OSCAR 7
Mission information
Name
OSCAR 7
Alternate Names
AO-7, AMSAT OSCAR 7
Satellite ID
HHSS-6325-1344-4603-7774
NORAD ID
7530
Website
https://www.amsat.org/two-way-satellites/ao-7/
Country of Origin

United States of America

Status
Satellite alive
Operational

Satellite is in orbit and operational

Image
OSCAR 7
Mission timeline
Launch Date
1974-11-15T00:00:00+00:00
Description

AMSAT-OSCAR 7 was launched November 15, 1974 by a Delta 2310 launcher from Vandenberg Air Force Base, Lompoc, California. AMSAT-OSCAR 7 contains two basic experimental repeater packages, redundant command systems, two experimental telemetry systems, and a store-and-forward message storage unit. The spacecraft is solar powered, weighs 65 pounds, and had a three-year anticipated lifetime at the time it was launched, but it has far outlived this expectation. It contains beacons on 29.50, 145.975, 435.10 and 2304.1 MHz. AO-7 became non-operational in mid 1981 due to battery failure . In 2002 one of the shorted batteries became an open circuit and now the spacecraft is able to run off solar panels.

SatNOGS Links
Network Observations
Mode U TLM Beacon
Operational
Copy UUID Citation
Type
Transmitter
Downlink Mode
CW
Downlink Frequency
435.100 MHz
Downlink Drifted
435.106 MHz
Updated by fredy and reviewed on 2019-06-14 14:06 by fredy
Mode U/V (B) TLM Beacon
Operational
Copy UUID Citation
Type
Transmitter
Downlink Mode
CW
Downlink Frequency
145.977 MHz
Downlink Drifted
145.973 MHz
Updated by fredy and reviewed on 2019-06-14 14:15 by fredy
Mode V/A (A) Lin SSB
Operational
Copy UUID Citation
Type
Transponder
Service
Amateur
Downlink Mode
USB
Downlink Frequency
29.400 MHz
Uplink Mode
USB
Downlink High
29.500 MHz
Uplink Frequency
145.850 MHz
Uplink High
145.950 MHz
Updated by fredy and reviewed on 2019-11-07 00:01 by fredy
Mode V/A (A) Lin CW
Operational
Copy UUID Citation
Type
Transponder
Downlink Mode
CW
Downlink Frequency
29.400 MHz
Uplink Mode
CW
Downlink High
29.500 MHz
Uplink Frequency
145.850 MHz
Uplink High
145.950 MHz
Updated by fredy and reviewed on 2019-11-07 00:01 by fredy
Mode U/V (B) Lin
Operational
Copy UUID Citation
Type
Transponder
Downlink Mode
USB
Downlink Frequency
145.925 MHz
Uplink Mode
LSB
Downlink High
145.975 MHz
Uplink Frequency
432.125 MHz
Uplink High
432.175 MHz
Inverted
Yes
Updated by frank and reviewed on 2020-08-08 21:54 by PE0SAT
Mode V/A (A) TLM Beacon
Operational
Copy UUID Citation
Type
Transmitter
Service
Amateur
Downlink Mode
CW
Downlink Frequency
29.502 MHz
Updated by wd4va and reviewed on 2022-03-17 14:25 by fredy
13 cm Beacon (40mW)
Operational
Copy UUID Citation
Type
Transmitter
Service
Amateur
Downlink Mode
CW
Downlink Frequency
2304.100 MHz
Updated by ENSFNM and reviewed on 2022-11-29 08:04 by fredy
Most Recent Observers (last 24h)
Observer Latest Data
PF_DE_UHF_X_DIPOLE-JN48iv 2025-07-08 16:36:28 UTC
Data Frames Decoded - 30 Days
There is no decoded data for this satellite in the last 30 days.
No Decoders Found
Help us develop a decoder, you can find instructions at this wiki link
Orbital Elements
Latest Two-Line Element (TLE)
TLE Source
Space-Track.org
TLE Updated
2025-07-08 19:02:33 UTC
TLE Set 
1 07530U 74089B   25189.55590662 -.00000029  00000-0  11050-3 0  9998
2 07530 101.9931 194.1284 0012617  67.7239  97.8811 12.53690033317457
Satellite Suggestion History
Transmitter Suggestion History