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Mission typeCommunications
OperatorU.S. Naval Academy
COSPAR ID2019-036R[1]
SATCAT no.44354
Mission duration3 years, 11 months and 3 days
Spacecraft properties
BusCubeSat (1.5U)
Launch mass2 kilograms (4.4 lb)
Start of mission
Launch date25 June 2019, 06:30 (2019-06-25UTC06:30) UTC
RocketFalcon Heavy
Launch siteKennedy LC-39A[2]
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Semi-major axis6,941.0 kilometres (4,312.9 mi)
Perigee altitude309.8 kilometres (192.5 mi)
Apogee altitude831.1 kilometres (516.4 mi)
Period95.9 minutes
Epoch3 February 2020[3]

PSAT-2 is an experimental amateur radio satellite from the U.S. Naval Academy, which was developed in collaboration with the Technical University of Brno in Brno, Czech Republic. AMSAT North America's OSCAR number administrator assigned number 104 to this satellite; in the amateur radio community it is therefore also called Navy-OSCAR 104, short NO-104.


PSAT-2 was launched on June 25, 2019 with a Falcon Heavy from Kennedy Space Center, Florida, United States, as part of Mission STP-2 (Space Test Program 2) as one of 24 satellites. In August of 2019, the VHF payload failed and control of the satellite was lost. However, after nearly two years of downtime, the payload mysteriously reactivated and control was regained.


The following frequencies for the satellite were coordinated by the International Amateur Radio Union:

See also


  1. ^ Jonathan McDowell. "Launch Log". Jonathan's Space Page. Retrieved 3 February 2020.
  2. ^ Gunter Dirk Krebs. "PSat 2 (Navy-OSCAR 104 / NO 104)". Gunter's Space Page. Retrieved 3 February 2020.
  3. ^ "OBJECT U". Retrieved 3 February 2020.