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 Satellite Detail - Dove-OSCAR 17
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Photo of Dove-OSCAR 17

Dove-OSCAR 17
(Dove)


Spacecraft Summary

OSCAR Designation:  Dove-OSCAR 17     Oscar Number:  DO-17    
International Designator:  1990-005E     Norad Number:  20440    
Common Name:  Dove     Satellite Type:  Microsatellite    
Launch Date:  22 January, 1990     Launch Location:  French Guiana    
Launch Vehicle:  Ariane 4     Apogee:  793.00    
Perigee:  777.00     Inclination:  98.20    
Period:  100.56     Weight:  0.000 Kg    
Organization: AMSAT Brazil


Frequency Information
 
Mode V Telemetry: Non-Operational
Downlink 145.0000 MHz AFSK 1200 BPS
Downlink 145.8240 MHz AFSK 1200 BPS
 
Mode S Telemetry: Non-Operational
Downlink 2401.2210 MHz AFSK 1200 BPS

Current Keplerian Elements

DO-17
1 20440U 90005E   09325.40350339 -.00000005  00000-0  13521-4 0  4706
2 20440  98.2766 291.1733 0011848  60.9731 299.2641 14.32143855 35797


Detailed Description

DOVE was sponsored by AMSAT-Brazil and lead by Dr. Junior Torres DeCastro, PY2BJO. DOVE, an acronym for Digital Orbiting Voice Encoder, carried hardware capable of reproducing digitized speech, or controlling a Votrax speech synthesizer. However, due to hardware failures that occurred after launch, the primary mission of providing voice messages of world peace from DOVE was not been fully realized.

DOVE operated sporadically on a downlink frequency of 145.825 MHz FM, transmitting AX.25 protocol packet radio telemetry. Using 1200 bps Bell 202 style AFSK emission, DOVE-OSCAR-17 could be copied on packet radio equipment in wide use on VHF at the time. DO-17 contains no general-use uplink receivers and does not support any mailbox operations.

Regardless of the hardware malfunctions that made voice software uploads difficult for spacecraft controllers, many educators and OSCAR enthusiasts successfully captured spacecraft telemetry frames, analyzed trends in data and determined the spin rate of the satellite. These experiences, as well as AO-16 WOD analysis brought real-world sciences directly into the hands of those involved and were an invaluable teaching resource free for the asking.


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