27 December 1995 Potential uses of along-track scanning radiometer data for cloud parameter retrieval
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Abstract
The ATSR-1 is an infrared radiometer designed principally to measure sea surface temperature from space to an unprecedented accuracy (<0.3 K) to meet the needs of the climate research community. To achieve this, a conical scan is employed resulting in two views of the same surface scene; a 'nadir' view with a zenith angle at the surface of between 0 and 25°, and a 'forward' view with a zenith angle from 52 to 55°. Upwelling radiance at wavelengths centred around 1 .6, 3.7, 1 1 and 12 jim are measured at each view angle for a nominal surface pixel size of approximately 1 km (the forward view pixels are about twice as large because of the geometry). Thus the atmospheric effect on the radiances can be removed and the sea surface temperature measured by using both spectral and multi-path information. The 1.6 jim channel operates only during the daytime (at the expense of the 3.7 tm channel) and is included primarily to aid in the cloud-clearing process. ATSR-2, launched June 1995, carries additionally, three visible wavelength channels; 0.55,0.67 and 0.87 rim. These were added to meet the growing needs of the land resources research community. This paper explores some of the possibilities offered by ATSR-1 and -2 data for retrieval of cloud microphysical and bulk parameters.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Philip D. Watts "Potential uses of along-track scanning radiometer data for cloud parameter retrieval", Proc. SPIE 2578, Passive Infrared Remote Sensing of Clouds and the Atmosphere III, (27 December 1995); doi: 10.1117/12.228947; https://doi.org/10.1117/12.228947
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