Radiation Budget

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R Stuhlmann - One of the best experts on this subject based on the ideXlab platform.

  • Study of aerosol impact on the earth Radiation Budget in support of the Geostationary Earth Radiation Budget (GERB) experiment
    2020
    Co-Authors: K. Dammann, R. Hollmann, R Stuhlmann
    Abstract:

    Preliminary to the launch of the first Meteosat Second Generation (MSG) satellite and within support of the Geostationary Earth Radiation Budget experiment onboard of MSG, algorithms are tested to retrieve aerosol opticalparameters and their possible signature on the Earth Radiation Budget (ERB). For this existing data from instruments on satellites in low earth orbit is used like NOAA/AVHRR and ScaRaB. In particular AVHRR data are used for retrieving aerosol optical parameters which then will be related to ERB measurements from ScaRaB.

  • Study of aerosol impact on the earth Radiation Budget with satellite data
    Advances in Space Research, 2002
    Co-Authors: K. Dammann, R. Hollmann, R Stuhlmann
    Abstract:

    Abstract Preliminary to the launch of the first Meteosat Second Generation satellite and within support of the Geostationary Earth Radiation Budget experiment onboard of MSG, algorithms are tested to detect aerosol optical parameters and their possible signature on the Earth Radiation Budget using existing data from instruments on satellites in low earth orbit like NOAA/AVHRR and ScaRaB.

  • The ScaRaB–Resurs Earth Radiation Budget Dataset and First Results
    Bulletin of the American Meteorological Society, 2001
    Co-Authors: Jean Philippe Duvel, Johannes Mueller, Robert S Kandel, Michel Viollier, P Raberanto, L A Pakhomov, V A Golovko, Martial Haeffelin, R Stuhlmann
    Abstract:

    Measurements made by the second flight model of the Scanner for Radiation Budget (ScaRaB) instrument have been processed and are now available for the scientific community. Although this set of data is relatively short and sparse, it is of excellent quality and is the only global broadband scanner radiance information for the period between October 1998 and April 1999. This second flight model marks the conclusion of the ScaRaB cooperative program of France, Russia, and Germany. The two flight models of the ScaRaB instrument gave broadband radiance measurements comparable in quality to those made by the Earth Radiation Budget Experiment and the Clouds and Earth Radiant Energy System scanning instruments. In addition, the ScaRaB instrument gave unique results for the comparison between narrowband (visible and infrared atmospheric window) and broadband radiance measurements. These measurements were mostly used to improve the broadband data processing and to study the error Budget resulting when narrowband c...

  • Aerosol impact on the earth Radiation Budget with satellite data
    AIP Conference Proceedings, 2001
    Co-Authors: K. Dammann, R. Hollmann, R Stuhlmann
    Abstract:

    Preliminary to the launch of the first Meteosat Second Generation satellite (MSG) and within support of the Geostationary Earth Radiation Budget (GERB) instrument onboard of MSG, algorithms are tested to detect aerosol optical parameters and their possible signature on the Earth Radiation Budget (ERB) using existing data from instruments on satellites in low earth orbit like NOAA/AVHRR and ScaRaB.

  • Aerosol impact on the Earth Radiation Budget in support of the Geostationary Earth Radiation Budget (GERB) experiment
    Optical Remote Sensing of the Atmosphere and Clouds II, 2001
    Co-Authors: K. Dammann, R. Hollmann, R Stuhlmann
    Abstract:

    Preliminary to the launch of the first Meteosat Second Generation (MSG) satellite and within support of the Geostationary Earth Radiation Budget experiment onboard of MSG, algorithms are tested to retrieve aerosol optical parameters and their possible signature on the Earth Radiation Budget (ERB). For this existing data from instruments on satellites in low earth orbit is used like NOAA/AVHRR and ScaRaB. In particular AVHRR data are used for retrieving aerosol optical parameters which then will be related to ERB measurements from ScaRaB.© (2001) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Johannes Mueller - One of the best experts on this subject based on the ideXlab platform.

