Re: Observing USA 193 - tips for beginners

From: John Locker (john@satcom.freeserve.co.uk)
Date: Sat Feb 16 2008 - 11:18:24 UTC

  • Next message: Peter Wakelin: "SATOBS 2008 February 15"

    Agreed Marco , I should have made that clear.......I am refering to this 
    particular object  (USA 193 ) where accuracy to within a second or two will
    be better than nothing.
    
    
    John
    
    
    
    ----- Original Message ----- 
    From: "Marco Langbroek" <marco.langbroek@wanadoo.nl>
    To: "John Locker" <john@satcom.freeserve.co.uk>; "satelliet lijst (SeeSat)" 
    <SeeSat-L@satobs.org>
    Sent: Saturday, February 16, 2008 10:24 AM
    Subject: Re: Observing USA 193 - tips for beginners
    
    
    >
    >
    > John Locker schreef:
    >
    >> So I was scratching around to find a stopwatch , when I realised that my 
    >> portable car GPS has an illuminated clock display , which should be about 
    >> as accurate as I  could expect...
    >
    > Hi John and others,
    >
    > In this case, where being even 1 or 2 seconds "off" still leads to 
    > valuable data, it is good enough. But when you want times to an accuracy 
    > better than a second, the displays of GPS receivers aren't good enough. 
    > While the time the receiver gets from the satellite is very accurate, the 
    > time they show in the display can be quite off with most consumer 
    > receivers. I have frequently noted 1-2 seconds with mine. The priority of 
    > the receiver software is on the position data, and it takes some time 
    > before times received are output to the display. This depends on the exact 
    > brand and type of receiver of course.
    >
    > - 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
    > -----
    >
    >
    >
    > 
    
    
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