Highest ground speed could be measured by typical GPS modules

Discussion in 'General GPS Discussion' started by Nima.mgh, Apr 10, 2021.

  1. Nima.mgh

    Nima.mgh

    Joined:
    Apr 10, 2021
    Messages:
    1
    Likes Received:
    0
    Hi Dears,

    I've got a simple question but it seems it's a good challenge to get right answer for that.

    How can we calculate the highest possible ground-speed which could be recorded by typical GPS modules such as Ublox Neo-7?
    Which parameters of GPS modules will be related to this calculation?

    Any Help Appreciated

    Regards,
    Nima
     
    Nima.mgh, Apr 10, 2021
    #1
  2. Nima.mgh

    Nuvi-Nebie Moderator

    Joined:
    Aug 16, 2015
    Messages:
    2,449
    Likes Received:
    209
    Location:
    UK
    Theoretically I don't think there is a limit to the maximum speed a GPS module can record speed, the unit will calculate a position and after a period of time it will calculate a new positon, it can then calculate the distance between the two locations, let us say they are 50 metres apart, if the time between measurements was 1 second then the speed is 0.05 kilometres per second or 180 kilometres per hour

    Manufactures sometimes limit the maximum speed a unit will record, for example Garmin used to limit their early hand held units to 99 MPH, but this wasn't because the unit stopped working beyond 99MPH, it was because they didn't want their cheaper units used in aeroplanes, this meant customers had to buy their more expensive aviation GPS units

    There is provision in the NMEA sentences for 999.9 Knots (per hour) e.g. :-
    $GPVTG,054.7,T,034.4,M,999.9,N,010.2,K

    This is equivalent to 1150.6 MPH or 1851.8 KMH
     
    Nuvi-Nebie, Apr 11, 2021
    #2
    Mark Hunter likes this.
  3. Nima.mgh

    Mark Hunter

    Joined:
    Apr 16, 2018
    Messages:
    10
    Likes Received:
    1
    Location:
    England
    Don't forget the the COCOM limits, Google says (top hit):

    In GPS technology, the term "COCOM Limits" also refers to a limit placed on GPS tracking devices that disables tracking when the device calculates that it is moving faster than 1,000 knots (1,900 km/h; 1,200 mph) at an altitude higher than 18,000 m (59,000 ft).
     
    Mark Hunter, Apr 19, 2021
    #3
  4. Nima.mgh

    Mark Hunter

    Joined:
    Apr 16, 2018
    Messages:
    10
    Likes Received:
    1
    Location:
    England
    Don't forget that solving the GPS equations automatically also gives velocity for each epoch (PVT)
     
    Mark Hunter, Apr 19, 2021
    #4
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads

  1. 70,000 GPS modules or chip needed

  2. Trimble GPS Pathfinder Office displays/corrects positions exactly 10 ft. NE of measured points.

  3. If you were programming a GPS Modules, which one would you pick and why?

  4. How to get high accuracy time on my laptop by GPS modules.

Loading...