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different localisations for the same timestamp


From: Marcin Bułka
Subject: different localisations for the same timestamp
Date: Thu, 14 Oct 2021 09:24:53 +0200

Hi all,

I am using gpsd 3.20 and I see that for almost every tpv object there is another tpv object with the same timestamp but with different localisation and I don't know how to interpret it, because a gps receiver can't be in two different places at one time. For example I have tpv objects with values like this:

timestamp: 1633008508200, eps: 0.16, lat: 45.11, lon: -0.85
timestamp: 1633008508200, eps: 0.16, lat: 45.12, lon: -0.86
timestamp: 1633008508300, eps: 0.15, lat: 45.12, lon: -0.86
timestamp: 1633008508300, eps: 0.15, lat: 45.13, lon: -0.87

Additionally my gps receiver has max update rate equal to 10Hz so I shouldn't have a difference between timestamps in two tpv objects smaller than 0.1 sec.

Can someone help me to understand this?

BR,
Marcin

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