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The PAC 1 (Package Attitude Control) system was carried piggyback on a Delta-N second stage during the August 9, 1969, launch of the OSO 6 satellite. It remained intentionally attached to the Delta stage.

PAC was inserted into orbit (547 × 483 km) to flight test a long-life, low-power, three-axis, earth-stabilized control system for the Delta second stage and to demonstrate the feasibility of using this stage as a platform for experimental payloads.

Nation: USA
Type / Application: Technology
Operator: NASA Goddard Space Flight Center
Contractors: NASA Goddard Space Flight Center
Configuration: Experiments on Delta second stage
Propulsion: None in orbit
Power: Solar cells, batteries
Orbit: 486 km × 553 km, 32.96
Satellite COSPAR Date LS Launch Vehicle Remarks
PAC 1 (PAC A) 1969-068B 09.08.1969 CC LC-17A Delta-N with OSO 6


  • NSSDC Master Catalog: PAC-A