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Thread: Why Sirf and not Nmea..??

  1. #1
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    Why Sirf and not Nmea..??

    As the title says...?
    P4.1,8 - 512 ram - Power: M1-ATX 6-24V DC/DC - HU: Blaupunkt Seattle MP74 - Lcd: lilliput touch. - GPS rec. Navilock NL-202U ( USB).- 2 usb for ex. - 1 cardread. 9 in 1. - Softw.: MapMonkey - Frontend: Roadrunner

  2. #2
    Maximum Bitrate SAScooby's Avatar
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    I think SIRF is the chipset/aerial and NMEA is the protocol the information is delivered in
    Nano ITX / 512 MB / 60 GB / Panasonic slot load / M1-ATX / Bu303 / Sound blaster 24 / PPi amps / rockford sub

  3. #3
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    Quote Originally Posted by SAScooby
    I think SIRF is the chipset/aerial and NMEA is the protocol the information is delivered in
    Hmm..why do people in here prefere sirf insted of nmea.. Is it quicker or...?
    P4.1,8 - 512 ram - Power: M1-ATX 6-24V DC/DC - HU: Blaupunkt Seattle MP74 - Lcd: lilliput touch. - GPS rec. Navilock NL-202U ( USB).- 2 usb for ex. - 1 cardread. 9 in 1. - Softw.: MapMonkey - Frontend: Roadrunner

  4. #4
    FLAC ShawJohn's Avatar
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    As far as I know SirF is the name of the chipset company who makes these GPS thingies...

    BUT Sirf is also the name given to the binary protocol that the GPS Mouse uses to communicate with the PC. SirF uses binary at 19,200bps, and NMEA uses ASCII code sent at 4800bps.

    Hence Sirf is faster, and also appears to be more accurate in use.

    Thats how I understand it anyway.
    :GOOGLE: if you want more...

    John

  5. #5
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    Give http://www.sirf.com a browse.
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  6. #6
    FLAC Chairboy's Avatar
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    Peeps keep saying it's faster, but that's immediately followed by 'Well, it's still 1hz.'

    Which is it?
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  7. #7
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    Okay..thanks. I did try to run D3 beta in Sirf and in gps settings there is: find gps and set gps. When i press find, it finds the gps. When I press: set gps it says: com port is busy!! Anyone knows what im doing wrong?
    P4.1,8 - 512 ram - Power: M1-ATX 6-24V DC/DC - HU: Blaupunkt Seattle MP74 - Lcd: lilliput touch. - GPS rec. Navilock NL-202U ( USB).- 2 usb for ex. - 1 cardread. 9 in 1. - Softw.: MapMonkey - Frontend: Roadrunner

  8. #8
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    And how do I swith the gps back to NMEA? In the Sirf program.
    P4.1,8 - 512 ram - Power: M1-ATX 6-24V DC/DC - HU: Blaupunkt Seattle MP74 - Lcd: lilliput touch. - GPS rec. Navilock NL-202U ( USB).- 2 usb for ex. - 1 cardread. 9 in 1. - Softw.: MapMonkey - Frontend: Roadrunner

  9. #9
    Constant Bitrate Prindle19's Avatar
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    accuracy has nothing to do with sirf or nimea protocol, the update time difference is almsot indistinguishble. More important is whether or not the gps receiever is cable of receiving a differential correction signal either from the WAAS enabled satelites, or coast guard or LORAN-C beacons.

  10. #10
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    Thanks Trying Sirf now!
    P4.1,8 - 512 ram - Power: M1-ATX 6-24V DC/DC - HU: Blaupunkt Seattle MP74 - Lcd: lilliput touch. - GPS rec. Navilock NL-202U ( USB).- 2 usb for ex. - 1 cardread. 9 in 1. - Softw.: MapMonkey - Frontend: Roadrunner

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