The Advanced Infra-Red WAter Vapour Estimator (AIRWAVE) algorithm has been designed to obtain the Total Column of Water Vapor from the measurements of the Along Track Scanning Radiometer (ATSR) instrument series. The algorithm, independent from external constrains, makes use of a set of tabulated parameters calculated off-line using a Radiative Transfer Model (RTM) specifically developed to simulate the ATSR radiances. The approach exploits the clear sky Brightness Temperature measured over the sea in forward and nadir directions in the TIR channels. The quality of the obtained datasets has been evaluated against independent products derived from space borne sensors (SSM/I) and in situ measurements (ARSA database). On board the Copernicus Sentinel 3 satellite, the Sea and Land Surface Temperature Radiometer (SLSTR) is an advanced version of the ATSR instruments. In the frame of an EUMETSAT project, the AIRWAVE algorithm is being extended to the measurements of SLSTR to produce the SLSTR Level-2 Integrated Water Vapour product. Through this extension, AIRWAVE will have the unique capability to retrieve the TCWV over water surfaces for cloud-free scenarios using only the SLSTR TIR channels, and therefore in both day- and night-time, covering all the water surfaces of the Earth. Here we will describe the work performed to extend the AIRWAVE algorithm to SLSTR measurements and the first results obtained with it.
AIRWAVE-SLSTR: an algorithm to retrieve TCWV from SLSTR measurements over water surfaces
Bianca Maria Dinelli;Elisa Castelli;Enzo Papandrea;
2019
Abstract
The Advanced Infra-Red WAter Vapour Estimator (AIRWAVE) algorithm has been designed to obtain the Total Column of Water Vapor from the measurements of the Along Track Scanning Radiometer (ATSR) instrument series. The algorithm, independent from external constrains, makes use of a set of tabulated parameters calculated off-line using a Radiative Transfer Model (RTM) specifically developed to simulate the ATSR radiances. The approach exploits the clear sky Brightness Temperature measured over the sea in forward and nadir directions in the TIR channels. The quality of the obtained datasets has been evaluated against independent products derived from space borne sensors (SSM/I) and in situ measurements (ARSA database). On board the Copernicus Sentinel 3 satellite, the Sea and Land Surface Temperature Radiometer (SLSTR) is an advanced version of the ATSR instruments. In the frame of an EUMETSAT project, the AIRWAVE algorithm is being extended to the measurements of SLSTR to produce the SLSTR Level-2 Integrated Water Vapour product. Through this extension, AIRWAVE will have the unique capability to retrieve the TCWV over water surfaces for cloud-free scenarios using only the SLSTR TIR channels, and therefore in both day- and night-time, covering all the water surfaces of the Earth. Here we will describe the work performed to extend the AIRWAVE algorithm to SLSTR measurements and the first results obtained with it.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
