Search results

  1. Alexander Khvalkov

    Release 3.0.11.802

    It was fixing pretty fast, 5 minutes ago, then something happened. Is it open sky place?
  2. Alexander Khvalkov

    Release 3.0.11.802

    Hello Giulio, The latest file, point12, contains only 130 seconds of data when the corrections from the base were available. I see only the second engine is working trying to fix, progress (contrast ratio) is growing during a minute then drops to zero ( was a reset 14: "outliers can not be...
  3. Alexander Khvalkov

    Sudden Loss of Workable Fix in Open

    We have been doing long tests observing quality of fix, namely such parameters as time-to-fix, number of used satellites, position estimated, etc. For this purpose, a Triumph-LS s/n #00188 (6-engine version), was set up on the factory's roof getting RTCM3 corrections from a base nearby. Four...
  4. Alexander Khvalkov

    Sudden Loss of Workable Fix in Open

    I have been analyzing the data of the three points: 2004, 2009, 2010 that were measured on June 14 and 15. Point 2010 locates at open sky, see please attached Google Map picture, and has 100% RTK fix on both the days. Point 2004 locates at a canopy and has poor fix on both the days, most...
  5. Alexander Khvalkov

    "Far from STDL" on all engines...

    The idea of differential positioning is that that the base-to-rover vector is computed with high accuracy, then the vector is being added to the base's position, and finally the rover's position is provided. Big difference between RTK rover's position and a standalone rover's position might be...
  6. Alexander Khvalkov

    "Far from STDL" on all engines...

    RTK first computes the rover's position as a code differential one and compares it with the standalone. If the difference is bigger than the threshold, RTK resets itself. If the threshold is set to zero, it doesn't compare at all.
  7. Alexander Khvalkov

    no satellites.

    Please, log down a short, 3-5 minute, jps file and attache it to this thread, I will check if all corrections come form the base, including base's coordinates. To do that, you need to tap 'REC' in the collecting screen then to tap 'Start Continuous Recording' and later stop, see please attached...
  8. Alexander Khvalkov

    Sigma - RTK - NMEA messages

    Hi , Robert; You don't need to enter the cable's length because the group delay caused by the cable on the rover's side as well as on the base's side, namely their difference, together with other delays is estimated in rtk. RTK switches to fix solution automatically, as well as from fix to...
  9. Alexander Khvalkov

    CRTN Mountpoint Position Discrepancy

    Jim, please ask Yehuda what is the coordinate system they translate position in 1006 message, we suppose it is ITRF2014 at epoch 2019.0.
  10. Alexander Khvalkov

    CRTN Mountpoint Position Discrepancy

    Yes, these values I got today in the stream from port 9729 and decoded.
  11. Alexander Khvalkov

    CRTN Mountpoint Position Discrepancy

    Here is the position they translate from UCD1 mount point. *** Reference position *** HEADER 1006 ID: 10, Length: 21, Crc: 3663548, ITRF Year: 0, Flags: 0xA Coord_XYZ_ID_1006: -2628826.3248 -4247932.4201 3952176.7324 10 Coord_BLH_ID_1006: 0.6726 -2.1250 -0.3172 10 *** Antenna descriptor ***...
  12. Alexander Khvalkov

    CRTN Mountpoint Position Discrepancy

    LS takes the base's position from RTCM3 1006 message (or 1005 message), and the distance to the base indicated in LAN (WLAN) status screen is calculated getting current rover's position and base's position from 1006 (1005) message. CRTN seems to transmit base's position incorrectly in what I...
  13. Alexander Khvalkov

    CRTN Mountpoint Position Discrepancy

    1280-099 zip file contains data of December 27, and the points are 2 miles away of Feb 12 , Feb 25 points, see please attached kml files. I cannot compare the positions. I would expect yesterday's raw data to post-process and compare whether post-processing gives the same coordinates as...
  14. Alexander Khvalkov

    CRTN Mountpoint Position Discrepancy

    Jim, in the yesterday's zip file, 1280-100 Raw Data.zip, I see jps files of Feb 12, Feb 25, Feb 28 only.
Top