  • the geostationary earth Radiation Budget project
    Bulletin of the American Meteorological Society, 2005
    Co-Authors: John E. Harries, S. Kellock, R. Wrigley, J E Russell, J A Hanafin, Helen Brindley, J M Futyan, J Rufus, Grant Matthews, Johannes Mueller
    Abstract:

    This paper reports on a new satellite sensor, the Geostationary Earth Radiation Budget (GERB) experiment. GERB is designed to make the first measurements of the Earth's Radiation Budget from geostationary orbit. Measurements at high absolute accuracy of the reflected sunlight from the Earth, and the thermal Radiation emitted by the Earth are made every 15 min, with a spatial resolution at the subsatellite point of 44.6 km (north–south) by 39.3 km (east–west). With knowledge of the incoming solar constant, this gives the primary forcing and response components of the top-of-atmosphere Radiation. The first GERB instrument is an instrument of opportunity on Meteosat-8, a new spin-stabilized spacecraft platform also carrying the Spinning Enhanced Visible and Infrared (SEVIRI) sensor, which is currently positioned over the equator at 3.5°W. This overview of the project includes a description of the instrument design and its preflight and in-flight calibration. An evaluation of the instrument performance after ...

  • The ScaRaB–Resurs Earth Radiation Budget Dataset and First Results
    Bulletin of the American Meteorological Society, 2001
    Co-Authors: Jean Philippe Duvel, Johannes Mueller, Robert S Kandel, Michel Viollier, P Raberanto, L A Pakhomov, V A Golovko, Martial Haeffelin, R Stuhlmann
    Abstract:

    Measurements made by the second flight model of the Scanner for Radiation Budget (ScaRaB) instrument have been processed and are now available for the scientific community. Although this set of data is relatively short and sparse, it is of excellent quality and is the only global broadband scanner radiance information for the period between October 1998 and April 1999. This second flight model marks the conclusion of the ScaRaB cooperative program of France, Russia, and Germany. The two flight models of the ScaRaB instrument gave broadband radiance measurements comparable in quality to those made by the Earth Radiation Budget Experiment and the Clouds and Earth Radiant Energy System scanning instruments. In addition, the ScaRaB instrument gave unique results for the comparison between narrowband (visible and infrared atmospheric window) and broadband radiance measurements. These measurements were mostly used to improve the broadband data processing and to study the error Budget resulting when narrowband c...

  • Earth Radiation Budget data from geostationary orbit
    IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293), 1999
    Co-Authors: Johannes Mueller, Ruzbeh Mossavati, John E. Harries, R Stuhlmann, R. Rhollmann, K. Dammann, R. Wrigley, S. Kellock
    Abstract:

    The Geostationary Earth Radiation Budget (GERB) instrument will be the first instrument dedicated to measure the Earth Radiation Budget (ERB) from geostationary orbit from the year 2000 onward. GERB combines both, spectral broadband measurements and high temporal resolution. The GERB spectral bandpass reaches from 0.32 /spl mu/m beyond 30 /spl mu/m. A quartz filter inserted at every second image limits the bandpass to the region of reflected solar Radiation. Every 15 minutes a complete dataset of both, solar and total spectral bands, is obtained for the whole area visible from geostationary orbit. Special focus was laid on the calibration of the instrument. The accuracy is expected to be 1% in the solar and 0.5% in the thermal spectral domain. Besides of the unique opportunity to study Earth Radiation Budget at a very high temporal resolution, there is high potential for synergy between GERB and other instruments and especially the SEVIRI on MSG.

  • A regional Earth Radiation Budget product for the BALTEX area from ScaRaB
    IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293), 1999
    Co-Authors: R. Hollmann, Johannes Mueller, R Stuhlmann
    Abstract:

    A method has been developed to derive regional Earth Radiation Budget products with high spatial and temporal resolution by synergy of the well calibrated scanner for Radiation Budget (ScaRaB) data with auxiliary data from the operational meteorological satellites. The topic of a narrow-to-broadband conversion from NOAA 11 AVHRR channel 1 to the broadband shortwave channel of ScaRaB will be addressed. This value-added Earth Radiation Budget product is then very usable for the validation of the regional scale model REMO which is in use at GKSS for modelling the energy and water exchange for the BALTEX area. Comparisons of outgoing longwave Radiation at the top of the atmosphere with the REMO model are presented.

