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Domain: amsat-dl.org
Stories and comments across the archive that link to amsat-dl.org.
Stories · 11
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VOYAGER 1 Signal Received by AMSAT-DL Group
Anonymous Coward writes " Space probe VOYAGER 1 successfully received. On March 31st, 2006 an AMSAT-DL /IUZ team received a signal from the American space probe VOYAGER 1 with the 20 m antenna in Bochum. The distance was 14.7 billion km. This is a new record for AMSAT-DL and IUZ Bochum. The received signal was clearly identified through means of doppler shift and position in the sky. The receive frequency was exactly measured and compared with the information provided by NASA. This distance equals approximately 98 times the distance between Earth and Sun. VOYAGER 1 is the most distant object ever built by mankind. This again proves the superior performance of the Bochum antenna. Most probably this is the first time Voyager 1 has been received by radio amateurs. VOYAGER 1 was launched on 5. September 1977 by NASA. It transmitted the first close-up pictures of Jupiter and Saturn. In 2004 VOYAGER 1 passed the Termination Shock Region, where the solar wind mixes with interstellar gas. VOYAGER 1 today is still active, measuring the interstellar magnetic field. The following radio amateurs were involved: Freddy de Guchteneire, ON6UG James Miller, G3RUH Hartmut Paesler, DL1YDD Achim Vollhardt, DH2VA/HB9DUN Special thanks to Thilo Elsner, DJ5YM of the IUZ Bochum, Roger Ludwig of Jet Propulsion Laboratory (JPL), Pasadena USA and the Deep Space Network Tracking Station in Madrid, Spain for their cooperation. " -
VOYAGER 1 Signal Received by AMSAT-DL Group
Anonymous Coward writes " Space probe VOYAGER 1 successfully received. On March 31st, 2006 an AMSAT-DL /IUZ team received a signal from the American space probe VOYAGER 1 with the 20 m antenna in Bochum. The distance was 14.7 billion km. This is a new record for AMSAT-DL and IUZ Bochum. The received signal was clearly identified through means of doppler shift and position in the sky. The receive frequency was exactly measured and compared with the information provided by NASA. This distance equals approximately 98 times the distance between Earth and Sun. VOYAGER 1 is the most distant object ever built by mankind. This again proves the superior performance of the Bochum antenna. Most probably this is the first time Voyager 1 has been received by radio amateurs. VOYAGER 1 was launched on 5. September 1977 by NASA. It transmitted the first close-up pictures of Jupiter and Saturn. In 2004 VOYAGER 1 passed the Termination Shock Region, where the solar wind mixes with interstellar gas. VOYAGER 1 today is still active, measuring the interstellar magnetic field. The following radio amateurs were involved: Freddy de Guchteneire, ON6UG James Miller, G3RUH Hartmut Paesler, DL1YDD Achim Vollhardt, DH2VA/HB9DUN Special thanks to Thilo Elsner, DJ5YM of the IUZ Bochum, Roger Ludwig of Jet Propulsion Laboratory (JPL), Pasadena USA and the Deep Space Network Tracking Station in Madrid, Spain for their cooperation. " -
Amateur Mars Satellite
Hobbyspacer writes "The German AMSAT-DL group recently announced formal approval of the Phase 5-A project to send a spacecraft to Mars in the 2007 or 2009 launch window. The spacecraft will use the same structure as AO-40 (formerly Phase 3-D) that was launched into earth orbit in the fall of 2000. Like AO-40 the Mars probe will piggyback on an Ariane 5 launch and use the same 400 N propulsion system. (I expect they will solve the problem that caused the engine misfiring that nearly destroyed the spacecraft.) The Phase 3-E project was also approved to follow up AO-40 and to test various techniques and technologies for the Mars mission. The document P5A-to-Mars!(712k pdf) describes the technical challenges and possible solutions for such an ambitious mission. AO-40 cost several million dollars and the Mars probe should cost considerably more, requiring they obtain funds outside of AMSAT members and the ham radio community. The long list, though, of spectacular contributions made by AMSAT to the development of micro sats and space communications gives the program high credibility." -
Amateur Mars Satellite
