F9P Surveying In

GPS / RTK / GNSS
15

these are the the steps i followed hopefully it saves the next guy some time.
i’m using the simpleRTK2B

Quote from Natural Resources Canada

  • FINAL (+/- 2 cm): combined weekly and available 13 -15 days after the end of the week
  • RAPID (+/- 5 cm): available the next day
  • ULTRA RAPID (+/- 15 cm): available every 90 minutes (not available to download)

It is preferable to compute the base station’s coordinates before starting the Real Time Kinematic (RTK) work. You could setup the base station ahead of time and collect raw GNSS data (anywhere from 2hrs to 24 hrs depending on the accuracy required). Leave the base station in place. Transform the raw data to RINEX and submit it for Static CSRS-PPP processing. CSRS-PPP can process the data approximately 90 minutes after data collection.

what you need to do.

  1. Survey in your base station using u-center. i surveyed for 12 hours until my accuracy was not getting any better.
  2. switch timemode3 to fix mode from survey in. enter static coordinates you just surveyed in.
  3. right click on UBX->RXM->RAWX and enable messages.
  4. change your usb port to only output UBX. UBX->CFG->PRT change taget to the port youare using. you only need to set the output to UBX
  5. Disconnect u-center from the ZED-F9P
  6. downloaded RTKLIB from this site. it was suppose to have support for the newer ZED-F9P.
  7. un-zip rtk Lib
  8. run strsvr. input will be the serial pot you are connected to. use the same connection setting u-center was using. set the output to a text file.(you are taking a serial strean that is UBX and saving it to a text file. you defined UBX in ucenter)
    image
  9. collect data as long as you want to. 1 week = 2cm, 1 day = 5cm 90min = 15cm. longer the better. Government of Canada website has a max upload of 300mbyte. i collected data for the first 24 hours. submitted my result. then i ran it again for 1 week.
  10. open rtkconv.exe select the file you just created. change format to u-blox. set the location to save the output files.
    image
  11. click convert. this should create a .obs file(this is what you can upload to the Canadian government site.)
  12. go to Precise Point Positioning
    create an account if needed.
  13. select a epoch data to use and select the .obs file you created to upload. if there are multiple files. you can zip them together. zipping will also create a smaller file to upload.
    14.click “summit to PPP”
  14. wait about 90 min to receive an email with the results. my new coordinates were in “out_pitfile_test.sum”
  15. enter the new coordinates in timemode3 in ucenter UBX->CFG->TMMODE3

i’m just running this now. i ran a small test that did not improve my accuracy because it was only 5 min. ill update this afternoon with my results. current accuracy is .5 meters. Also my antenna is not on a metel plate yet.

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