved 14 May 2013.
6. ^ "Alpha Geek: Hojun Song, DIY Satellite Builder". Wired. 30 August 2010. Archived from the original on 15 May 2013. Retrieved 14 May 2013.
7. ^ a b c "Open Source Satellite Initiative". OSSI. Archived from the original on 11 January 2014. Retrieved 14 May 2013.
8. ^ "OSSI-1". dk3wn. Archived from the original on 9 May 2013. Retrieved 14 May 2013.
9. ^ a b "INTERNATIONAL AMATEUR RADIO UNION REGION 3. FIFTEENTH REGIONAL CONFERENCE. Triennial Report from KARL (2009-2012)". KARL. 2012. Archived from the original on 2 February 2016. Retrieved 14 May 2013.
10. ^ "OSSI mandates NovaNano to secure a launch opportunity in 2012 for the first individual satellite" (PDF). OSSI. 21 June 2011. Archived from the original (PDF) on 4 March 2016. Retrieved 15 May 2013.
11. ^ "Ossicode - Overview". GitHub. Archived from the original on 2021-04-19. Retrieved 2021-02-02.

• opensat.cc website (archived)
• GitHub: ossicode