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Evaluation of the dual differential radiometer for remote sensing of sediment and chlorophyll in turbid watersThe dual differential radiometer (DDR) was tested to determine its capability for measuring suspended sediment and chlorophyll in turbid waters. Measurements were obtained from a boat dock and from a helicopter with combinations of sample and reference filters with peak transmissions at various wavelengths. Water samples were taken concurrently and were analyzed for light scattering, particle count, and total chlorophyll. Least-squares estimates of the linear relationship between DDR output and the water parameters yielded correlation coefficients of less than 0.7. Under the turbid water conditions of the present tests, the DDR did not accurately measure either suspended sediment or chlorophyll. A precise knowledge of the spectral signatures of various pollutants might enable appropriate filters to be selected for tuning the DDR to monitor a particular pollutant.
Document ID
19760045119
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Witte, W. G.
(NASA Langley Research Center Hampton, Va., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1975
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Remote sensing of earth resources. Volume 4
Location: Tullahoma, TN
Start Date: March 24, 1975
End Date: March 26, 1975
Accession Number
76A28085
Distribution Limits
Public
Copyright
Other

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