1 / 14

Receiver Phase Bias Calibration Workshop

Explore initial phase biases in satellite receivers and potential calibration methods. Investigate biases' nature, constancy across parameters, and implications for ambiguity resolution in PPP. Preliminary results show bias variability and correlation influences. Workshop held in Quebec City on October 27th, 2006.

jasonmclean
Download Presentation

Receiver Phase Bias Calibration Workshop

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. GEOIDE Workshop (project # 31) Preliminary Results: Receiver Initial Phase Bias Calibration By Simon Banville, Rock Santerre & Marc Cocard Quebec City, October 27th 2006

  2. Context Initial phase offsets, present for both the satellites and the receiver, cause the ambiguities to lose their integer nature.

  3. Motivations • Understand the nature of these biases • Do they really exist? • Do they have constant values between: • Frequencies • Satellites • Epochs • Sessions • Receivers • Find the appropriate way to calibrate or eliminate these biases to perform ambiguity resolution in PPP

  4. Methodology • Use a simulator to produce errorless observations

  5. Methodology • Observation equations involved Carrier phase observation (m) L1 & L2 P2 Code observation (m) Geometric distance between receiver and satellite (m) known Speed of light (m/s) Receiver clock offset (s) Carrier phase wavelength (m) Carrier phase ambiguity (cy) fractional part Receiver initial phase offset (cy) Noise (m) low noise level

  6. Methodology • Inconveniences • Presence of absolute code biases • Correlation between the receiver clock and the ambiguities • Simulator introduces errors • Other error sources (interchannel biases, temperature, etc.)

  7. Preliminary results

  8. Preliminary results

  9. Preliminary results

  10. Preliminary results

  11. Preliminary results

  12. Summary • Still not sure that the initial phase biases exist • The observed biases seem to drift slightly over time • Different values for L1 and L2 • Different values between sessions • Between satellites single differences seem to cancel out most of the observed biases

  13. Thanks to the UNB team for allowing me to use their simulator

  14. Absolute code biases dT(observed) Using P1 dT(real) P1 code bias dT(observed) Using P2 dT(real) P2 code bias The correlations influence the values of the ambiguities

More Related