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GPS World Author

Liang Heng


Liang Heng is a Ph.D. candidate under the guidance of Professor Per Enge in the Department of Electrical Engineering at Stanford University.


Article
Innovation: Digging into GPS Integrity   November 1, 2011
By: Grace Xingxin Gao,Liang Heng,Per Enge,Todd Walter

There are four important requirements of any navigation system: accuracy, availability, continuity, and integrity. In this month’s column we take a look at one particular aspect of GPS integrity: that of the signal in space and find out how trustworthy is the satellite ephemeris and clock...more >>