Timed

Thermosphere, Ionosphere, Mesosphere Energy and Dynamics

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General

Designation	26998 / 01055B
Launch date	7 Dec 2001
Country of origin	United States
Operator	NASA
Mission	Scientific: Mesosphere and Lower Thermosphere/ ionosphere study
Perigee/Apogee	630 km
Inclination	74.1°
Period	97.3 min
Launch vehicle	Delta 2 #289

It will obtain global measurements of geophysical parameters of the lower thermosphere, ionosphere, and mesosphere and will be used to determine the seasonal and annual variations of these regions. Will carry 4 instruments.

Design and development: Johns Hopkins University Applied Physics Laboratory. Cost: $193 million + $42 million for data analysis. Part of NASA's Solar Terrestrial Probe program.

The mission duration was extended repetedly through 2014.

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External resources

http://www.timed.jhuapl.edu/

sat-index articles

Technical data

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Specifications

Prime contractor	APL
Platform
Mass at launch	587 kg
Mass in orbit
Dimension	2.72 x 1.61 (11.73 deployed) x 1.2 m
Solar array
Stabilization	3-axis
DC power	EOL: 406 W
Design lifetime	2 years

4 Mbps downlink

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Payloads

Timed Dopplet Interferometer (TIDI)
Solar Extreme Ultraviolet Experiment (SEE)
Souding of the Atmosphere Using Broadband Emission Radiometry (SABER)
Global Ultravionel Imager (GUVI)

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