Hobbyspacer writes "The German AMSAT-DL group recently announced formal approval of the Phase 5-A project to send a spacecraft to Mars in the 2007 or 2009 launch window. The spacecraft will use the same structure as AO-40 (formerly Phase 3-D) that was launched into earth orbit in the fall of 2000. Like AO-40 the Mars probe will piggyback on an Ariane 5 launch and use the same 400 N propulsion system. (I expect they will solve the problem that caused the engine misfiring that nearly destroyed the spacecraft.) The Phase 3-E project was also approved to follow up AO-40 and to test various techniques and technologies for the Mars mission. The document P5A-to-Mars!(712k pdf) describes the technical challenges and possible solutions for such an ambitious mission. AO-40 cost several million dollars and the Mars probe should cost considerably more, requiring they obtain funds outside of AMSAT members and the ham radio community. The long list, though, of spectacular contributions made by AMSAT to the development of micro sats and space communications gives the program high credibility." -
Amateur Mars Satellite
Hobbyspacer writes "The German AMSAT-DL group recently announced formal approval of the Phase 5-A project to send a spacecraft to Mars in the 2007 or 2009 launch window. The spacecraft will use the same structure as AO-40 (formerly Phase 3-D) that was launched into earth orbit in the fall of 2000. Like AO-40 the Mars probe will piggyback on an Ariane 5 launch and use the same 400 N propulsion system. (I expect they will solve the problem that caused the engine misfiring that nearly destroyed the spacecraft.) The Phase 3-E project was also approved to follow up AO-40 and to test various techniques and technologies for the Mars mission. The document P5A-to-Mars!(712k pdf) describes the technical challenges and possible solutions for such an ambitious mission. AO-40 cost several million dollars and the Mars probe should cost considerably more, requiring they obtain funds outside of AMSAT members and the ham radio community. The long list, though, of spectacular contributions made by AMSAT to the development of micro sats and space communications gives the program high credibility." -
Amateur Mars Satellite
Hobbyspacer writes "The German AMSAT-DL group recently announced formal approval of the Phase 5-A project to send a spacecraft to Mars in the 2007 or 2009 launch window. The spacecraft will use the same structure as AO-40 (formerly Phase 3-D) that was launched into earth orbit in the fall of 2000. Like AO-40 the Mars probe will piggyback on an Ariane 5 launch and use the same 400 N propulsion system. (I expect they will solve the problem that caused the engine misfiring that nearly destroyed the spacecraft.) The Phase 3-E project was also approved to follow up AO-40 and to test various techniques and technologies for the Mars mission. The document P5A-to-Mars!(712k pdf) describes the technical challenges and possible solutions for such an ambitious mission. AO-40 cost several million dollars and the Mars probe should cost considerably more, requiring they obtain funds outside of AMSAT members and the ham radio community. The long list, though, of spectacular contributions made by AMSAT to the development of micro sats and space communications gives the program high credibility." -
Amateur Mars Satellite
Hobbyspacer writes "The German AMSAT-DL group recently announced formal approval of the Phase 5-A project to send a spacecraft to Mars in the 2007 or 2009 launch window. The spacecraft will use the same structure as AO-40 (formerly Phase 3-D) that was launched into earth orbit in the fall of 2000. Like AO-40 the Mars probe will piggyback on an Ariane 5 launch and use the same 400 N propulsion system. (I expect they will solve the problem that caused the engine misfiring that nearly destroyed the spacecraft.) The Phase 3-E project was also approved to follow up AO-40 and to test various techniques and technologies for the Mars mission. The document P5A-to-Mars!(712k pdf) describes the technical challenges and possible solutions for such an ambitious mission. AO-40 cost several million dollars and the Mars probe should cost considerably more, requiring they obtain funds outside of AMSAT members and the ham radio community. The long list, though, of spectacular contributions made by AMSAT to the development of micro sats and space communications gives the program high credibility." -
Amateur Mars Satellite
Hobbyspacer writes "The German AMSAT-DL group recently announced formal approval of the Phase 5-A project to send a spacecraft to Mars in the 2007 or 2009 launch window. The spacecraft will use the same structure as AO-40 (formerly Phase 3-D) that was launched into earth orbit in the fall of 2000. Like AO-40 the Mars probe will piggyback on an Ariane 5 launch and use the same 400 N propulsion system. (I expect they will solve the problem that caused the engine misfiring that nearly destroyed the spacecraft.) The Phase 3-E project was also approved to follow up AO-40 and to test various techniques and technologies for the Mars mission. The document P5A-to-Mars!(712k pdf) describes the technical challenges and possible solutions for such an ambitious mission. AO-40 cost several million dollars and the Mars probe should cost considerably more, requiring they obtain funds outside of AMSAT members and the ham radio community. The long list, though, of spectacular contributions made by AMSAT to the development of micro sats and space communications gives the program high credibility." -
