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Gravity Gradient Technology Satellite

From Wikipedia, the free encyclopedia

Gravity Gradient Test Satellite (GGTS)
Gravity Gradient Technology Satellite (GGTS).jpg
Gravity Gradient Technology Satellite (GGTS)
Mission typeGravity-gradient stabilization
OperatorUnited States Air Force
COSPAR ID1966-053A
SATCAT no.2207[1]
Spacecraft properties
Launch mass47 kilograms (104 lb)
Start of mission
Launch dateJune 16, 1966 (1966-06-16Z) 14:00:01 UTC
RocketTitan IIIC
Launch siteCape Canaveral LC41
Orbital parameters
Reference systemGeocentric
RegimeGeosynchronous
Perigee altitude33,663 kilometers (20,917 mi)
Apogee altitude33,858 kilometers (21,038 mi)
Inclination4.2°
Period1,334.00 minutes[2]
 

The Gravity Gradient Test Satellite was launched by the US Air Force from Cape Canaveral LC41 aboard a Titan IIIC rocket on June 16, 1966 at 14:00:01 UTC.[3] The satellite was launched along with seven IDCSP satellites, with which it shared a bus. In contrast to the solar-powered IDCSP satellites, GGTS was battery powered.

GGTS utilized the 12-kilogram (26 lb) Magnetically Anchored Gravity Systems (MACS), which consisted of two identical subsystem packages, each containing an extensible rod unit and a magnetically anchored spherical viscous damper. The rod units had an extended length of 15.8 meters (52 ft), and their 5-kilogram (11 lb) damper tip weights gave the satellite a symmetric dumbbell configuration. The dampers were produced by General Electric and consisted of two concentric spheres separated by a viscous damping fluid. The internal sphere contained a hollow cylindrical magnet which served to "anchor' the inner sphere to the Earth's magnetic field, stabilizing the satellite over time.

It had been hoped that within 60 days of launch, the satellite would reach a stabilization of ±8° on the x- and y-axis. The results were compromised, as one of the dampers was magnetically contaminated.

A follow-up GGTS mission was lost due to a launch vehicle failure on August 28, 1966.[4]

See also

References

  1. ^ "GGTS 1". NASA Space Science Data Coordinated Archive. Retrieved November 21, 2019.
  2. ^ "GGTS". Astronautix. Retrieved November 22, 2019.
  3. ^ McDowell, Jonathan. "Launch Log". Jonathon's Space Report. Retrieved December 30, 2018.
  4. ^ "GGTS 1,2". Gunter's Space Report. Retrieved 22 Nov 2019.
This page was last edited on 22 November 2019, at 05:20
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