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NTS 1 (P73-3)


In 1973, the Timation program was merged with the Air Force's 621B program, with the Air Force being named as the Executive Service, to form the NAVSTAR GPS program. NRL'S Timation 3 satellite was redesignated the NTS-1 (Navigation Technology Satellite 1) and was launched in the summer of 1974 in connection with the NAVSTAR effort. NTS-1 had two rubidium-vapor frequency standards (clocks), while the earlier Timation satellites had carried selected high-performance crystal oscillator clocks to test the NRL theory.

Nation: USA
Type / Application: Navigation
Operator: US Air Force (USAF) STP (Space Test Program)
Contractors: Naval Research Laboratory (NRL)
Configuration: Gravity Stabilized
Propulsion: Star-24 (jettisonable)
Power: 4 deployable fixed solar arrays, batteries
Mass: 293 kg
Orbit: 13442 km × 13777 km, 125.0
Satellite COSPAR Date LS Launch Vehicle Remarks
NTS 1 (P73-3, OPS 7518, Timation 3) 1974-054A 14.07.1974 Va SLC-3W Atlas-F PTS


Further NTS missions:
Further STP missions:

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