 LUSAT-OSCAR 19
(LUSAT)
Spacecraft Summary
| OSCAR Designation: |
LUSAT-OSCAR 19 |
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Oscar Number: |
LO-19 |
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| International Designator: |
1990-005G |
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Norad Number: |
20442 |
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| Common Name: |
LUSAT |
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Satellite Type: |
Microsatellite |
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| Launch Date: |
22 January, 1990 |
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Launch Location: |
French Guiana |
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| Launch Vehicle: |
Ariane 4 |
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Apogee: |
794.00 |
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| Perigee: |
776.00 |
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Inclination: |
98.20 |
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| Period: |
100.56 |
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Weight: |
0.000 Kg |
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| Organization: | AMSAT Argentina |
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Frequency Information
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| Mode V/U (J) PacSat BBS: Non-Operational |
| Uplink: |
145.8400 MHz FSK 1200 BPS |
| Uplink: |
145.8600 MHz FSK 1200 BPS |
| Uplink: |
145.8800 MHz FSK 1200 BPS |
| Uplink: |
145.9000 MHz FSK 1200 BPS |
| Downlink |
437.1500 MHz FSK 1200 BPS |
| |
| Mode U TLM Beacon: Operational |
| Downlink |
437.1250 MHz CW |
| Callsign(s)| Broadcast: | LUSAT-11 | | BBS: | LUSAT-12 |
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Current Keplerian Elements
LO-19
1 20442U 90005G 09325.46731148 .00000001 00000-0 15676-4 0 6671
2 20442 98.2647 293.5413 0012749 61.6147 298.6317 14.32073539 35826
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Weekly Satellite Report
The CW beacon went silent October 21, 2009.
* The CW beacon is sending eight telemetry channels and one status channel on 437.126 MHz.
* No BBS service is available.
* The digipeater is not active.
General information and telemetry samples can be found at:
www.telecable.es/personales/ea1bcu |
Detailed Description
LUSAT-OSCAR-19 was coordinated by AMSAT Argentina, and is a packet radio store-and-forward spacecraft much the same as AMSAT-OSCAR-16. The only difference between the two satellites is that AO-16 supports an S-Band beacon in addition to the mailbox, while LO-19 has 70-cm CW beacon.
The LUSAT CW beacon transmits slightly modified CW on a frequency of 437.127 MHz with about 750 mW of power. CW is sent at 12 words per minute and consists of telemetry information allowing simple spacecraft telemetry analysis with a minimum of ground station radio equipment. The Morse telegraphy sent by the CW beacon is modified in such a way that multiple dashes in numeric data is sent as a single dash (1 = .-, 2 = ..-, etc.).
Being essentially identical to PACSAT, LUSAT is often used as test bed for updated on-board computer software before AO-16 is re-loaded. If all goes well with the update on AO-16, then LUSAT is re-loaded with the new operating software.
Microsat operating schedules are frequently made known through unnumbered information UI packet frames transmitted by the microsats. These short beacon announcements are usually written by one or more of the spacecraft controllers and are used to inform microsat users of the latest images on WEBERSAT, the status of LUSAT's CW beacon, when low-power "Experimenter Days" are scheduled for PACSAT, or when speech software is being uploaded on DOVE.
"Pacsat-class" Amateur satellites are revolutionizing Amateur Radio communications as we head through the "information age". Store-and-forward satellites along with automated Pacsat gateways are improving terrestrial packet radio throughput immensely, and are reducing the workload on the HF packet networks.
The success of the Microsats has influenced the future and the direction of OSCAR satellites leading us into the future through pathways we never thought were possible just a few years ago. At the present time, several new Microsats are in the making. Finland Amateurs are busy completing "HutSat", Italians are preparing "ITAmsat", and Israel is expected to launch its first OSCAR known as "TechSat" in the not too distant future.
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Reference Documents:
- D. Conners, "The PACSAT Project," ARRL Amateur Radio Second Computer Networking Conference, pp. 1-3, March 19, 1983.
- T. Clark, "AMSAT's Microsat/Pacsat Program," Proceedings of the AMSAT-NA Sixth Space Symposium, Atlanta, GA, pp. 41-47, Nov 1988, ARRL.
- L. Johnson and C. Green, "Microsat Project - Flight CPU Hardware," Proceedings of the AMSAT-NA Sixth Space Symposium, Atlanta, GA, pp. 104-106, Nov 1988, ARRL.
- H. Price and R. McGwier, "PACSAT Software," Proceedings of the AMSAT-NA Sixth Space Symposium, Atlanta, GA, pp. 145-149, Nov 1988, ARRL.
- T. Clark, C. Duncan, J. King, B. McGwier, "The First Flock of Microsats," The AMSAT Journal, May 1989, pp 3-10.
- D. Loughmiller and B. McGwier, "Microsat: The Next Generation of OSCAR Satellites," Part 1, QST, May 1989, pp 37-40; Part 2, QST, Jun 1989, pp 53-54.
- Doug Loughmiller, "Successful OSCAR Launch Ushers in the 90's," QST, Apr 1990, p. 52.
- Six for the Price of One - Part I," The AMSAT Journal, Vol. 13, No. 1, Mar 1990, p. 1; Part II: The AMSAT Journal, Vol. 13, No. 2, May 1990, p. 1.
- John A. Magliacane, "Spotlight On: The Microsats," The AMSAT Journal, Vol. 15, No. 4, Sep/Oct 1992
- 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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