Tacsat

Also called OPS 0757

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General

Designation	03691 / 69013A
Launch date	9 Feb 1969
Country of origin	United States
Mission	Military
Geostationary orbit
Launch vehicle	Titan 3C #35

Used by the US military to demonstrate the feasibility of using synchronous satellites for tactical communications with mobile military field units, aircraft, and ships.

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End of life

Out of service

16 Dec 1972

Technical data

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Specifications

Prime contractor	Hughes
Platform
Mass at launch
Mass in orbit
Dimension	2.8 m diameter
Solar array
Stabilization	spin-stabilized
DC power
Design lifetime

3 antenna systems: an array of five UHF helices, two microwave horns for X-band communications, and a biconical horn for telemetry and command.

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UHF-band

Main transponders	1
Backup transponders
Power	7.5 W (SSTA)
Bandwidth
Coverage
EIRP max
G/T max
Polarization

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X-band

Main transponders	1
Backup transponders
Power	1 W TWTA
Bandwidth
Coverage
EIRP max
G/T max
Polarization

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