IASI: Difference between revisions
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| name = Infrared Atmospheric Sounding Interferometer | | name = Infrared Atmospheric Sounding Interferometer | ||
| acronym = IASI | | acronym = IASI | ||
| orbit = | | orbit = | ||
| measurement period= 29 May 2007 - | | measurement period= 29 May 2007 - Present | ||
|measurement principle=Fourier transform spectrometer<br>(3.6 -15.5 μm) | | measurement principle=Fourier transform spectrometer<br>(3.6 - 15.5 μm) | ||
|agency=ESA | | agency=ESA | ||
|image = | | image = | ||
|satellite=MetOp-A, MetOp-B | | satellite=MetOp-A, MetOp-B | ||
|launch date = 2006 | | launch date = 2006, 2012 | ||
}} | }} | ||
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It crosses the equator on the descending node at 9:30 a.m. | It crosses the equator on the descending node at 9:30 a.m. | ||
local time. IASI is a Fourier transform spectrometer that | local time. IASI is a Fourier transform spectrometer that | ||
covers the spectral range 645 to 2760 | covers the spectral range 645 to 2760 cm<sup>−1</sup> (3.62 – 15.5 μm) | ||
with a spectral sampling of 0.25 | with a spectral sampling of 0.25 cm<sup>−1</sup> and an apodized spectral | ||
resolution of 0.5 | resolution of 0.5 cm<sup>−1</sup> (Blumstein et al., 2004).<ref> | ||
Blumstein, D., Chalon, G., Carlier, T., Buil, C., H´ebert, P., Maciaszek, | Blumstein, D., Chalon, G., Carlier, T., Buil, C., H´ebert, P., Maciaszek, | ||
T., Ponce, G., Phulpin, T., Tournier, B., Sim´eoni, D., PAstruc, | T., Ponce, G., Phulpin, T., Tournier, B., Sim´eoni, D., PAstruc, | ||
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overview and measured performances, Proc. SPIE, 5543, | overview and measured performances, Proc. SPIE, 5543, | ||
196–207, 2004. </ref> | 196–207, 2004. </ref> | ||
It is specified to have a radiometric accuracy of 0. | It is specified to have a radiometric accuracy of 0.25 – 0.58 K and | ||
a field-of-view of 12 km at nadir. It has a 2200 km wide | a field-of-view of 12 km at nadir. It has a 2200 km wide | ||
swath and achieves near uniform global coverage in 12 h (although | swath and achieves near uniform global coverage in 12 h (although | ||
Latest revision as of 16:20, 7 November 2013
| Infrared Atmospheric Sounding Interferometer | |
|---|---|
| Satellite | MetOp-A, MetOp-B |
| Agency | ESA |
| Launch Date | 2006, 2012 |
| Measurement Period | 29 May 2007 - Present |
| Measurement Principle |
Fourier transform spectrometer (3.6 - 15.5 μm) |
IASI is a satellite Fourier Transform InfraRed spectroscopy (FTIR) instrument.
IASI is on-board MetOp-A, a European meteorological satellite that has been operational from 2007. MetOp-A is the first of three satellites that are planned to operate for fourteen years (MetOp-B was lauched on 17 September 2013). It crosses the equator on the descending node at 9:30 a.m. local time. IASI is a Fourier transform spectrometer that covers the spectral range 645 to 2760 cm−1 (3.62 – 15.5 μm) with a spectral sampling of 0.25 cm−1 and an apodized spectral resolution of 0.5 cm−1 (Blumstein et al., 2004).[1] It is specified to have a radiometric accuracy of 0.25 – 0.58 K and a field-of-view of 12 km at nadir. It has a 2200 km wide swath and achieves near uniform global coverage in 12 h (although there are some gaps between orbits near the Equator). More information on IASI can be founded in Clerbaux et al. (2009).[2]
IASI level 1c data (geolocated and apodized spectra) can be obtained from both the British Atmospheric Data Centre (BADC) archive [3] and EUMETSAT Unified Meteorological Archive Facility (UMARF) archive [4].
References
- ↑ Blumstein, D., Chalon, G., Carlier, T., Buil, C., H´ebert, P., Maciaszek, T., Ponce, G., Phulpin, T., Tournier, B., Sim´eoni, D., PAstruc, Clauss, A., Kayal, G., and Jegou, R.: IASI Instrument: Technical overview and measured performances, Proc. SPIE, 5543, 196–207, 2004.
- ↑ Clerbaux, C., Boynard, A., Clarisse, L., George, M., Hadji-Lazaro, J., Herbin, H., Hurtmans, D., Pommier, M., Razavi, A., Turquety, S., Wespes, C., and Coheur, P.-F.: Monitoring of atmospheric composition using the thermal infrared IASI/MetOp sounder, Atmos. Chem. Phys., 9, 6041–6054, doi:10.5194/acp-9-6041-2009, 2009.
- ↑ http://badc.nerc.ac.uk/home/index.html
- ↑ https://eoportal.eumetsat.int/