Satellite Summary

Name: Mexico-OSCAR-30 aka UNAMSAT-B
NASA Catalog Number: 24305
Launched: September 5, 1996
Launch vehicle: Russian COSMOS
Launch location: Plesetsk, Russia
Weight: 10.7 kg.
Orbit: Polar LEO (Low Earth Orbit)
Inclination: 83 degrees
Size: 150 x 150 x 150 mm

Digital Transponder - Mode JD

Features: Status: Non-Operational


MO-30 is the twin spacecraft of UNAMSAT-1 which was launched from Plesetsk, Russia, on March 28th, 1995. The basic spacecraft was of the same design as the other AMSAT Microsats (including LUSAT, DOVE, WEBERSAT, ITAMSAT and EYESAT). Unfortunately, the launch failed and destroyed the satellite along with TechSat, an amateur satellite built in Israel by the Technion Institute of Technology in Haifa, Israel (see TechSat-1b).

The UNAMSAT spare parts were flown late last summer on a different launch vehicle, also from Plesetsk. The satellite was deposited in orbit and transmitted telemetry for about one day. Unfortunately, the launch was very cold, with the satellite separating from the launcher with a temperature of about -30C since the satellite was under the launcher shroud for a couple of hours. Apparently, the crystal oscillator in the uplink receiver's 1st LO never started oscillating, and the satellite was totally deaf. Because there was no functioning uplink, battery charging parameters suitable for the unanticipated cold temperature could not be loaded, and the satellite ran out of power. Later attempts to revive it have been unsuccessful. (thanks W3IWI).

MO-30 was constructed at the National University of Mexico (UNAM) in Mexico City by XE1TU and his students. The UNAMSAT web pages are


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Last update January 31, 1999 - N7HPR