Abel ionospheric inversion technique and its error analysis

作者：Lin Jian^*; Wu Yun

来源：Acta Geophysica Sinica, 2013, 56(4): 1070-1076.

DOI：10.6038/cjg20130402

• GPS radio occultation
• Calibrated TEC inversion
• Epoch Difference inversion
• International Reference Ionosphere 2007

Currently, GNSS-LEO ionospheric radio occultation (IRO) is a new and powerful technique in probing ionosphere. In order to eliminate the effect from the topside ionosphere above LEO, the Calibrated TEC inversion technique retrieves electron density profiles utilizing non-occultation side measurements. In this paper, a new technique is firstly proposed based on the Epoch Difference, and then the two techniques are applied in the inversion of simulated data, subsequently some conclusions can be drawn from the inversion results and its error analysis: the inversion results derived from the Epoch Difference inversion technique show better performance than those derived from the Calibrated TEC inversion technique; no matter which inversion technique is used, the inversion results at the higher orbits (similar to 800 km) are better than those at the lower orbits (similar to 500 km). The lower the profile altitudes, the lower the precision of inversion; the inversion errors are significant during 8-18 (local time), and are mainly located between -30 degrees and 30 degrees (magnetic latitude).

• 出版日期2013-4
• 单位中国地震局; 中国地震局地震研究所