There may be a Satellite opportunity for a ham radio RX only payload. No TX allowed.
Any ideas? It will be recoverd one year later.
All I can come up with is a satellite band moniitor that scans the satellte bands and makes a one year survey of QRM and stores it in flash. That is, recording frequency and signal strength and position for a year.
Problem is, I cannot figure out how we could use the data to tell the good guys from the bad guys so it wouldn't tell us much I don't think?
Any other ideas for a RX only space application? Of educational interest? Anyone interesetd in developing the band monitor payload?
Bob, WB4APR
Long term store and forward? Have it log APRS formatted messages sent to a specific user (SPACEACE). When the unit is recovered, post the results to a website.
Could you tell the good guys from the bad by having the good guys use a PL tone and subtract that data from the whole leaving (mostly) bad guys?
What sort of orbit is this likely to be in? Which frequencies would you target?
Kenneth - N5VHO
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Robert Bruninga Sent: Tuesday, February 06, 2007 11:28 AM To: [email protected] Subject: [amsat-bb] RX only satellite?
There may be a Satellite opportunity for a ham radio RX only payload. No TX allowed.
Any ideas? It will be recoverd one year later.
All I can come up with is a satellite band moniitor that scans the satellte bands and makes a one year survey of QRM and stores it in flash. That is, recording frequency and signal strength and position for a year.
Problem is, I cannot figure out how we could use the data to tell the good guys from the bad guys so it wouldn't tell us much I don't think?
Any other ideas for a RX only space application? Of educational interest? Anyone interesetd in developing the band monitor payload?
Bob, WB4APR
_______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
There may be a Satellite opportunity for a ham radio RX only payload. No TX allowed.
Any ideas? It will be recoverd one year later.
So the object will be actually physically recovered from space. Have the parts been selected for the Eagle yet? Maybe this is a way to put up some DSP chips, or capacitors err, whatever other devices you guys are contemplating, power them up during the test, and then check them out later under a microscope to see how they do?
Receive only, hmm, how about this. I have zero idea how hard this would be to do, but what about a receiver to create an 'RF noise pollution' map. Something like the light pollution maps they have for the astronomers. This is to create a visual aid to highlight the plight of poor suffering radio operators and the ever rising noise levels on the radio in the cities.
Robert Bruninga wrote:
There may be a Satellite opportunity for a ham radio RX only payload. No TX allowed.
Any ideas? It will be recoverd one year later.
It wonder if there would be anything interesting to find with a space borne ELF/VLF receiver? probably some interesting solar event observations, or some insight into natural radio. Must be pretty quiet that far away from interference sources.
Just throwing it out there.
73, Jason White N1XBP
On 6 Feb 2007 at 12:28, Robert Bruninga wrote:
There may be a Satellite opportunity for a ham radio RX only payload. No TX allowed.
Any ideas? It will be recoverd one year later.
All I can come up with is a satellite band moniitor that scans the satellte bands and makes a one year survey of QRM and stores it in flash. That is, recording frequency and signal strength and position for a year.
Problem is, I cannot figure out how we could use the data to tell the good guys from the bad guys so it wouldn't tell us much I don't think?
Any other ideas for a RX only space application? Of educational interest? Anyone interesetd in developing the band monitor payload?
Bob, WB4APR
The icom PCr-1000 software come with a DTMF software decoder. If a terrestrial station sends a burst of DTMF tones at the key up identifying their station could be there is a way to pin point a QRM source by elimination.
This system will required each station to provide a way to inject theses DTMF code at the start of each transmission.
Some police radio system used this system to ID their police car.
Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe WAC BASIC CW PHONE SATELLITE
I like the noise pollution map on a single frequency...as Bob likes 145.825, that sounds like a good one to me...a timer combined with a signal strength indicator should provide quality information if the orbit is stable...
Roger WA1KAT
----- Original Message ----- From: "Robert Bruninga" [email protected] To: [email protected] Sent: Tuesday, February 06, 2007 12:28 PM Subject: [amsat-bb] RX only satellite?
