rjr@mgweed.UUCP (Bob Roehrig) (10/09/84)
qst de k9eui hr arrl bulletin nr 86 from arrl headquarters newington ct october 4, 1984 to all radio amateurs bt the marshall space flight center amateur radio club station wa4nzd will be active during the space shuttle 41g mission. launch is scheduled for 1103 utc on october 5. operating frequencies are 3.840, 7.255, 14.270, 21.355 and 28.610 mhz. see september qst, page 46, for information about the amateur radio experiment onboard this mission ar
wmartin@brl-tgr.ARPA (Will Martin ) (10/11/84)
The base posting of these different shuttle audio relay frequencies did not arrive here until 10 or 11 October; I've been trying (and failing, of course!) to hear the ham-radio-club-relayed shuttle audio on the frequencies I had listed from the last several flights. As I recall, these frequencies stayed the same over a number of flights; why were they changed for this one? There didn't seem to be any more interference than usual on the old frequencies, and, since it is one frequency per band anyway, there can't be any propagational reasons for moving within the band. Anybody have any information about this? Can we get the current set of frequencies announced a week or so PRIOR to the scheduled lift-off? Seeing them around the end of the mission isn't much use, after all... Will Martin seismo!brl-bmd!wmartin or wmartin@almsa-1.ARPA
rjr@mgweed.UUCP (Bob Roehrig) (10/02/85)
qst de k9eui hr arrl bulletin nr 86 from arrl headquarters newington ct september 30, 1985 to all radio amateurs bt on october 8 the earth will pass through the orbit of comet giacobini zinner, only 25 days after the comet has passed. experts have estimated that this might repeat might produce 6000 to 10000 meteors per hour. the annual perseids meteor shower produces about 40 to 60 per hour. packet radio offers an excellent opportunity to collect data on the effect of meteor showers on vhf communication. it is suggested that from 0500 to 2100z on october 8, packet stations call cq on frequencies of 28.0985, 50.65 and 145.09 mhz about every 10 seconds and send only the two letter two figure grid square of your location, optionally followed by the hour and minutes in zulu time if your setup can be programmed to do so. then monitor and save to disk all incoming cq transmissions if possible. if you wish to connect to another station, exchange grid squares. power levels of the order of 100 watts to the legal output limit are usually necessary for meteor scatter communication. on 28.0985 mhz use direct frequency shift keying or frequency shift keying of audio tones via a single sideband transmitter. on 50.65 and 145.09 mhz use frequency shift keyed tones modulating a frequency modulated transmitter. all frequencies are center frequencies. according to fcc rules, the above transmissions must be under operator, not automatic, control at all times. by comparison, unattended beacons in these bands are limited to 100 watts on the subbands of 28.2 to 28.3, 50.05 to 50.08 and 144.05 to 144.06 mhz. listen for w1aw on 50.65 mhz. please send reports to, wake digital communications group c/o ed stephenson, ab4s 700 madison ave , cary nc 27511 a summary will be prepared for qst ar