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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Thermal-Distortion Analysis of an Antenna Strongback for Geostationary High-Frequency Microwave Applications

Thermal-Distortion Analysis of an Antenna Strongback for Geostationary High-Frequency Microwave Applications

Nasa, National Aeronautics and Space Adm

Paperback

Astronomy & Space

Currently unavailable to order

ISBN10: 1728898854
ISBN13: 9781728898858
Publisher: Independently Published
Published: Oct 18 2018
Pages: 30
Weight: 0.21
Height: 0.06 Width: 8.50 Depth: 11.02
Language: English
The global change technology initiative calls for a geostationary platform for Earth science monitoring. One of the major science instruments is the high frequency microwave sounder (HFMS) which uses a large diameter, high resolution, high frequency microwave antenna. This antenna's size and required accuracy dictates the need for a segmented reflector. On-orbit disturbances may be a significant factor in its design. A study was performed to examine the effects of the geosynchronous thermal environment on the performance of the strongback structure for a proposed antenna concept for this application. The study included definition of the strongback and a corresponding numerical model to be used in the thermal and structural analyses definition of the thermal environment, determination of structural element temperature throughout potential orbits, estimation of resulting thermal distortions, and assessment of the structure's capability to meet surface accuracy requirements. Analyses show that shadows produced by the antenna reflector surface play a major role in increasing thermal distortions. Through customization of surface coating and element expansion characteristics, the segmented reflector concept can meet the tight surface accuracy requirements. Farmer, Jeffrey T. and Wahls, Deborah M. and Wright, Robert L. Langley Research Center RTOP 506-49-21-02...

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