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[aprssig] Satellite positions: FREQUENCY

Pete Loveall AE5PL Lists hamlists at ametx.com
Mon Oct 17 10:46:34 UTC 2011


This makes the most sense to me.  Instead of creating an autoresponder for every satellite (yes, there are only a couple of interest today but that has not always been the case and, hopefully, won't be the case in the future), have an autoresponder with a station "callsign" of SPACE-IS or something similar where the text of the message would be the satellite(s) of interest or something like "near" for any within X minutes of being in view.  The autoresponder would reply back with a standard message to the requesting station that is numbered requiring an ack from the requesting station.

This eliminates the requirement to know special "callsigns" except for the single autoresponder.  It also presents flexibility in message parsing without requiring the autoresponder to beacon meaning that the messages should be passed to APRS-IS by any proper IGate that saw the query originating station.  It would also allow for objects to be created if desired without the detrimental effect of having "stations" jumping around.  While the objects would not be gated to RF under standard IGate configuration, that would not be necessary if the purpose is for "mobile stations to know when a satellite will be in view" since that would be contained in the message text and Internet connected stations would see the objects for their more elaborate displays.

KISS.

73,

Pete Loveall AE5PL
pete at ae5pl dot net



> -----Original Message-----
> From: Lawrence LaBranche
> Sent: Monday, October 17, 2011 1:21 AM
> 
> Would it be possible to send a message to a generic "sat" or "space" to find
> out the nearest target? Then once the name is known, the user could then
> send another msg to find out detailed info.


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