BackForward Satellite: ESSA-4 

Satellite details
Acronym ESSA-4
Full name Environmental Science and Services Administration - 4
Satellite Description
  • 4th flight unit of the TOS programme.
  • Main mission: cloud imagery.
Mass at launch 285 kg Dry mass
Data access link no link provided
Data access information
  • Data available in real-time to APT stations.
Orbit Sunsynchronous orbit Altitude 1380 km
ECT 09:30 desc


Space agency NOAANASA
Status Inactive
Details on Status
(as available)
Launch 26 Jan 1967 EOL 05 May 1968
Last update: 2015-07-27
Associated satellite programme and related satellites

Note: red tag: no longer operational , green tag: operational , blue tag : future

Satellite Payload

All known Instruments flying on ESSA-4

Acronym Full name
APT Automatic Picture Transmission
Show instrument status and calibration