George Roberts schreef: > I assure you my laptop can trigger the camera at a certain time greater > than 1 second accuracy and my laptop can also have it's time set to a > time more accurate than 1 second. I have a typical ping time of 100ms > round trip to the Navy time source so my error is no worse than half that. > > - George Roberts PC's do *not* trigger very accurately. It depends on how many processes are running in the CPU and which ones are given priority - and that is variable. So *after* the clock has synchronized to a NISP the timig behind different processes conducted by the CPU - such as triggering a camera is variable, depending on what processes are running at the moment. Bottom line: forget about PC's as a way to trigger camera's at a very precise timing. The best way is simply manual, with a wire release and a clock in hand! - Marco ----- Dr Marco Langbroek - SatTrackCam Leiden, the Netherlands. e-mail: sattrackcam@wanadoo.nl Cospar 4353 (Leiden): 52.15412 N, 4.49081 E (WGS84), +0 m ASL Cospar 4354 (De Wilck): 52.11685 N, 4.56016 E (WGS84), -2 m ASL SatTrackCam: http://home.wanadoo.nl/marco.langbroek/satcam.html Station (b)log: http://sattrackcam.blogspot.com ----- ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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