Oscar 13

Also called AO-13 or Phase 3C

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General

Designation	19216 / 88051B
Launch date	15 Jun 1988
Country of origin	United States
Mission	Telecommunications
Perigee/Apogee	809/37995 km
Inclination	57.9°
Period	686.6 min
Launch vehicle	Ariane V22

The country of origin should be Germany as the satellite project was led by AMSAT-DL.

Much improved brother to Oscar 10: it has the ability to automatically select transponders for each mode at different points in its orbit. However problems occured: it had a RUDAK experiment onboard that failed shortly after launch. Also, in June 1993, the 70 cm downlink transmitter ceased to function, putting an end to Mode J and L operation.

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End of life

Decay

6 Dec 1996

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External resources

http://www.amsat.org/amsat/sats/n7hpr/ao13.html

Technical data

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Specifications

Prime contractor
Platform
Mass at launch	140 kg
Mass in orbit	90 kg
Dimension
Solar array
Stabilization	Magnetorquer
DC power	50 W (NiCd battery)
Design lifetime

Payload power: 145 MHz - 50 W; 435 MHz - 111 W; 2350 MHz - 1.25 W

general beacon	145.812 mhz (psk, cw, rtty)
engineering beacon	145.985 mhz (psk, cw, rtty)
mode b uplink	435.423 - 435.573 mhz (ssb, cw)
mode b downlink	145.825 - 145.975 mhz (ssb, cw, inverting)
general beacon	435.651 mhz (psk, rtty)
engineering beacon	435.677 mhz (psk, rtty)
mode l uplink	1269.351 - 1269.641 mhz (ssb, cw)
mode l downlink	435.715 - 436.005 mhz (ssb, cw, inverting)
mode j uplink	144.423 - 144.473 mhz (ssb, cw)
mode j downlink	435.940 - 435.990 mhz (ssb, cw, inverting)
beacon	2400.325 mhz (psk, rtty)
beacon	2400.664 mhz (psk, rtty)
mode s uplink	435.603 - 435.639 mhz (ssb, cw, fm)
mode s downlink	2400.711 - 2400.747 mhz (ssb, cw, fm)
rudak uplink	1269.710 mhz (inoperative)
rudak downlink	435.677 mhz (inoperative)

The beacon output alternates between CW, 50 baud RTTY and 400 bps PSK. Beacon transmissions contain satellite engineering data and bulletins from ground control.

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