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Re: [gpsd-dev] PPS over USB
From: |
Hal Murray |
Subject: |
Re: [gpsd-dev] PPS over USB |
Date: |
Wed, 02 May 2012 00:58:08 -0700 |
address@hidden said:
> Clock time should be OK even with a single sat - multiple birds are needed
> for the spherical trig to compute position, but atomic time you get directly
> from each sat sample.
I think it's more complicated than that.
You can get time with only 1 sat if know where you are located. It takes
special software, usually called "timing".
The usual approach for finding the location is to do a "survey". That
requires more special software which is usually included in the timing
package. It collects a 1000 (or whatever) good samples and averages the
position. The "good" qualifier means they don't use low-quality samples
which might be way off.
It's worth asking Navisys if they have the timing mode software.
--
These are my opinions, not necessarily my employer's. I hate spam.
- [gpsd-dev] PPS over USB, Gary E. Miller, 2012/05/01
- Re: [gpsd-dev] PPS over USB, Dave Taht, 2012/05/01
- Re: [gpsd-dev] PPS over USB, Jim Thompson, 2012/05/01
- Re: [gpsd-dev] PPS over USB, Eric S. Raymond, 2012/05/01
- Re: [gpsd-dev] PPS over USB,
Hal Murray <=
- Re: [gpsd-dev] PPS over USB, Jim Thompson, 2012/05/02
- Re: [gpsd-dev] PPS over USB, Gary E. Miller, 2012/05/02
- Re: [gpsd-dev] PPS over USB, Chris Kuethe, 2012/05/02
- Re: [gpsd-dev] PPS over USB, Dave Taht, 2012/05/02
- Re: [gpsd-dev] PPS over USB, HÃ¥kan Johansson, 2012/05/02
- Re: [gpsd-dev] PPS over USB, Gary E. Miller, 2012/05/02
- Re: [gpsd-dev] PPS over USB, Chris Kuethe, 2012/05/02
- Re: [gpsd-dev] PPS over USB, Eric S. Raymond, 2012/05/06
- Re: [gpsd-dev] [Thumbgps-devel] PPS over USB, tz, 2012/05/02
- Re: [gpsd-dev] [Thumbgps-devel] PPS over USB, Gary E. Miller, 2012/05/02