Amateur Satellite Summary

Fuji-OSCAR-20

Satellite Summary

Name: Fuji-OSCAR-20 aka JAS-1b and Fuji-2
Callsign: 8J1JBS
NASA Catalog Number: 20480
Launched: February 7, 1990
Launch vehicle: Japanese H-I
Launch location: Tanegashima Space Center of NASDA, Tanegashima Island, Japan
Weight: 50 kg
Orbit: Polar LEO (Low Earth Orbit)
Inclination: 99 degrees
Size: 44 cm wide x 47 cm high
Period: 112 minutes

Features:

BBS Message System (digital store-and-forward)
Analog communications transponder

Beacon

435.795 MHz - CW (primary) or PSK digital (secondary)
435.910 MHz - PSK digital

Digital Transponder - Mode JD

Uplinks: AFSK (FM) 1200 bps, AX.25, Manchester

145.850 MHz
145.870 MHz
145.890 MHz
145.910 MHz

Downlink: BPSK 1200 bps

435.910 MHz

Analog Transponder - Mode JA -- Note: FO-20 is permanently in the analog mode.

Uplink: 145.900 - 146.000 MHz
Downlink: 435.795 - 435.900 MHz (inverted)

Status: Semi-Operational - Mode JA only

The latest information is available from: Weekly Satellite Report (WSR)

Description

For an update on the status of FO-20, see the JARL Present Status of Fuji-OSCAR 20 web page.

For a description of FO-20, read John Magliacane's, KD2BD, Spotlight On: Fuji-2/OSCAR-20 originally published in The AMSAT Journal.

For more information about FO-20 and 29 visit the Japan Amateur Radio League (English version) and the National Space Development Agency of Japan (English version) web pages.

References

JAS-1 Handbook, JARL, August 1985. English translation available from Project OSCAR, PO Box 1136, Los Altos, CA 94023.
V. Riportella, "Introducing Japanese Amateur Satellite number One (JAS-1)," QST, Nov 1986, pp 66-67.
"Introduction of JAS-1b," by JARL, QEX, Sep 1989, pp 8-11.
Joe Kasser, "The Fuji-OSCAR-20 Spacecraft," The AMSAT Journal, Vol. 13, No. 3, July 1990, p. 7
JR1NVU, "The Telemetry Formats of JAS-1b/Fuji-OSCAR 20," The AMSAT Journal, Vol. 13, No. 4, Sep 1990, p. 20.
John A. Magliacane, "Spotlight On: Fuji-2/OSCAR-20," The AMSAT Journal, Vol. 15 No. 5, Nov/Dec 1992, p. 17.
Martin Davidoff, The Satellite Experimenter's Handbook, 2nd edition, The American Radio Relay League, Newington, CT., 1990.
Mike Crisler, PACSAT Beginner's Guide, AMSAT

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Last update May 31, 2003 - N7HPR