Eyesat-1 / OSCAR 27
Mission typeAmateur radio satellite
COSPAR ID1993-061C
SATCAT no.22825[1]
Websitewww.ao27.org[dead link]
Spacecraft properties
ManufacturerInterferometrics Inc.
Launch mass11.8 kg (26 lb)
Dimensions15 cm × 15 cm × 15 cm (5.9 in × 5.9 in × 5.9 in)
Start of mission
Launch date26 September 1993, 01:45 UTC[2]
RocketAriane-40 V59
Launch siteKourou ELA-2
End of mission
Last contact5 December 2012
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Perigee altitude794 km (493 mi)[2]
Apogee altitude823 km (511 mi)[2]
Period101 minutes[2]
Epoch26 September 1993[2]
← OSCAR 26

Eyesat-1 is an American experimental communications microsatellite with an store-dump payload. The mission of Eyesat-1 was experimental monitoring of mobile industrial equipment. Eyesat-1 has provided the National Oceanic and Atmospheric Administration in Silver Spring, Maryland, with communication services to the South Pole. Eyesat-1 carries an FM repeater for Amateur Radio Research and Development Corporation (AMRAD) called AMRAD OSCAR 27 or OSCAR 27.[2]

Eyesat-1 was launched on September 26, 1993 with an Ariane 4 rocket at Guiana Space Centre, Kourou, French Guiana, along with SPOT-3, Stella, Healthsat-2, KITSAT-2, Itamsat and PoSAT-1.

After 19 years of operation, the satellite failed on December 5, 2012.[citation needed]

In 2020, the satellite was recovered, and its FM repeater became intermittently operational.[3]



  1. ^ a b c n2yo.com. "EYESAT 1". Retrieved 13 February 2020.
  2. ^ a b c d e f g h NASA Goddard Space Flight Center. "EYESAT 1". NSSDCA Master Catalog. Retrieved 13 February 2020.
  3. ^ "AO-27 Returns from the Dead". AMSAT. 24 May 2020. Retrieved 26 September 2020.