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Oscar Echo

Also called AO-51, Amsat Oscar-E, Amsat Echo


Designation 28375 / 04025K
Launch date 29 Jun 2004
Country of origin United States
Mission Telecommunications
Perigee/Apogee 700 km
Inclination 98.3°
Period 99 min
Launch vehicle Dnepr #4

External resources

sat-index articles


Technical data


Prime contractor  
Mass at launch 12 kg
Mass in orbit  
Dimension 25.4 cm cube
Solar array  
DC power  
Design lifetime  

FM voice repeater: 145.920 MHz uplink, 435.225 MHz downlink
Digital mode: 9600 baud, 145.860 MHz uplink; 435.150 MHz downlink

Experimantal modes are scheduled each Wednesday. Many modes are supported.

The satellited as 4 VHF receivers, 1 multi-band multi-mode receiver (SQRX), 2 UHF transmitters, 6 demodulators and 2 modulators and RF switching.

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