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Author GPS Speeds vs Speedo
Chris
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Registered: 21st Sep 99
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9th Sep 10 at 21:20   View Garage View User's Profile U2U Member Reply With Quote
One of the main issues is that L1C navigation message, called CNAV-2, is 1800 bits (including FEC) and is transmitted at 100 bit/s. It contains 9-bit time information, 600-bit ephemeris, and 274-bit packetized data payload.
Ian
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Registered: 28th Aug 99
Location: Liverpool
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9th Sep 10 at 21:21   View Garage View User's Profile U2U Member Reply With Quote
Yeah that could ruin your day.
Nath
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Registered: 3rd Apr 02
Location: MK
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9th Sep 10 at 21:33   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Chris
One of the main issues is that L1C navigation message, called CNAV-2, is 1800 bits (including FEC) and is transmitted at 100 bit/s. It contains 9-bit time information, 600-bit ephemeris, and 274-bit packetized data payload.



We use L5 sats at work. And GLONASS, and soon Galileo.
chrex
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Registered: 26th Aug 07
Location: Brawdy/Wirral
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9th Sep 10 at 21:44   View User's Profile U2U Member Reply With Quote
calibrated speedo. the speedo and GPS speed are exact all the time. woo!
DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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10th Sep 10 at 08:58   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by chrex
calibrated speedo. the speedo and GPS speed are exact all the time. woo!


Even going up and down hills?

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