SIMULATION AND INVERSION OF GNSS IONOSPHERIC OCCULTATION
OBSERVATIONS——THREE FREQUENCY
1)College of Surveying and Geo-informatics,Tongji University,Shanghai 200092
2)Key Laboratory of Modern Engineering Surveying,NASMG,Shanghai 200092
Abstract GNSS radio occultation technique has been proved to be an important method to investigate the ionospheric electron density in different levels.3D ray tracing is the best choice for analyzing the propagation of ray in ionosphere.A group of matrix equations from the differential equation in Cartesian coordinate was used to analyze the detail steps of ray tracing with the formulas.The NeQuick model is used to simulate the excess phase of L1,L2 and L5,and the simulated results are used to retrieval the electric density profile with absolute TEC inversion method with different band combination.The result of two numerical experiments shows that the combination L1-L5 is the preferable choice for vertical density profiles inversion under the identical observation conditions.
Key words :
tri-band GNSS
radio occultation simulation
forward propagation
absolute TEC inversion method
combination L1-L5
Received: 30 August 2013
Published: 09 December 2014
Cite this article:
Hu Chuan,Chen Yi. SIMULATION AND INVERSION OF GNSS IONOSPHERIC OCCULTATION
OBSERVATIONS——THREE FREQUENCY[J]. jgg, 2014, 34(6): 76-80.
Hu Chuan,Chen Yi. SIMULATION AND INVERSION OF GNSS IONOSPHERIC OCCULTATION
OBSERVATIONS——THREE FREQUENCY[J]. jgg, 2014, 34(6): 76-80.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2014/V34/I6/76
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