What was the 17th of the 19th block IIA satellites to be launched under the radio-navigation formerly known as "Navatstar"?
USA-126:  It was the seventeenth of nineteen Block IIA GPS satellites to be launched. Global Positioning System: The Global Positioning System (GPS), originally Navstar GPS, is a space-based radionavigation system owned by the United States government and operated by the United States Air Force.
i don't know