Analysis of the Accuracy of Beidou Combined Orbit Determination Enhanced by LEO and ISL
FENG Laiping, MAO Yue, SONG Xiaoyong, SUN Bijiao
Acta Geodaetica et Cartographica Sinica . 2016, (S2): 109 -115 .  DOI: 10.11947/j.AGCS.2016.F032