1 “... is dedicated to GPS. Dr. Collins retired from the U.S. National Geodetic Survey in 1980, where he...”

2 “... is dedicated to GPS. Dr. Collins retired from the U.S. National Geodetic Survey in 1980, where he...”

3 “... is dedicated to GPS. Dr. Collins retired from the U.S. National Geodetic Survey in 1980, where he...”

4 “...'s main interest is dedicated to GPS. Dr. Collins retired from the U.S. National Geodetic Survey in 1980...”