Correlation analysis of ionospheric profiles for different GPS occultation missions

doi:10.13474/j.cnki.11-2246.2019.0347

Abstract

Abstract: The occultation ionospheric electron density profile events obtained by low-orbit satellites COSMIC、GRACE、CHAMP and FY3C are defined as an occultation pair in a certain range to analyze the different types of occultation ionospheric products. The results show that:the silhouette of the electron density profile between COSMIC occultation consistent well,there are big deviation under 250 km and 500 km above,the deviation is small between 250~500 km,the correlation coefficient of NmF2 and hmF2 can reach 0.99 and 0.97,there are no obvious bias between different COSMIC satellites. The electron density profile have different differences between LEO satellite. By calculating electron density parameters(NmF2 and hmF2), the correlation coefficient of NmF2 and hmF2 between the COSMIC and CHAMP are 0.95 and 0.86 respectively, the correlation coefficient between COSMIC and GRACE are 0.98 and 0.94,the correlation coefficient between COSMIC and FY3C are 0.96 and 0.92. The electron density parameters of different occultation types also have high correlation which could validate the consistence of the GPS radio occultation profiles from different LEO satellite missions.

Key words: ionosphere, correlation analysis, GPS occultation

CLC Number:

P228

ZHOU Rong, HOU Weizhen, ZENG Chenxi, ZHANG Shaocheng, CHAI Bingyang. Correlation analysis of ionospheric profiles for different GPS occultation missions[J]. Bulletin of Surveying and Mapping, 2019, 0(11): 31-38,73.

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