  • Aerosol impact on the Earth Radiation Budget-a study in support of the Geostationary Earth Radiation Budget experiment
    IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293), 1999
    Co-Authors: K. Dammann, Johannes Mueller, R. Hollmann, R Stuhlmann
    Abstract:

    Preliminary to the launch of the first Meteosat Second Generation satellite (MSG) and within support of the Geostationary Earth Radiation (GERB) instrument onboard MSG, algorithms are tested to detect aerosol optical parameters and their possible signature on the Earth Radiation Budget (ERB) using existing data from instruments on satellites in low Earth orbit like NOAA/AVHRR and ScaRaB.

Robert S Kandel - One of the best experts on this subject based on the ideXlab platform.

  • Observation of the Earth's Radiation Budget from space
    Comptes Rendus Geoscience, 2010
    Co-Authors: Robert S Kandel, Michel Viollier
    Abstract:

    Abstract The planet's Radiation Budget includes practically all energy exchange between the Sun, the Earth, and space, and so is a fundamental factor of climate. The terms of this Budget, observable only from space, are determined from sampled direct measurements of the solar and terrestrial Radiation fields. On the contrary, however, it should be remembered that energy exchange between the Earth's surface and its atmosphere involves not only radiative but also non-radiative energy fluxes. Nevertheless, only observations from space can provide satisfactory global coverage of the different energy fluxes that determine climate at the Earth's surface, by way of indirect retrievals of radiative fluxes at the surface and at different heights in the atmosphere. We describe the methods, applied to measurements made with a variety of instruments on board different artificial satellites, that have led to our present knowledge of the Earth's Radiation Budget (ERB) at the “top of the atmosphere”: global annual mean values of the ERB terms, its annual cycle, its geographical structure, and its variations. We know that solar irradiance, averaged over the globe and the year, varies by only 0.1% with the solar activity cycle; we also know that planetary (Bond) albedo is close to 0.3, that the global annual mean emission of thermal infrared Radiation to space is close to 240 Wm −2 , and that these terms exhibit a weak but well determined annual cycle. We also know that cloud cover plays a major role in the Radiation Budget, both in the “shortwave” domain (global SW “cloud radiative forcing” –50 Wm −2 ) and in the “longwave” domain (+20 Wm −2 ), thus a net forcing of –30 Wm −2 . Successive satellite missions give consistent results for the shape, the phase, and the amplitude of the annual cycle of the planetary Radiation balance. However, the different estimates of its annual mean absolute value remain uncertain, not differing significantly from zero, although generally excessively positive. We also rapidly review the methods used to determine the surface Radiation Budget as well as that of the atmosphere. For the planetary (TOA) Radiation Budget, we examine to what extent interannual variations and interdecadal trends have been or could be detected. We conclude with a review of projects under way. We also discuss priorities for future efforts, considering in particular, on the one hand ( Ringer, 1997 ), the need to better quantify the factors that govern climate sensitivity to modifications of the atmosphere's radiative properties, on the other hand, the importance of monitoring the evolution of the present disequilibrium situation.

  • The ScaRaB–Resurs Earth Radiation Budget Dataset and First Results
    Bulletin of the American Meteorological Society, 2001
    Co-Authors: Jean Philippe Duvel, Johannes Mueller, Robert S Kandel, Michel Viollier, P Raberanto, L A Pakhomov, V A Golovko, Martial Haeffelin, R Stuhlmann
    Abstract:

    Measurements made by the second flight model of the Scanner for Radiation Budget (ScaRaB) instrument have been processed and are now available for the scientific community. Although this set of data is relatively short and sparse, it is of excellent quality and is the only global broadband scanner radiance information for the period between October 1998 and April 1999. This second flight model marks the conclusion of the ScaRaB cooperative program of France, Russia, and Germany. The two flight models of the ScaRaB instrument gave broadband radiance measurements comparable in quality to those made by the Earth Radiation Budget Experiment and the Clouds and Earth Radiant Energy System scanning instruments. In addition, the ScaRaB instrument gave unique results for the comparison between narrowband (visible and infrared atmospheric window) and broadband radiance measurements. These measurements were mostly used to improve the broadband data processing and to study the error Budget resulting when narrowband c...

