Satellite navigation receiver local time correction method and positioning method
A satellite navigation and receiver technology, applied in the field of global navigation satellite system positioning, can solve the problems of discontinuous observation, wrong observation, affecting the extraction time of observation, etc., to avoid continuous multiple corrections of TMCR, reduce influence, The effect of improving timing accuracy
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[0057] The present invention will be described in detail below with reference to the drawings and embodiments.
[0058] The invention provides a method for correcting the local time of a satellite navigation receiver. The process is as follows figure 1 As shown, the specific steps are as follows:
[0059] Step 1. Use the information obtained from the first frame synchronization to preset the TIC for rough correction.
[0060] In the receiver, the local time system is maintained by various TIC (Time Interval Counter) counters inside the receiver. In order to be consistent with the GNSS time format, the local TIC is designed as: TIC Week Counts the week, there is no count of months and years above, TIC Second Counts the seconds in the week, and TIC Week Omit the counting of hours and days in between. TIC Section Is the count value of the 100ms counter, TIC 100μs It is the count value of the 100μs counter, which is the smallest level counter connected to the crystal oscillator. ...
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