There may be a Satellite opportunity for a ham radio RX only payload. No TX allowed.
Any ideas? It will be recoverd one year later.
All I can come up with is a satellite band moniitor that scans the satellte bands and makes a one year survey of QRM and stores it in flash. That is, recording frequency and signal strength and position for a year.
Problem is, I cannot figure out how we could use the data to tell the good guys from the bad guys so it wouldn't tell us much I don't think?
Any other ideas for a RX only space application? Of educational interest? Anyone interesetd in developing the band monitor payload?
Bob, WB4APR
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
In the year(s) that the sun cycle is to be on the upswing, how about one that scans the HF beacons and records signal strength of the various beacons and satellite location on a daily basis. Then a year later see if any propagation events such as storms etc., affected the signals in space by comparing space wx data with signal reports. You could just use 28 MHz NCDXF/IARU beacons
Just an idea.
GL and 73 Greg N3MVF
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Roger Kolakowski Sent: Tuesday, February 06, 2007 7:23 PM To: [email protected]; [email protected] Subject: [amsat-bb] Re: RX only satellite?
I like the noise pollution map on a single frequency...as Bob likes 145.825, that sounds like a good one to me...a timer combined with a signal strength indicator should provide quality information if the orbit is stable...
Roger WA1KAT
----- Original Message ----- From: "Robert Bruninga" [email protected] To: [email protected] Sent: Tuesday, February 06, 2007 12:28 PM Subject: [amsat-bb] RX only satellite?
There may be a Satellite opportunity for a ham radio RX only payload. No TX allowed.
Any ideas? It will be recoverd one year later.
All I can come up with is a satellite band moniitor that scans the satellte bands and makes a one year survey of QRM and stores it in flash. That is, recording frequency and signal strength and position for a year.
Problem is, I cannot figure out how we could use the data to tell the good guys from the bad guys so it wouldn't tell us much I don't think?
Any other ideas for a RX only space application? Of educational interest? Anyone interesetd in developing the band monitor payload?
Bob, WB4APR
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
_______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[email protected] wrote:
There may be a Satellite opportunity for a ham radio RX only payload. No TX allowed. Any ideas?
Hi Bob, When you say "No TX allowed" I am assuming you mean no RF transmissions allowed. What about light?
Would visible or infrared transmissions be allowed? Could you include a laser or a couple hundred high intensity LEDs? If so, these could be pulsed with a forward error corrected signal (or just plain old CW) or connected to an analog (or digital receiver). The LEDs would be more visible when the satellite is in eclipse. Very slowly pulsed LEDs might be decoded with a webcam (and maybe a telescope) to send short bulletins or short QSOs.
No? Okay, how about a suitcase-sized sphere of highly reflective multi-faceted mirrors with "something" over the mirror(s) which you can electronically make opaque or translucent very quickly. No moving parts -- just reflective or not-reflective. This could then be turned on-off to send a FEC encoded signal or even CW. Depending on the orientation of the mirror(s), the sun, and the groundstation(s), when the orientation is just right then you could then communicate with an RF uplink and a reflected sunlight downlink. Just how fast you could send a signal would depend on how fast you could switch between opaque and translucent.
Possibly whoever said "No TX allowed" wouldn't object to passively reflected (and not-reflected) sunlight. :-)
Before you say it won't work, consider the small size of the mirrors on the Starshine satellite (about one inch diameter, if I recall) and the "not huge" size of the highly reflective surface on the iridium satellites, which is very bright, very predictable (see www.heavens-above.com to predict iridium flares) and at times briefly outshines even the ISS.
I think a two meter uplink with a light downlink could be very interesting.
Hope this helps,
Douglas KA2UPW/5
participants (8)
-
Cathryn Mataga -
Douglas Quagliana -
Greg Dober -
Jason White -
Luc Leblanc -
Ransom, Kenneth G. (JSC-OC)[BAR] -
Robert Bruninga -
Roger Kolakowski