Ionosphere irregular body drift velocity estimation method based on geodesic receiver
A drift speed, ionosphere technology, applied in the direction of measuring device, radio wave measurement system, satellite radio beacon positioning system, etc., to achieve the effect of cost reduction and wide practicability
Active Publication Date: 2021-08-13
CHINA UNIV OF MINING & TECH
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[0005] Aiming at the deficiencies of the existing technology, a method for estimating ionospheric irregularity drift velocity based on geodesic receivers is provided, and widely distributed low sampling frequency geodetic receivers are used to estimate ionospheric irregularity drift The speed solves the technical problem that it is difficult to dynamically monitor ionospheric irregularities on a global scale
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[0031] Embodiments of the present invention will be further described below in conjunction with accompanying drawings:
[0032] Such as figure 1 As shown, a method for estimating the drift velocity of ionospheric irregularities based on a geodesic receiver of the present invention:
[0033] aBecause the drift speed of ionospheric irregularities in the Arctic region is usually 300m / s to 3000m / s, for a sampling frequency of 1s, the drift distance of ionospheric irregularities within the sampling interval is 300m to 3km. The drift velocity of ionospheric irregularities, select three geodesic receivers with a baseline length less than 3km in the monitoring area, and obtain the peak electron density changes in the ionospheric F region through the incoherent scatter radar and ionospheric altimeter electron density files Interval, to determine the assumed altitude of the ionosphere, combined with vector trigonometric functions, to estimate the scanning speed of the GNSS satellite at...
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The invention discloses an ionosphere irregular body drift velocity estimation method based on a geodesic receiver, and is suitable for monitoring ionosphere scintillation astronomical disasters. The method comprises the following steps: firstly, researching a peak electron density change interval in an ionosphere F region, determining an assumed height of the ionosphere, and estimating a scanning speed of a GNSS satellite at the assumed height of the ionosphere by combining a vector trigonometric function; carrying out geodetic measurement trend separation and receiver hardware delay correction on the carrier phase data, and synchronizing a geodetic receiver network carrier phase signal; estimating the irregular body form drift speed observed by the receiver network; and performing vector sum on the scanning speed of the GNSS satellite at the assumed height of theionosphere and the irregular body form drift speed observed by the receiver network to obtain the drift speed of theionosphere irregular body. The method is simple in steps, greatly reduces the monitoring cost of the ionosphere irregular body, facilitates the complete monitoring of the dynamic change of the global ionosphere irregular body by using the existing survey station technology bureau, and has wide practicability.
Description
technical field [0001] The invention is applicable to an ionospheric irregular body drift velocity estimation method, and is especially suitable for an ionospheric irregular body drift velocity estimation method based on a geodesic receiver for monitoring ionospheric scintillation astronomical disasters. [0002] technical background [0003] When GNSS satellite signals pass through ionospheric irregularities, there will be severe fluctuations in amplitude or phase, and this phenomenon is called ionospheric scintillation. Ionospheric scintillation is a kind of astronomical disaster that occurs frequently in the equatorial and polar regions. It is a major problem faced by space science in recent years, and it brings great challenges to the stability of GNSS system position, navigation and time services. The layer scintillation event caused the interruption of GNSS navigation satellite service, seriously disturbed the power, banking system and navigation safety of the Arctic ro...
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Login to View More IPC IPC(8): G01S19/52
CPCG01S19/52
Inventor 赵东升陶媛媛李旺王潜心李宸栋唐旭张克非
Owner CHINA UNIV OF MINING & TECH