文章基本信息

标题：Solar-Blind Ultraviolet Upwelling Radiance Diurnal Variation Led by Observation Geometry Factors on Geostationary Attitude Sensor Limb Viewing
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作者：Chun-guang Lyu ; Jia Tian ; Wen-bo Yang 等
期刊名称：Terrestrial Atmospheric and Oceanic Sciences
印刷版ISSN：1017-0839
出版年度：2016
卷号：27
期号：6
页码：943-953
DOI：10.3319/TAO.2016.05.11.01(AA)
出版社：Chinese Geoscience Union
摘要：In this satellite autonomous navigation feasibility study on geostationary orbit using the ultraviolet (UV) attitude sensor, the solar-blind UV (SBUV) upwelling radiance spatial distributions from the Earth surface points or the limb viewing path are simulated every two hours in all seasons based on the MODTRAN4 model. The target points are arranged from where the sensor can receive the Earth’s radiance, including eight limb viewing points in the 0 - 90 km altitude range with an interval of 5 km and nine surface points. A hypothetical UV attitude sensor with 9.6° field of view is set at a geostationary orbit, 3.6 × 107 m away from Equator sea level. The nadir point of which is considered to be located at 102°E and the Equator. The results show that SBUV (200 - 280 nm) upwelling radiance from the limb viewing points can increase to a maximum and then decrease with the increase in limb points altitude. The average SBUV radiance on the observation plane presents a regular bright crescent or ring, which has the maximum at about 0.433 W m -2 sr -1 μm -1 at 50 - 60 km altitude. The maximum upwelling radiance in the 242 - 267 nm spectra has the optimal characteristic considering the contrast and maximum altitude radiance continuity at the limb points.
关键词：Passive remote sensing; Optical spectrum analysis; Solar blind ultraviolet; Limb viewing; MODTRAN4; Geostationary orbit;