March 2015
Beginner to intermediate
840 pages
25h 12m
English
Content preview from GPS Satellite Surveying, 4th Edition
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6.6.3.3 Across-Satellite Differencing
The attraction of across-satellite differencing relates to the cancelation of receiver clock errors and receiver hardware delays. The technique was applied in Garbor and Nerem (1999) and later refined in Ge et al. (2008). The model functions are again the ionospheric-free carrier base and pseudorange functions, the 
function, and, for convenience, we add the 
function (6.1.49). Assuming satellite 1 as the base satellite, the difference functions are for a general station 
:
The superscripts indicate the across-satellite differencing operation. The receiver terms 
, 
, and 
cancel due to the differencing, i.e., the receiver clock error and the receiver hardware delays cancel. Since is the difference of and according to (6.1.49), the satellite hardware ...
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