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Sources of errors in the measurements of underwater profiling radiometer

Silveira, N and Suresh, T and Talaulikar, M and Desa, E and Prabhu Matondkar, SG and Lotlikar, A (2014) Sources of errors in the measurements of underwater profiling radiometer. Indian Journal of Marine Sciences, 43 (1). pp. 88-95.

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Abstract

There are various sources of errors from the measurements of optical parameters using a radiometer, which can be classified as mode of deployment, instrument and environment. The errors from the deployment are primarily from the ship and superstructure shadows. Instrument could be a source of error arising from its self-shadow, drift in the calibration and temperature effects. There could be large errors, which at times may be unavoidable to environment factors such as wave focusing at the surface layers, sea state conditions which may affect the tilt of the instrument, atmospheric conditions such as cloud cover, solar elevation, wind and rain. Radiometric optical data in water could also get affected due to Raman scattering and fluorescence effects. Here we discuss the above sources of errors and how they could be minimized. From the measurements carried out in the coastal waters off Goa and Arabian Sea using the hypespectral radiometer, we propose simple protocol to measure the data and also screen the erroneous data measured from the radiometer.

Item Type: Article
Additional Information: Copyright of this article belongs to CSIR-NISCAIR.
Uncontrolled Keywords: accuracy assessment; calibration; cloud cover; environmental conditions; environmental factor; error analysis; fluorescence; profiler; radiometer; shipborne measurement; temperature effect; underwater environment; wave scattering; accuracy assessment; coastal water; data set; environmental factor; error analysis; optical property; radiometer; scattering; underwater vehicle, Arabian Sea; Goa; India; Indian Ocean; Arabian Sea; Goa; India; Indian Ocean
Subjects: Oceanography > oceanography
Depositing User: INCOIS Library
Date Deposited: 17 Jul 2014 07:25
Last Modified: 17 Jul 2014 07:25
URI: http://moeseprints.incois.gov.in/id/eprint/625

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