Re: Getting working SiRF Star II GPS +NTPD

Hi Askar,

You can interface Sirf star II GSP receiver using NMEA ref.clock driver.
The receiver should support NMEA with GPRMC, GPGGA or GPGLL sentences.

For PPS support you need to have Linux kernel with PPS patch (Nano
Kernel).
Or else you need to have FreeBSD compiled with PPS option.

The configuration is quite simple. You may refer to the following NTP
documents
http://www.cis.udel.edu/~mills/ntp/html/refclock.html
http://www.cis.udel.edu/~mills/ntp/html/drivers/driver20.html

Can you give details of NMEA sentences supported by Sirf GPS receiver.

Venu
.

Relevant Pages

  • Re: GPS M12+ Motorola: Time accuracy
    ... >> your receiver, you will have to use the PPS ... > system to the GPS time with a high accuracy. ... receiver local time vs GPS time ...
    (sci.geo.satellite-nav)
  • Re: Androcles and Draper resume Einstein 1905
    ... Androcles wrote: ... >>the time of receipt at the receiver. ... > of the mirror, and x2 is the place of the receiver. ... this is not to say that the support of one model negates ...
    (sci.physics)
  • Re: Androcles and Draper resume Einstein 1905
    ... Androcles wrote: ... >>the time of receipt at the receiver. ... > of the mirror, and x2 is the place of the receiver. ... this is not to say that the support of one model negates ...
    (sci.physics.relativity)
  • [RFC] LinuxPPS & syscalls support
    ... config PPS ... -comment "UART serial support " ... If you say yes here you get support for a PPS source connected ... -comment "Parallel printer support " ...
    (Linux-Kernel)
  • Re: UTC Time from NMEA receiver one second behind DCF?
    ... PPS. Theres lot of jitter in these sentences resulting in 1 second ... Its fine if the jitter is within few milliseconds. ... the observed offset is small compared to one second most of the time (and ... NMEA messages the next time this happens. ...
    (comp.protocols.time.ntp)