Open Access Digital Repository of Ministry of Earth Sciences, Government of India

Remote sensing of spectral signatures of tropospheric aerosols

Potdar, MB and Sharma, SA and Parikh, VY and Devara, PCS and Raj, PE and Tiwari, YK and Maheskumar, RS and Dani, KK and Saha, SK and Sonbawne, SM and Rao, YJ and Pandithurai, G (2004) Remote sensing of spectral signatures of tropospheric aerosols. Proceedings of the Indian Academy of Sciences, Earth and Planetary Sciences, 113 (1). pp. 103-116.

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With the launch of the German Aerospace Agency's (DLR) Modular Opto-electronic Scanner (MOS) sensor on board the Indian Remote Sensing satellite (IRS-P3) launched by the Indian Space Research Organization (ISRO) in March 1996, 13 channel multi-spectral data in the range of 408 to 1010nm at high radiometric resolution, precision, and with narrow spectral bands have been available for a variety of land, atmospheric and oceanic studies. We found that these data are best for validation of radiative transfer model and the corresponding code developed by one of the authors at Space Applications Centre, and called ATMRAD (abbreviated for ATMospheric RADiation). Once this model/code is validated, it can be used for retrieving information on tropospheric aerosols over ocean or land. This paper deals with two clear objectives, viz., (1) Validation of ATMRAD model/code using MOS data and synchronously measured atmospheric data, and if found performing well, then to (2) derive relationship between MOS radiances and Aerosol Optical Thickness (AOT). The data validation procedure essentially involves near-synchronous measurements of columnar aerosol optical thickness and altitude profiles of aerosol concentration using ground-based multi-filter solar radiometers and Argon-ion Lidar, respectively and computation of the top-of-the-atmosphere (TOA) radiances from a low reflecting target (near clear water reservoir in the present study) using the ATMRAD model. The results show that the model performance is satisfactory and a relationship between the spectral parameters of MOS radiances and aerosol optical thickness can be established. In this communication, we present the details of the experiments conducted, database, validation of the ATMRAD model and development of the relationship between AOT and MOS radiance.

Item Type: Article
Additional Information: Copyright of this article belongs to Indian Academy of Science
Uncontrolled Keywords: aerosol; IRS (satellite); remote sensing; troposphere
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 18 Apr 2015 16:34
Last Modified: 18 Apr 2015 16:34

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