Engineering topics

Zurmehly, G. E.

Publications and source records attributed to Zurmehly, G. E..

3 records

NASA NTRS1992

Scanning mirror design considerations for a geostationary spaceborne radiometer

This paper will address the design considerations and challenges for a radiometer scanning mirror in a Geostationary (GEO) orbit. With increasingly demanding imaging requirements, mirror designs that are insensitive to the harsh thermal environment will be required. The compatibility of various mirror designs for a precision radiometer will be examined and discussed. The design solutions considered will include material, geometry and thermal design tradeoffs.

Hookman, R. A.↗

NASA NTRS1991

Thermal and structural analysis of the GOES scan mirror's on orbit performance

The on-orbit performance of the GOES satellite's scan mirror has been predicted by means of thermal, structural, and optical models. A simpler-than-conventional thermal model was used to reduce the time required to obtain orbital predictions, and the structural model was used to predict on-earth gravity sag and on-orbit distortions. The transfer of data from the thermal model to the structural model was automated for a given set of thermal nodes and structural grids.

Zurmehly, G. E.↗

NASA NTRS1989

Thermal/optical test setup for the Geostationary Operational Environmental Satellite Telescope

The Geostationary Operational Environmental Satellite (GOES) Telescope is designed to be passively temperature compensated so that focus requirements will be met over a broad range of temperatures. Concerns over the effects of temperature gradients on the optical performance of the telescope and the repeatability of the 'pointing error' of the telescope spawned the need for a detailed thermal/optical test. The telescope temperature compensation system, the thermal environment in which it must work and the test setup used to measure optical performance under varying temperature conditions are discussed in this paper.

Zurmehly, G. E.↗