Review of the development of LEO navigation-augmented GNSS

ZHANG Xiaohong, MA Fujian
2019 Acta Geodaetica et Cartographica Sinica  
Low Earth orbit (LEO) constellation has the advantages of stronger received signal and rapider change of spatial geometry, which can be complementary to the GNSS constellation of medium-or high-Earth orbit, and has significant advantages in augmenting the accuracy, integrity, continuity and availability of GNSS, and has become a hotspot in the field of current satellite navigation. Firstly, this paper briefly presents the existing GNSS augmentation systems and summarizes the developing
more » ... developing actuality of LEO navigation augmentation constellations at home and abroad.In allusion to LEO navigation augmentation, the advantages and disadvantages of the low-, medium-and high-Earth orbits used for satellite navigation are compared and analyzed. Moreover, the opportunities that LEO navigation augmentation system brings in terms of the combined precise orbit determination (POD), rapid and precise positioning, space weather monitoring, and indoor positioning are emphatically discussed.The challenges that the space segment, ground segment and user segment will face are also analyzed and pointed out.
doi:10.11947/j.agcs.2019.20190176 doaj:57c52ca232ba4735bd06b4649357915d fatcat:yeldyyt7avaibkocgu7tiyatam