Abstract
Polar-orbiting weather satellite platforms generally include an imager and a sounder. With a data fusion method that uses these sensors, we demonstrate the ability to construct infrared (IR) absorption narrowband radiances at imager resolution. While a sensor such as MODIS has multiple IR absorption bands, the current visible infrared imaging radiometer suite (VIIRS) imager has only IR window bands. We show fusion results for IR radiances at 4.52 μm (CO2), 6.72 μm (H2O), and 13.94 μm (CO2) by comparing MODIS observed and constructed radiances for these bands. Both regional and global results are analyzed, with radiance differences tending to be fairly low and unbiased. Similar bands are constructed from VIIRS and CrIS data, with regional and global results shown. With this approach, it will be possible to improve continuity in derived cloud products over the generations of polar-orbiting weather satellite sensors and continue applications that require IR absorption bands.
Highlights
Polar-orbiting weather satellite platforms generally include both a high spatial resolution imager, with pixel spatial resolution on the order of 1 km, and a high spectral resolution infrared (IR) sounder, with fields of view (FOVs) of about 14 km
The basis of our approach is presented in Ref. 3, where a 13.3-μm band is constructed from the fusion of moderate-resolution imaging spectroradiometer (MODIS) plus atmospheric infrared sounder (AIRS) on Aqua and visible infrared imaging radiometer suite (VIIRS) plus cross-track interferometer sounder (CrIS) on the Suomi-National Polarorbiting Partnership platform
We demonstrate that MODIS band 25 (4.5 μm), band 27 (6.7 μm), and band 35 (13.9 μm) can be constructed by combining MODIS and AIRS, and VIIRS and CrIS data
Summary
Polar-orbiting weather satellite platforms generally include both a high spatial resolution imager, with pixel spatial resolution on the order of 1 km, and a high spectral resolution (or hyperspectral) infrared (IR) sounder, with fields of view (FOVs) of about 14 km. Hyperspectral sounders cover a spectral range from ∼3.6 to 15.5 μm (Fig. 1) As it will be shown in the following discussion, there are differences in the satellite imager/sounder measurements across platforms. The same fusion approach can be applied to any other satellite-based imager/sounder pair, for example, advanced very high-resolution radiometer (AVHRR) and HIRS. AVHRR can be paired with infrared atmospheric sounding interferometer (IASI), the hyperspectral sounding instrument on the European Metop-satellites.[2] IASI provides a continuous spectrum (i.e., without any gaps) in the same IR range as AIRS and CrIS. The basis of our approach is presented in Ref. 3, where a 13.3-μm band is constructed from the fusion of MODIS plus AIRS on Aqua and VIIRS plus CrIS on the Suomi-National Polarorbiting Partnership platform.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