  • the scarab earth Radiation Budget dataset
    Bulletin of the American Meteorological Society, 1998
    Co-Authors: Robert S Kandel, Ehrhard Raschke, Johannes Mueller, Michel Viollier, P Raberanto, Ph J Duvel, L A Pakhomov, V A Golovko, Alexander P Trishchenko, R Stuhlmann
    Abstract:

    Abstract Following an overview of the scientific objectives and organization of the French–Russian–German Scanner for Radiation Budget (ScaRaB) project, brief descriptions of the instrument, its ground calibration, and in-flight operating and calibration procedures are given. During the year (24 February 1994–6 March 1995) of ScaRaB Flight Model 1 operation on board Meteor-3/7, radiometer performance was generally good and well understood. Accuracy of the radiances is estimated to be better than 1% in the longwave and 2% in the shortwave domains. Data processing procedures are described and shown to be compatible with those used for the National Aeronautics and Space Administration's (NASA) Earth Radiation Budget Experiment (ERBE) scanner data, even though time sampling properties of the Meteor-3 orbit differ considerably from the ERBE system orbits. The resulting monthly mean earth Radiation Budget distributions exhibit no global bias when compared to ERBE results, but they do reveal interesting strong r...

  • Ground Characterization of the Scanner for Radiation Budget (ScaRaB) Flight Model 1
    Journal of Atmospheric and Oceanic Technology, 1997
    Co-Authors: J. Mueller, Ehrhard Raschke, Robert S Kandel, R Stuhlmann, Renate Becker, Heiko Rinck, P. Burkert, Jean-louis Monge, Francis E. Sirou, Thierry Tremas
    Abstract:

    Abstract The Scanner for Radiation Budget (ScaRaB) is a satellite-based radiometer for measurements of the planetary Radiation Budget. It was launched in January 1994 on a Russian METEOR-3 platform and provided excellent data from February 1994 to March 1995. The radiometer is briefly described. Onboard calibration is performed by tungsten filament lamps and blackbody simulators. The onboard sources were characterized on ground, as well as the spectral response function of the instrument and the linearity of the channels. The ground measurements are described and the results are presented. The error in the blackbody calibration is estimated to 0.4% and to less than 1.5% for the various lamp sources. The lamp sources showed significant drifts during ground testing that could be corrected.

  • The ScaRaB project: earth Radiation Budget observations from the meteor satellites
    Advances in Space Research, 1994
    Co-Authors: Robert S Kandel, Ehrhard Raschke, Michel Viollier, L A Pakhomov, J.-l. Monge, V.i. Adasko, R.g. Reitenbach, R Stuhlmann
    Abstract:

    France, Russia, and Germany are cooperating in the construction and calibration of a Scanning Radiometer for Radiation Balance (ScaRaB), to be flown on the Soviet/Russian Meteor-3 series polar orbiting weather satellites, with launches scheduled annually beginning in summer 1993. The instrument comprises 2 broad channels (total, solar) for Radiation Budget, and 2 narrower bands for scene identification, with spatial resolution 60 km at nadir. We describe the instrument design and calibration procedures. The data processing algorithms follow the general lines adopted in the NASA Earth Radiation Budget Experiment (ERBE) so as to ensure continuity in the long-term series of data. We describe the data products which will be archived and made available to the international scientific community.

R. Hollmann - One of the best experts on this subject based on the ideXlab platform.

  • Study of aerosol impact on the earth Radiation Budget in support of the Geostationary Earth Radiation Budget (GERB) experiment
    2020
    Co-Authors: K. Dammann, R. Hollmann, R Stuhlmann
    Abstract:

    Preliminary to the launch of the first Meteosat Second Generation (MSG) satellite and within support of the Geostationary Earth Radiation Budget experiment onboard of MSG, algorithms are tested to retrieve aerosol opticalparameters and their possible signature on the Earth Radiation Budget (ERB). For this existing data from instruments on satellites in low earth orbit is used like NOAA/AVHRR and ScaRaB. In particular AVHRR data are used for retrieving aerosol optical parameters which then will be related to ERB measurements from ScaRaB.

  • cm saf surface Radiation Budget first results with avhrr data
    Advances in Space Research, 2006
    Co-Authors: R. Hollmann, R W Mueller, A Gratzki
    Abstract:

    Abstract In the phase of redefinition of the EUMETSAT ground segment seven so called Satellite Application Facilities (SAF) each of them serving dedicated user groups have been established in Europe. The SAF on climate monitoring (CM-SAF) will deliver a comprehensive set of climate variables, including from different cloud products, Radiation Budget at the top of the atmosphere, surface Radiation Budget and tropospheric humidity. A consistent dataset of cloud and Radiation products in a high spatial resolution on a uniform grid is derived. The CM-SAF is a joint project of the German Meteorological Service, EUMETSAT and five other European Meteorological Services. It is dedicated to produce climate datasets using data from instruments onboard of METEOSAT Second Generation and polar orbiting satellites NOAA and METOP. After the development phase, the CM-SAF has started its initial operational phase in the end of 2003. In this context, the algorithms have been implemented at the processing centres and the processing of satellite data from the polar orbiting satellites of NOAA has commenced. This paper gives an overview of the first products of surface radiative fluxes and their validation with selected surface sites.

