- SPECIAL REPORTS - THE MAGAZINE Problem: The Global Positioning
System (GPS): ObservablesWhat is the minimum number of
satellites that must be available for a differential solution of
latitude, longitude, height and time? This is problem 24(11-14)
from the new second edition of 1001 Solved Surveying Problems by
Jan Van Sickle. Reprinted with permission from 1001 Solved
Surveying Problems by Jan Van Sickle (1997, 728 pp.,
Professional Publications Inc.). For details on this and other
FLS exam-prep books, call 800/426-1178 or visit www.ppi2pass.com
.