User: anonymous   Login
Location: Arnolds Mill
(42.3415°N, 73.5951°W)
Time: 10:21:07

AO-7 - Satellite Information

Spacetrack catalog number 7530
COSPAR ID 1974-089-B
Name in Spacetrack catalog OSCAR 7

Amateur radio information
AO-7 became non-operational in mid 1981 due to battery failure . In 2002 one of the shorted batteries became an open and now the spacecraft is able to run off solar panels. For this reason it is not usable in eclipse and may not be able to supply enough power to the transmitter to keep from frequency modulating the signal. When continuously illuminated, the mode will alternate between A and B every 24 hours.

Mode V/A (A) Linear Transponder (Non-Inverting):
Uplink: 145.8500 – 145.9500 MHz SSB/CW
Downlink 29.4000 – 29.5000 MHz SSB/CW

Mode V/A (A) TLM Beacon:
Downlink 29.5020 MHz CW

Mode U/V (B) Linear Transponder (Inverting):
Uplink: 432.1250 – 432.1750 MHz SSB/CW
Downlink 145.9750 – 145.9250 MHz SSB/CW

Mode U/V (B) TLM Beacon:
Downlink 145.9775 MHz CW

Mode U TLM Beacon
Downlink 435.1000 MHz CW

Source: AMSAT

Satellite Details

Orbit 1,439 x 1,459 km, 102.0°
Category Amateur radio
Country/organisation of origin United States
Mass 29 kg
Dimensions Octahedral shaped 360 mm high and 424 mm in diameter
Intrinsic brightness (Magnitude) ?


Date (UTC) 15 November 1974 17:11
Launch siteVandenberg Space Force Base,
United States
Launch vehicle Delta 2310

Links to further information
View from orbit pole