Evidence of pre-launch characterization problem of Meteosat-7 visible spectral response
| dc.contributor.author | Decoster, I. | |
| dc.contributor.author | Clerbaux, N. | |
| dc.contributor.author | Govaerts, Y. | |
| dc.contributor.author | Baudrez, E. | |
| dc.contributor.author | Ipe, A. | |
| dc.contributor.author | Dewitte, S. | |
| dc.contributor.author | Nevens, S. | |
| dc.contributor.author | Velazquez-Blazquez, A. | |
| dc.contributor.author | Cornelis, J. | |
| dc.coverage.temporal | 21st century | |
| dc.date | 2013 | |
| dc.date.accessioned | 2016-03-07T16:17:08Z | |
| dc.date.accessioned | 2021-12-09T09:54:33Z | |
| dc.date.available | 2016-03-07T16:17:08Z | |
| dc.date.available | 2021-12-09T09:54:33Z | |
| dc.identifier.uri | https://orfeo.belnet.be/handle/internal/8932 | |
| dc.description | Since the early 1980s, the geostationary Meteosat instruments have been observing the earth at a high temporal and spatial resolution. The data record contains more than 30 years of observations and has become very useful for climate monitoring. With a compilation of 10 satellites, it is crucial to reach the highest possible consistency between the instruments. However, the quality of the level 1 data records is still far from what is needed to generate homogeneous climate data records, due to both temporal ageing as well as discontinuities between successive instruments. In this letter, a method is proposed to assess the pre-launch Meteosat-7 visible spectral response curve and a model of its ageing. The results not onldy validate the ageing model, but also provide evidence that the official pre-launch spectral response curve of Meteosat-7 poorly represents the sensitivity of the instrument in the blue part of the visible spectrum. Until the Meteosat-7 visible spectral response curve has been reassessed, it is suggested to replace the Meteosat-7 curve with the curve of the high resolution visible channel of Meteosat-8. Quantitatively, the error introduced when unfiltering the data (i.e. conversion from filtered to unfiltered radiance), due to the uncertainty on the Meteosat-7 spectral response, is estimated at 4.5% using the Meteosat-7 spectral response curve, but could be reduced to 2.1% by following the recommendations in this letter. | |
| dc.language | eng | |
| dc.publisher | IRM | |
| dc.publisher | KMI | |
| dc.publisher | RMI | |
| dc.relation.ispartofseries | Remote Sensing Letters, 4(10) | |
| dc.title | Evidence of pre-launch characterization problem of Meteosat-7 visible spectral response | |
| dc.type | Article | |
| dc.subject.frascati | Earth and related Environmental sciences | |
| dc.audience | General Public | |
| dc.audience | Scientific | |
| dc.subject.free | 1980 | |
| dc.subject.free | the geostationary Meteosat instruments | |
| dc.subject.free | Climate monitoring | |
| dc.subject.free | Meteosat-7 spectral response | |
| dc.source.issue | Remote Sensing Letters, 4(10) | |
| dc.source.page | 1008-1017 | |
| Orfeo.peerreviewed | Not pertinent |
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