Amateur radio
NORAD ID: 28375
Int'l Code: 2004-025K
Perigee: 701.5 km
Apogee: 822.5 km
Inclination: 98.2 °
Period: 99.9 minutes
Semi major axis: 7132 km
Launch date: June 29, 2004
Source: United States (US)
Comments: Amsat-Echo, also known as AMSAT Oscar-E or AO-51, is an American amateur communications microsatellite satellite (10 kg) that relays amateur transmissions. AO-51 contains an FM repeater with both a 144 MHz and 1.2 GHz uplink and 435 MHz and 2.4 GHz downlinks. Additionally AO-51 contains a digital subsystem that transmits TLM on 70cm and provides complete PACSAT BBS that can be configured on both V and S band uplinks. There is also a 10 meter PSK uplink.
Two Line Element Set (TLE):
1 28375U 04025K 13138.94652328 .00000269 00000-0 92605-4 0 5608
2 28375 098.1988 095.5835 0084813 104.5675 297.0215 14.41111836467123
Source: AFSPC
NASA's NSSDC Master Catalog entry for AMSAT ECHO
