Detection method of real-time GPS (Global Position System) carrier phase cycle slip for frequency taming

A technology of carrier phase and detection method, applied in the field of data processing, which can solve the problems of low precision, inability to repair small cycle slips, and inability to determine which frequency point the cycle slips occur in.

Inactive Publication Date: 2015-04-29
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology

Due to the low accuracy of code measurement, the code-phase comparison method cannot repair small cycle slips of 1 to 2 cycles; the Doppler integration method is also unable to repair small cycle slips; It is insensitive, and it is impossible to judge which frequency poin

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  • Detection method of real-time GPS (Global Position System) carrier phase cycle slip for frequency taming
  • Detection method of real-time GPS (Global Position System) carrier phase cycle slip for frequency taming
  • Detection method of real-time GPS (Global Position System) carrier phase cycle slip for frequency taming

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[0047] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0048] The detection method of the real-time GPS carrier phase cycle slip used for frequency taming provided by this embodiment, the specific steps are:

[0049] Step1. Calculate the carrier phase observations and pseudorange observations of the L1 and L2 frequency points of GPS, and calculate the MW wide-lane combined observations according to the carrier phase observations and pseudorange observations of the L1 and L2 frequency points of GPS, specifically including The following sub-steps:

[0050] Step1.1. Observe the GP...

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Abstract

The invention discloses a detection method of real-time GPS (Global Position System) carrier phase cycle slip for frequency taming. The detection method comprises the following steps: S1, calculating an observed value of an MW (Melbourne-Wubbena) wide lane combination, S2, estimating ambiguity of an MW wide lane, S3, calculating a cycle slip decision item, S4, calculating a cycle slip decision threshold, judging whether the cycle slip decision item exceeds the cycle slip decision threshold, and moving to Step S5 if not, S5, calculating an electron content change rate of an ionized layer of an epoch (k), S6, predicting TECR (Total Electron Content Change Rate) value of the epoch (k) according to history data, and S7, calculating a detection threshold of a TECR method, calculating the difference between a calculated value and a predicted value of the epoch (k), and judging whether the detection threshold of the TECR method is exceeded. The method is combined with a constraint condition limitation that the total electron content change rate of the ionized layer is limited in a short period, shows the same cycle slip on L1 and L2 frequency points via linear combination of a carrier phase observation equation, and covers the shortage of an MW method.

Description

technical field [0001] The present invention relates to data processing methods. More specifically, it relates to a method for detecting real-time GPS carrier phase cycle slips for frequency taming. Background technique [0002] GPS carrier phase technology can not only achieve high-precision positioning, surveying and navigation, but also has important applications in time transfer and frequency taming. For frequency taming, the use of carrier phase observations instead of traditional C / A code observations, because the carrier frequency is about 1000 times higher than the C / A code rate, can better suppress receiver thermal noise and atmospheric delay, and improve Accuracy and stability of taming frequency sources, where atmospheric delays include ionospheric and tropospheric delays. Moreover, due to the stability of the carrier phase observation, the tame frequency standard can reach its predetermined working performance index in a shorter time. [0003] For the carrier ...

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Application Information

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IPC IPC(8): G01S19/23
CPCG01S19/23
Inventor 王宏博易航张升康王海峰
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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