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Re: [Paparazzi-devel] real time telemetry questions

From: pascal . brisset
Subject: Re: [Paparazzi-devel] real time telemetry questions
Date: Fri, 23 Jan 2009 18:43:24 +0100 (CET)


>  154.629 166 GPS_SOL 591 202441 0 7 I just don't know what exactly is the 
> timer 154.629. (I replaced the SACC with my value.)

Time in seconds since the server has been started 
(sw/ground_segment/tmtc/ and 225)

>(2) Is it possible that we get another kind of more accurate timer instead of 
>the default timer in pprz msg? We have an IMU
> onboard sending data to pprz board. but I found out that the log on IMU and 
> pprz telemetry on gcs are not the exactly same. It
> has a random delay varing between 0-0.5second. Any body know why? 

 Transmission latency ?
 The gps.h:gps_itow contains the TOW (in ms) of the last received GPS message. 
It could be used as a time source.


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