In a joint research project between the National Institute of Oceanography and Atmospheric Sciences, the Royal Netherlands Institute for Marine Research and the Faculty of Biology, Chemistry and Earth Sciences of the University of Bayreuth, Germany, the quality of the coastal waters of the Dutch Wadden Sea in the North of the Netherlands using remote sensing technology, was studied.
According to RCO News Agency, Dr. Masoud Moradi, head of the Research Institute of Atmospheric Sciences and the researcher of this research, said: In this research project, the hyperspectral data collected from the coastal waters of the region were evaluated over a period of 18 years and every 10 minutes. It was used to verify satellite information.
Moradi stated: In this research plan, which included controlling the quality of hyperspectral data, developing guidelines for water quality monitoring in coastal areas, extracting models for water quality components, determining the bio-optical characteristics of coastal waters, and finally satellite monitoring of coastal waters, a study was carried out in different phases. The quality control of the collected water level hyperspectral data was done and the result was published in one of the prestigious international journals entitled “ISPRS Journal of Photogrammetry and Remote Sensing”, which is part of the top 10% list of journals in the field of remote sensing with penetration factor (IF) higher than 10, it has been published.
He continued: Measuring water surface spectra in the range of visible to infrared wavelengths is one of the new methods of monitoring water quality in coastal waters, lakes, rivers and dams. Also, the results obtained from the spectral measurements of the water level are also used to correct the satellite measurements. Since the level of reflected energy recorded by satellites from water environments is low, therefore, the use of different satellite sensors to monitor water environments is always accompanied by many errors, which makes the results sometimes unusable.
A member of the scientific staff of the National Research Institute of Oceanography regarding the application of hyperspectral measurements of the water level stated: these measurements are used to correct the errors of satellite sensors of water environments and the reflective spectra of the water surface using fixed and moving sensors installed on Floats are done.
He added: A water level spectral measurement package consists of at least five sensors with the ability to record hyperspectral reflections of solar radiation, oblique sky radiation and water surface reflection, the last two of which are connected in pairs on the west and east sides with ninety degree angles to each other. is
Quoting from the public relations of the National Research Institute of Oceanography, Moradi expressed the automatic and continuous recording of hyperspectral data of the water level and said: the environmental and weather conditions have a great impact on the recorded spectra and cause sometimes low-quality spectra. or registered as unusable. In this sense, controlling the quality of water surface hyperspectral data is one of the first measures before using these data to monitor aquatic environments.
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