  • Study of aerosol impact on the earth Radiation Budget with satellite data
    Advances in Space Research, 2002
    Co-Authors: K. Dammann, R. Hollmann, R Stuhlmann
    Abstract:

    Abstract Preliminary to the launch of the first Meteosat Second Generation satellite and within support of the Geostationary Earth Radiation Budget experiment onboard of MSG, algorithms are tested to detect aerosol optical parameters and their possible signature on the Earth Radiation Budget using existing data from instruments on satellites in low earth orbit like NOAA/AVHRR and ScaRaB.

  • Aerosol impact on the earth Radiation Budget with satellite data
    AIP Conference Proceedings, 2001
    Co-Authors: K. Dammann, R. Hollmann, R Stuhlmann
    Abstract:

    Preliminary to the launch of the first Meteosat Second Generation satellite (MSG) and within support of the Geostationary Earth Radiation Budget (GERB) instrument onboard of MSG, algorithms are tested to detect aerosol optical parameters and their possible signature on the Earth Radiation Budget (ERB) using existing data from instruments on satellites in low earth orbit like NOAA/AVHRR and ScaRaB.

  • Aerosol impact on the Earth Radiation Budget in support of the Geostationary Earth Radiation Budget (GERB) experiment
    Optical Remote Sensing of the Atmosphere and Clouds II, 2001
    Co-Authors: K. Dammann, R. Hollmann, R Stuhlmann
    Abstract:

    Preliminary to the launch of the first Meteosat Second Generation (MSG) satellite and within support of the Geostationary Earth Radiation Budget experiment onboard of MSG, algorithms are tested to retrieve aerosol optical parameters and their possible signature on the Earth Radiation Budget (ERB). For this existing data from instruments on satellites in low earth orbit is used like NOAA/AVHRR and ScaRaB. In particular AVHRR data are used for retrieving aerosol optical parameters which then will be related to ERB measurements from ScaRaB.© (2001) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Nicolas Clerbaux - One of the best experts on this subject based on the ideXlab platform.

  • measurement of the earth Radiation Budget at the top of the atmosphere a review
    Remote Sensing, 2017
    Co-Authors: Steven Dewitte, Nicolas Clerbaux
    Abstract:

    The Earth Radiation Budget at the top of the atmosphere quantifies how the Earth gains energy from the Sun and loses energy to space. It is of fundamental importance for climate and climate change. In this paper, the current state-of-the-art of the satellite measurements of the Earth Radiation Budget is reviewed. Combining all available measurements, the most likely value of the Total Solar Irradiance at a solar minimum is 1362 W/m 2, the most likely Earth albedo is 29.8%, and the most likely annual mean Outgoing Longwave Radiation is 238 W/m 2. We highlight the link between long-term changes of the Outgoing Longwave Radiation, the strengthening of El Nino in the period 1985–1997 and the strengthening of La Nina in the period 2000–2009.

  • Climate monitoring with Earth Radiation Budget measurements
    2013
    Co-Authors: Steven Dewitte, Nicolas Clerbaux, A. Velazquez, Edward Baudrez, Stijn Nevens, I. Decoster
    Abstract:

    The Earth Radiation Budget (ERB) and its geographical distribution is intimately linked with the earth’s climate and with the general circulation. We analyze 10 years of global Clouds and the Earth’s Radiant Energy System (CERES) measurements from 2000 to 2010 and 8 years of diurnally resolved Geostationary Earth Radiation Budget (GERB) from 2004 to 2011 to illustrate this link and to verify if we can detect climate variability or systematic change. In response to the diurnal wave of solar heating three tropical convection maxima exist over South America, Africa, and around Indonesia. The Indonesian convection maximum is unstable due to a lack of a stabilizing land mass; this is the root cause of the El Niňo/La Niňa inter-annual variation with a global pattern of teleconnected variations through the general Walker circulation. Since 2000 a change in global dynamics seems to have occurred. There was a general strengthening of La Niňa, coinciding with a ‘break in global temperature rise’, and with an ‘easte...

