What is the minimum number of satellites that must be available for a differential solution of latitude, longitude, height, and time?

(A) 1

(B) 2

(C) 3

(D) 4

The answer is (D)

This is problem 24 (11-4) from the NEW third edition of “Surveying Solved Problems for the FS and PS Exams” by Jan Van Sickle, PLS (formerly "1001 Solved Surveying Fundamentals Problems"). Reprinted with permission from “Surveying Solved Problems for the FS and PS Exams” by Jan Van Sickle, PLS (2008 Professional Publications Inc.). For details on this and other FLS exam-prep books, call 800/426-1178 or visit www.ppi2pass.com.