GPS Test Successful From Outer Space
An anonymous reader writes: "AMSAT reports that the GPS experiment on the international amateur radio spacecraft AO-40 has undergone successful testing." A note on the site reads in part: "This experiment supplied and sponsored by NASA, is to determine if it is possible to get positional data outside of the GPS ring of satellites. There are two GPS receivers on AO-40, the A receiver for receiving signals around apogee and the B receiver for signal reception around perigee. ... A signal on the apogee receiver from about 52 Thousand Kilometres out with good signal levels has been received, further data is being gathered and those downloaded so far are being analysed. If this experiment goes the way I expect, it will revolutionise the way we use GPS in Space. Many future HEO spacecraft will be able to take advantage of GPS for autonomous navigation and stationkeeping." This is one of the most interesting applications of GPS technology I've heard about -- nice way to reuse what was intended as a terrestrial navigation aid. -
AMSAT OSCAR 40 Sends Earth Photo
An Anonymous Coward sent in: "Some of you might remember, that the Phase 3-D Amateur satellite "AMSAT OSCAR 40", launched in November 2000 by an ARIANE 5, was almost dead after an accident with it's 400N propulsion system... However, the satellite survived and is pretty alive. Today it sent spectacular pictures from its color camera to earth from a distance of about 50.000km using the wide angle camera. The satellite provides also excellent communication on 2.4 GHz (S-Band) for radio amateurs worldwide. Pictures and status information can be found here and also here." -
Oscar-40 Ham Satellite Transmitting Again
Bruce Perens K6BP writes: "The Phase 3-D Amateur satellite, called "Oscar 40" now that it is in orbit, is back on the air. A ground station sent a reset command and a command to turn on a microwave transmitter, which worked on the first attempt. The transmitter is sending an unmodulated carrier until telemetry software is reloaded, but it's clear from the doppler shift of the signal and the loss-of-signal time as the transmitter crosses the horizon that the signal is coming from the satellite's orbit. The ground controller will now reload the flight computer software and bootstrap the main flight computer. It will take a while to reload both computers and to investigate problems with the satellite, as this is complicated by the attitude and orbit of the satellite - right now it's not actively stabilized and is only pointing the antennas toward the Earth during part of its orbit, and of course it's only above the horizon from any ground controller's perspective during part of each orbit." Read on for a bit more on this promising news.""A board of inquiry will convene to investigate the loss-of-signal incident and to change procedures to avoid another such incident with this or a future Amateur satellite. General information about the satellite can be found at www.amsat.org. The following announcement is from www.amsat-dl.org:
The Santa Claus brought AO40 back On Air! At 2000-12-25 21:45 command station Ian, ZL1AOX sent a RESET command through L-band and an initialization block to switch the S2 S-Band transmitter On. Just after the first attempt the S2 beacon came on 2401.305 MHz, Signal was about S5 to 6 which was comparable to when S2 was heard last during testing The S2 beacon produced a steady signal and from the doppler wobbling it is also clear that it is in fact coming from AO-40. Ian ZL1AOX reported that he was able to copy and observe (with Spectrogram) the S2 beacon. His LOS time was 2000-12-26 03:45:15. Predicted LOS from NORAD set #12 keps gave 5 secs later. Approx distance was 61,470 Kms. Today, 2000-12-26 at about 16:05 UTC, ZL1AOX will acquire AO-40 shortly after perigee with a reasonably good squint angle. He will than start reloading the IPS software. Until than the beacon will not carry any telemetry, just a carrier. Once the bootloader for IPS is up, you will see "X" blocks in the telemetry until IPS is completely loaded... (Thanks to DB2OS for this information)."