charlie@oakhill.UUCP (Charlie Thompson) (12/30/88)
Satellite Trackers: I am currently tracking the NOAA satellites and receiving APT data on an R7000 in wideband FM mode. What I want to know is how SYNC is derived from the APT format. I know what the modulation format is but what is a GOOD way to extract the SYNC? or ... Do people ignore the sync and instead depend upon stable sampling of the video to derive a picture with little or no horizontal precession of the picture from 'top' to 'bottom'. I have seen 'asynchronous' systems like this described. Any suggestions? Is there a good source of old G1 FAX machines around that could be used for hardcopy? Any stuff for the Macintosh? I'll be happy to share info with anyone receiving NOAA or the Russian METEOR weather satellites. Thanks! Charlie Thompson WB4HVD Austin, TX
postmaster@mailcom.FIDONET.ORG (Bernard Aboba) (02/02/89)
You may wish to check out the last few issues of Circuit Cellar INK which has a had a running series of articles on processing of data from weather satellites. By the way, I recommend INK highly; as of this month, it's Steve Ciarcia's sole publishing vehicle, and the other articles are all very well written and of high technical content. The usual disclaimer: I'm not an employee, relative, etc. of INK.