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STPSat 5 is a planned experimental spacecraft for the Department of Defense's Space Test Program (STP).

STPSat-5 will carry a total of four technological or scientific payloads to low-Earth orbit in order to further the DoD’s understanding of the space environment. The experiments are chosen by the DoD Space Experiment Review Board.

The satellite is based on SNC's SN-50 bus, which is compatible both with dedicated launch vehicles and ESPA-class secondary launch adaptors.

Among the experiments selected is iMESA-R (Integrated Miniaturized Electrostatic Analyzer Reflight), a U.S. Air Force Academy mission designed to measure plasma densities and energies.

Alternate Names

  • 43762

Facts in Brief

Launch Date: 2018-12-03
Launch Vehicle: Falcon 9 Full Thrust
Launch Site: Vandenberg AFB, United States

Funding Agency

  • United States Air Force Academy (United States)


  • Technology Applications

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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