Operational calibration of the Meteosat radiometer VIS band

Govaerts, Yves; Clerici, M.; Clerbaux, Nicolas

doi:10.1109/tgrs.2004.831882

Cited by 61 publications

(55 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…"Calibration" and inter-calibration of satellite instruments are an essential pre-requisite for homogeneous and stable time series. Please see [51,74,75] and references therein for further details. Hereafter, some specific "calibration" issues are briefly discussed in order to enable a better understanding, without aiming for a detailed scientific discussion.…”

Section: Homogeneity/stability Of Cdrsmentioning

confidence: 99%

“…With this method gauge adjustment (inter-calibration) of the instruments is performed by comparison of reflectances for "stable" targets (e.g., desert & cloud targets). A vicarious calibration is applied by Eumetsat [75] for SEVIRI onboard of MSG (starting with Meteosat-8), but has been not performed during the operation of the MVIRI instruments. Here, only a smooth transition between Meteosat-5 -6 and -7 has been generated by intercomparison and adjustment of the observed reflectances, which does not resolve the degradation issues.…”

Section: Homogeneity/stability Of Cdrsmentioning

confidence: 99%

See 1 more Smart Citation

Digging the METEOSAT Treasure—3 Decades of Solar Surface Radiation

et al. 2015

View full text Add to dashboard Cite

Solar surface radiation data of high quality is essential for the appropriate monitoring and analysis of the Earth's radiation budget and the climate system. Further, they are crucial for the efficient planning and operation of solar energy systems. However, well maintained surface measurements are rare in many regions of the world and over the oceans. There, satellite derived information is the exclusive observational source. This emphasizes the important role of satellite based surface radiation data. Within this scope, the new satellite based CM-SAF SARAH (Solar surfAce RAdiation Heliosat) data record is discussed as well as the retrieval method used. The SARAH data are retrieved with the sophisticated SPECMAGIC method, which is based on radiative transfer modeling. The resulting climate data of solar surface irradiance, direct irradiance (horizontal and direct normal) and clear sky irradiance are covering 3 decades. The SARAH data set is validated with surface measurements of the Baseline Surface Radiation Network (BSRN) and of the Global Energy and Balance Archive (GEBA). Comparison with BSRN data is performed in order to estimate the accuracy and precision of the monthly and daily means of solar surface irradiance.The SARAH solar surface irradiance shows a bias of 1.

show abstract

Section: Homogeneity/stability Of Cdrsmentioning

confidence: 99%

Section: Homogeneity/stability Of Cdrsmentioning

confidence: 99%

Digging the METEOSAT Treasure—3 Decades of Solar Surface Radiation

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The transition between the absolute levels of MFG-7 and the previous satellites relies on the SSCC method. The method has an estimated accuracy of 6% when applied to the MVIRI instrument [15]. Part of the SSCC uncertainty is expected to be systematic and to cancel when the SSCC is used to inter-calibrate MFG-2 to -6 with respect to MFG-7.…”

Section: Calibration Uncertaintymentioning

confidence: 99%

The CM SAF TOA Radiation Data Record Using MVIRI and SEVIRI

et al. 2017

View full text Add to dashboard Cite

Abstract:The CM SAF Top of Atmosphere (TOA) Radiation MVIRI/SEVIRI Data Record provides a homogenised satellite-based climatology of TOA Reflected Solar (TRS) and Emitted Thermal (TET) radiation in all-sky conditions over the Meteosat field of view. The continuous monitoring of these two components of the Earth Radiation Budget is of prime importance to study climate variability and change. Combining the Meteosat MVIRI and SEVIRI instruments allows an unprecedented temporal (30 min/15 min) and spatial (2.5 km/3 km) resolution compared to, e.g., the CERES products. It also opens the door to the generation of a long data record covering a 32 years time period and extending from 1 February 1983 to 30 April 2015. The retrieval method used to process the CM SAF TOA Radiation MVIRI/SEVIRI Data Record is discussed. The overlap between the MVIRI and GERB instruments in the period 2004-2006 is used to derive empirical narrowband to broadband regressions. The CERES TRMM angular dependency models and theoretical models are respectively used to compute the TRS and TET fluxes from the broadband radiances. The TOA radiation products are issued as daily means, monthly means and monthly averages of the hourly integrated values (diurnal cycle). The data is provided on a regular grid at a spatial resolution of 0.05 degrees and covers the region 70 • N-70 • S and 70 • W-70 • E. The quality of the data record has been evaluated by intercomparison with several references. In general, the stability in time of the data record is found better than 4 Wm −2 and most products fulfill the predefined accuracy requirements.

show abstract

“…For the WV and IR channels of the MVIRI instruments, different vicarious calibrations have been derived in order to reach this stability [1][2][3]. For the VIS channel, stable calibrations have been developed using known Earth targets like desert, ocean or convective clouds [4][5][6][7][8][9] or through satellite intercalibrations [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…The SEVIRI Solar Channel Calibration (SSCC) [9] was adopted as the official EUMETSAT calibration for the MVIRI VIS channel (Even though the SSCC method was originally developed for the Spinning Enhanced Visible and Infrared Imager (SEVIRI) onboard the Meteosat Second Generation (MSG) satellites [15], it proved to work well for the MFG instruments too.). This vicarious calibration technique corrects the decrease in signal due to degradation, by allowing the calibration coefficient to increase linearly in time.…”

Section: Introductionmentioning

confidence: 99%

Spectral Aging Model Applied to Meteosat First Generation Visible Band

et al. 2014

View full text Add to dashboard Cite

The Meteosat satellites have been operational since the early eighties, creating so far a continuous time period of observations of more than 30 years. In order to use this data for climate data records, a consistent calibration is necessary between the consecutive instruments. Studies have shown that the Meteosat First Generation (MFG) satellites suffer from in-flight degradation which is spectral of nature and is not corrected by the official calibration of EUMETSAT. Continuing on previous published work by the same authors, this paper applies the spectral aging model to a set of clear-sky and cloudy targets, and derives the model parameters for all six MFG satellites (Meteosat-2 to -7). Several problems have been encountered, both due to the instrument and due to geophysical occurrences, and these are discussed and illustrated here in detail. The paper shows how the spectral aging model is an improvement compared to the EUMETSAT calibration method with a stability of 1%-2% for Meteosat-4 to -7, which increases up to 6% for ocean sites using the full MFG time period.

show abstract

Operational calibration of the Meteosat radiometer VIS band

Cited by 61 publications

References 26 publications

Digging the METEOSAT Treasure—3 Decades of Solar Surface Radiation

Digging the METEOSAT Treasure—3 Decades of Solar Surface Radiation

The CM SAF TOA Radiation Data Record Using MVIRI and SEVIRI

Spectral Aging Model Applied to Meteosat First Generation Visible Band

Contact Info

Product

Resources

About