  • the geostationary earth Radiation Budget edition 1 data processing algorithms
    Advances in Space Research, 2008
    Co-Authors: Steven Dewitte, Nicolas Clerbaux, C. Bertrand, L. Gonzalez, B De Paepe
    Abstract:

    Abstract The Geostationary Earth Radiation Budget (GERB) instrument is the first to measure the earth Radiation Budget from a geostationary orbit. This allows a full sampling of the diurnal cycle of Radiation and clouds – which is important for climate studies, as well as detailed process studies, e.g. the lifecycle of clouds or particular aerosol events such as desert storms. GERB data is now for the first time released as Edition 1 data for public scientific use. In this paper we summarise the algorithms used for the Edition 1 GERB data processing and the main validation results. Based on the comparison with the independent CERES instrument, the Edition 1 GERB accuracy is 5% for the reflected solar radiances and 2% for the emitted thermal radiances.

  • First TOA fluxes from the Geostationary Earth Radiation Budget (GERB) instrument
    Remote Sensing, 2004
    Co-Authors: C. Bertrand, Steven Dewitte, Nicolas Clerbaux, Didier Caprion, L. Gonzalez
    Abstract:

    On 29th January 2004 the first Meteosat Second Generation satellite MSG-1, renamed Meteosat-8 (MS-8), commenced routine operations. MS-8 carries the new Spinning Enhanced Visible and Infra Red Imager (SEVIRI) and a Geostationary Earth Radiation Budget (GERB) radiometer. GERB provides valuable short- and long wave broadband measurements of the Earth in order to estimate the top-of-atmosphere Radiation Budget accurately. The unique feature of GERB in comparison with previous measurements of the Earth's Radiation Budget is its very fast temporal sampling (15 minutes) afforded by geostationary orbit. On the other hand, the GERB instrument only accounts for a crude spatial resolution (about 50 km at the sub-satellite point). Taking advantage of the synergy between the data from GERB and SEVIRI, we propose at the Royal Meteorological Institute of Belgium to merge the two data streams to produce near real-time estimates of the Radiation Budget for limited geographical regions at a 3x3 SEVIRI pixel resolution (the SEVIRI resolution is 3 km at satellite sub-point). Such fluxes aim to be used by the climate and numerical weather prediction (NWP) scientific communities through climate studies and validation/evaluation of the performance of NWP models over the region covered by MS-8.

  • CM-SAF high-resolution Radiation Budget products
    Remote Sensing of Clouds and the Atmosphere VII, 2003
    Co-Authors: Bogdan Nicula, Steven Dewitte, Nicolas Clerbaux
    Abstract:

    In this paper the system employed at the Royal Meteorological Institute of Belgium (RMIB) within the Climate Monitoring Satellite Application Facility (CM-SAF) for the production of Top Of the Atmosphere (TOA) Radiation Budget components is described. One of the goals of the CM-SAF is to provide consistent TOA and surface Radiation Budget components and cloud properties at high spatial resolution and on an approximate equal area grid for a region that covers at least Europe and part of the North Atlantic Ocean. The TOA Radiation products will be based on data from polar orbiting satellites for northern latitudes, and on data from MSG (METEOSAT Second Generation) for mid latitudes. The instruments used for the reflected solar and emitted thermal flux estimates will be GERB (Geostationary Earth Radiation Budget) and SEVIRI as the geostationary instruments and CERES (Clouds and the Earth's Radiant Energy System) for the non geostationary instruments. Daily means, monthly means and monthly mean diurnal cycles are to be provided. Until MSG fluxes will become available, fluxes from METEOSAT and CERES are used for development. At the TOA the three radiative flux components of incoming solar Radiation, reflected solar Radiation and emitted thermal Radiation will be given. The daily mean GERB and CERES fluxes will be merged to produce a homogenized TOA flux product. The method used for the merging of the TOA fluxes and together with results using currently available input data are shown. The merging consists in the collocation of the two instruments, detection and the removal of the systematic dependencies of the flux estimates on scene type and viewing angles and regridding on a common grid.