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Observing Systems Capability Analysis and Review Tool
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Space-based Capabilities
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Satellite Programme: TIROS Operational System
Programme details
Programme description
Series of 9 satellites for operational meteorology, follow-on of the experimental TIROS series.
From a historical viewpoint, considered as the 2nd generation of NOAA polar orbiting satellites. Main improvements: operational adoption of the "cartwheel" configuration (as in TIROS-9), of the sunsynchronous orbit (as in TIROS-9 and TIROS-10) and of the real-time dissemination function (as in TIROS-8).
USA programme: ESSA, the predecessor of NOAA, responsible of the overall programme and the operations, NASA responsible of the development of the space segment.
Spin-stabilised satellites, with the spin axis perpendicular to the orbital plane ("cartwheel" configuration) and the cameras mounted on the side, activated when facing the earth.
Design lifetime 1 year.
Sunsynchronous orbits around 9:30 exploited, with two satellites at any time: ESSA 1, 3, 5, 7 and 9 equipped with instruments for stored data, ESSA 2, 4, 6 and 8 equipped for real-time transmission.
Replacement policy based on launching satellites of each series (odd-numbered or even-numbered) at yearly intervals.
See detailed description at
http://nssdc.gsfc.nasa.gov/nmc/SpacecraftQuery.jsp
Data circulation
Selected data of odd-numbered satellites stored onboard and downlinked to the CDA (Command and Data Acquisition station) at Fairbanks.
Data from the even-numbered satellites downlinked in real time to APT receiving stations.
Agencies
NOAA
,
NASA
Programme lifetime
1966 - 1976
Associated satellites and instruments
Note: red tag => no longer operational , green tag => operational , blue tag => planned
TIROS Operational System
ESSA-1
(1966-1967)
FPR
VCS-WA
ESSA-2
(1966-1970)
APT
ESSA-3
(1966-1968)
AVCS
FPR
ESSA-4
(1967-1968)
APT
ESSA-5
(1967-1970)
AVCS
FPR
ESSA-6
(1967-1969)
APT
ESSA-7
(1968-1970)
AVCS
FPR
ESSA-8
(1968-1976)
APT
ESSA-9
(1969-1972)
AVCS
FPR