Spacecraft Summary
NON OPERATIONAL
| OSCAR
Designation: |
AMSAT-OSCAR
51 |
|
Oscar
Number: |
AO-51 |
|
| International
Designator: |
2004-025K |
|
Norad
Number: |
28375 |
|
| Common
Name: |
Echo |
|
Alternate
Name: |
OSCAR-E |
|
| Satellite
Type: |
Microsatellite |
|
Launch
Date: |
28 June,
2004 |
|
| Launch
Location: |
Baikonur
Cosmodrome |
|
Launch
Vehicle: |
Dnepr |
|
| Apogee: |
818.00 |
|
Perigee: |
696.00 |
|
| Inclination: |
99.97 |
|
Period: |
99.97 |
|
| Dimensions: |
~25cm cube |
|
Weight: |
11.140 Kg |
|
| Organization: |
AMSAT-NA |
Frequency
Information
| Mode V/U (J) FM Voice
Repeater (QRP): Non-Operational |
| Uplink: |
145.8800 MHz FM |
| Downlink |
435.1500 MHz FM |
See AMSAT for latest Operational OSCAR
Satellite Status Summary
http://www.amsat.org/amsat-new/satellites/status.php
November 29, 2011
It is with a heavy heart I report that AO-51 has ceased transmission
and is not responding to commands. The last telemetry data indicated
that the third of six batteries was approaching failure to short,
and observations indicate the voltage from three cells is
insufficient to power the UHF transmitters. The IHU may continue to
be operative. Initial tests with the S band transmitter were also
not positive, although more attempts are in order. We have tried
leaving the satellite in an expected state where if voltages climb
high enough, the 435.150 transmitter may possibly be heard.
The command team will regularly attempt communications with the
satellite over the coming months (and years). There is always the
possibility that a cell will open and we could once again talk to
our friend while illuminated. Thanks to all who helped fund, design,
build, launch, command, and operate AO-51. It's 7 year mission has
been extraordinary. Please support AMSAT's Fox-1 project, and other
AMSAT projects worldwide with your time and money.
For the AO-51 Command Team,
73, Drew KO4MA
AMSAT-NA VP Operations
|
