Radiometric consistency assessment of hyperspectral infrared sounders
The radiometric and spectral consistency among the Atmospheric Infrared Sounder (AIRS), the Infrared Atmospheric Sounding Interferometer (IASI), and the Cross-track Infrared Sounder (CrIS) is fundamental for the creation of long-term infrared (IR) hyperspectral radiance benchmark data sets for both...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2015-11-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | http://www.atmos-meas-tech.net/8/4831/2015/amt-8-4831-2015.pdf |
| _version_ | 1811324348079800320 |
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| author | L. Wang Y. Han X. Jin Y. Chen D. A. Tremblay |
| author_facet | L. Wang Y. Han X. Jin Y. Chen D. A. Tremblay |
| author_sort | L. Wang |
| collection | DOAJ |
| description | The radiometric and spectral consistency among the Atmospheric Infrared
Sounder (AIRS), the Infrared Atmospheric Sounding Interferometer (IASI), and
the Cross-track Infrared Sounder (CrIS) is fundamental for the creation of
long-term infrared (IR) hyperspectral radiance benchmark data sets for both
intercalibration and climate-related studies. In this study, the CrIS
radiance measurements on Suomi National Polar-orbiting Partnership (SNPP)
satellite are directly compared with IASI on MetOp-A and MetOp-B at the finest spectral
scale and with AIRS on Aqua in 25 selected spectral regions through simultaneous
nadir overpass (SNO) observations in 2013, to evaluate radiometric
consistency of these four hyperspectral IR sounders. The spectra from
different sounders are paired together through strict spatial and temporal
collocation. The uniform scenes are selected by examining the collocated
Visible Infrared Imaging Radiometer Suite (VIIRS) pixels. Their brightness
temperature (BT) differences are then calculated by converting the spectra
onto common spectral grids. The results indicate that CrIS agrees well with
IASI on MetOp-A and IASI on MetOp-B at the long-wave IR (LWIR) and middle-wave IR (MWIR)
bands with 0.1–0.2 K differences. There are no apparent scene-dependent
patterns for BT differences between CrIS and IASI for individual spectral
channels. CrIS and AIRS are compared at the 25 spectral regions for both
polar and tropical SNOs. The combined global SNO data sets indicate that the
CrIS–AIRS BT differences are less than or around 0.1 K among 21 of 25
spectral regions and they range from 0.15 to 0.21 K in the remaining four
spectral regions. CrIS–AIRS BT differences in some comparison spectral
regions show weak scene-dependent features. |
| first_indexed | 2024-04-13T14:12:41Z |
| format | Article |
| id | doaj.art-f89c9a685a37455ba3544e70db222c74 |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-04-13T14:12:41Z |
| publishDate | 2015-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-f89c9a685a37455ba3544e70db222c742022-12-22T02:43:44ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482015-11-018114831484410.5194/amt-8-4831-2015Radiometric consistency assessment of hyperspectral infrared soundersL. Wang0Y. Han1X. Jin2Y. Chen3D. A. Tremblay4Earth System Science Interdisciplinary Center/Univ. of Maryland, College Park, MD, USANOAA/NESDIS/Center for Satellite Applications and Research, College Park, MD, USAEarth Resources Technology Inc. at NOAA/NESDIS/STAR, Laurel, MD, USAEarth System Science Interdisciplinary Center/Univ. of Maryland, College Park, MD, USAScience Data Processing Inc. at NOAA/NESDIS/STAR, College Park, MD, USAThe radiometric and spectral consistency among the Atmospheric Infrared Sounder (AIRS), the Infrared Atmospheric Sounding Interferometer (IASI), and the Cross-track Infrared Sounder (CrIS) is fundamental for the creation of long-term infrared (IR) hyperspectral radiance benchmark data sets for both intercalibration and climate-related studies. In this study, the CrIS radiance measurements on Suomi National Polar-orbiting Partnership (SNPP) satellite are directly compared with IASI on MetOp-A and MetOp-B at the finest spectral scale and with AIRS on Aqua in 25 selected spectral regions through simultaneous nadir overpass (SNO) observations in 2013, to evaluate radiometric consistency of these four hyperspectral IR sounders. The spectra from different sounders are paired together through strict spatial and temporal collocation. The uniform scenes are selected by examining the collocated Visible Infrared Imaging Radiometer Suite (VIIRS) pixels. Their brightness temperature (BT) differences are then calculated by converting the spectra onto common spectral grids. The results indicate that CrIS agrees well with IASI on MetOp-A and IASI on MetOp-B at the long-wave IR (LWIR) and middle-wave IR (MWIR) bands with 0.1–0.2 K differences. There are no apparent scene-dependent patterns for BT differences between CrIS and IASI for individual spectral channels. CrIS and AIRS are compared at the 25 spectral regions for both polar and tropical SNOs. The combined global SNO data sets indicate that the CrIS–AIRS BT differences are less than or around 0.1 K among 21 of 25 spectral regions and they range from 0.15 to 0.21 K in the remaining four spectral regions. CrIS–AIRS BT differences in some comparison spectral regions show weak scene-dependent features.http://www.atmos-meas-tech.net/8/4831/2015/amt-8-4831-2015.pdf |
| spellingShingle | L. Wang Y. Han X. Jin Y. Chen D. A. Tremblay Radiometric consistency assessment of hyperspectral infrared sounders Atmospheric Measurement Techniques |
| title | Radiometric consistency assessment of hyperspectral infrared sounders |
| title_full | Radiometric consistency assessment of hyperspectral infrared sounders |
| title_fullStr | Radiometric consistency assessment of hyperspectral infrared sounders |
| title_full_unstemmed | Radiometric consistency assessment of hyperspectral infrared sounders |
| title_short | Radiometric consistency assessment of hyperspectral infrared sounders |
| title_sort | radiometric consistency assessment of hyperspectral infrared sounders |
| url | http://www.atmos-meas-tech.net/8/4831/2015/amt-8-4831-2015.pdf |
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