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English Forums => General Discussion => Topic started by: XeroX on May 28, 2020, 12:27:17 am

Title: GPS huge offset
Post by: XeroX on May 28, 2020, 12:27:17 am

Hello,
I've setup a u-blox GPS Module. Using it via u-center and or checking console output via:

Code: [Select]

cat gpsinit | cu -s 9600 -l /dev/gps0
Shows me the correct timing:

Code: [Select]

$GNZDA,221311.00,27,05,2020,00,00*7A
Setting it up via the Interface and checking the status shows an offset of ~330 seconds and marks the GPS Module as falseticker.

What am I doing wrong? Using default settings.

Title: Re: GPS huge offset
Post by: XeroX on July 07, 2020, 02:53:31 pm

Can anyone help me with that?

Attached the GPS Module with PPS signal via Serial Port.

FudgeTime2 = 0

Still 24 Seconds offset.

Reading from serial port directly shows correct time that I receive from PTB NTP.

Cheers

Title: Re: GPS huge offset
Post by: baqwas on July 14, 2020, 10:40:29 pm

Hello @XeroX,

You can get authoritative responses from the folks at time-nuts@lists.febo.com. Most of the discussion there is beyond my gray matter but you will definitely get an answer or two.  :)

Kind regards.

P.S. I've struggled with Pharos and u-blox devices myself too (limited to RPi and Nano these days) but since I'm not after PPS I use my devices for user interface exploration of objects in the sky!