Fast Realization of Ultra-high-degree Geopotential Model by Improved Least-squares Method
TIAN Jialei, LI Xinxing, WU Xiaoping, XING Zhibin
Acta Geodaetica et Cartographica Sinica . 2018, (11): 1437 -1445 .  DOI: 10.11947/j.AGCS.2018.20170659