Ultraviolet Horizon Sensing From Space

R. E. Huffman; F. J. LeBlanc; D. E. Paulsen; J. C. Larrabee

doi:10.1117/12.959876

3 April 1981 Ultraviolet Horizon Sensing From Space

R. E. Huffman, F. J. LeBlanc, D. E. Paulsen, J. C. Larrabee

Proceedings Volume 0265, Shuttle Pointing of Electro-Optical Experiments; (1981) https://doi.org/10.1117/12.959876
Event: 1981 Los Angeles Technical Symposium, 1980, Los Angeles, United States

Abstract

The radiance of the earth's atmosphere in the ultraviolet can be used for horizon sensing from space. In order to obtain the radiance data to assess this possibility, an experiment utilizing Space Test Program pointing equipment on shuttle is being implemented. The experiment Horizon Ultraviolet Program, (HUP), AFGL-801, will measure the limb profile brightness and its geophysical variability using the STP pointing system and the HUP experiment limb scanner to maximize the viewing opportunities. The best combination of these two scanning methods is to be sought. Scans across the horizon from a tangent altitude of about 250 km will be made with a vertical angular resolution goal of one milliradian. One requirement of the shuttle pointing system is to provide knowledge of the pointing direction equivalent to this resolution. A 20° range is to be scanned in about 10 seconds so that latitudinal variability can be evaluated. The six spectrometers covering the 1100-4000 Å range have many options for viewing including the use of selectable fixed wavelengths and the capability for wavelength scans. The feasibility of combining this relatively small experiment with other experiments on the same flight is discussed.

Citation Download Citation

R. E. Huffman, F. J. LeBlanc, D. E. Paulsen, and J. C. Larrabee "Ultraviolet Horizon Sensing From Space", Proc. SPIE 0265, Shuttle Pointing of Electro-Optical Experiments, (3 April 1981); https://doi.org/10.1117/12.959876

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