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Abstract

This paper presents a comparative study of three substantially different atmospheric correction algorithms, applied to the interpretation of TM images of the coastal waters around the Gulf of Naples. The area was selected because extensive series of in-situ measurements carried out at the time of four LANDSAT 5 passes (chlorophyll, total suspended sediment and yellow substance concentrations, in-water optical parameters) provided an excellent reference set for the validation of the theoretical models. The three atmospheric correction algorithms considered were based on the following assumptions: 1.horizontally uniform atmosphere; 2.horizontally varying aerosol load but constant aerosol type; 3.horizontally varying aerosol load and type. All the algorithms tested have proven to be generally valid but for each there are criteria for use depending on the local conditions. Comparison with the available sea data has given quantitative results, whose validity was generalised with the aid of numerical simulations using sensitivity analysis techniques.

Additional information

Authors: TASSAN S, JRC Ispra Estab. (IT)
Bibliographic Reference: Paper presented: EARSel 9th Symposium, Espoo (FI), June 27 - July 1, 1989
Availability: Available from (1) as Paper EN 34712 ORA
Record Number: 198910542 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en