Mission typeResearch/amateur radio
COSPAR ID2013-015B[1]
SATCAT no.39131[1]
Websitehttp://opensat.cc/ (archived)
Spacecraft properties
Spacecraft type1U CubeSat
ManufacturerHome made
Launch mass950g [2]
Dimensions10 centimetres (3.9 in) cube
Start of mission
Launch date19 April 2013, 10:00 (2013-04-19UTC10Z) UTC
RocketSoyuz 2-1a
Launch siteBaikonur 31/6
End of mission
Decay date30 June 2013
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Semi-major axis6,778 kilometres (4,212 mi)[3]
Perigee altitude263.0 kilometres (163.4 mi)[3]
Apogee altitude552.8 kilometres (343.5 mi)[3]
Inclination64.9 degrees[3]
Period92.6 minutes[3]
Epoch14 May 2013[3]

OSSI-1 (standing for Open Source Satellite Initiative-1) is 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 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 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 is 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 has 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. Retrieved 14 May 2013.
  2. ^ a b "OSSI-1". National Space Science Data Centre. Retrieved 14 May 2013.
  3. ^ a b c d e f "OSSI 1". REAL TIME SATELLITE TRACKING. Retrieved 14 May 2013.
  4. ^ a b c d "OSSI-1". Amsat.uk. Retrieved 14 May 2013.
  5. ^ "South Korean artist has high hopes for his homemade satellite". BBC News. 27 July 2012. Retrieved 14 May 2013.
  6. ^ "Alpha Geek: Hojun Song, DIY Satellite Builder". Wired. 30 August 2010. Retrieved 14 May 2013.
  7. ^ a b c "Open Source Satellite Initiative". OSSI. Retrieved 14 May 2013.
  8. ^ "OSSI-1". dk3wn. 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. ^ https://github.com/ossicode

External links

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