Investigaciones y Recursos Solares Avanzados

IrSOLaV Database

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rSOLaV has a database of satellite images of excellent quality and updated by a receiving station. The new images received are filtered before its storage in a fully automatic process. The data warehouse of IrSOLaV is composed of the following satellite images which covers different regions of the planet:

MFG: The Meteosat First Generation (MFG) are a set of satellites which provides the Indian Ocean Data Coverage (IODC) service covering the region shown in the centered image further down. These set of satellites were previously located over the position 0º of latitude covering Europe, Africa, Arabian Peninsula and some parts of Brazil (see figure further down on the right). The current near real-time data are rectified to 57.50 E and it provides imagery data 24 hours a day from the three spectral channels of the main instrument, the Meteosat Visible and InfraRed Imager (MVIRI), every 30 minutes. The three channels are in the visible, infrared, and water vapor regions of the electromagnetic spectrum. The IrSOLaV-CIEMATdatabase stores MFG images for IODC from 1999 to the present and also for the latitude 0 degrees (previous position) for the period from 1994 to 2005.

MSG: The Meteosat Second Generation satellite is a significantly enhanced system to the previous version of Meteosat (MFG). MSG consists of a series of four geostationary meteorological satellites that operate consecutively. The MSG system provides accurate weather monitoring data through its primary instrument the Spinning Enhanced Visible and InfraRed Imager (SEVIRI), which has the capacity to observe the Earth in 12 spectral channels. The temporal resolution of the satellite is 15 minutes and the spatial resolution is 1km at Nadir Position (over latitude 0 and longitude 0).


The radiometric and geometric non-linearity errors of the imagery data are corrected to solve any mistakes in the acquisition from the sensor. The data are accompanied with the appropriate ancillary information that allows the user to calculate the geographical position and radiance of any pixel. The IrSOLaV-CIEMAT database stores MSG images from 2006 to the current period (latitude 0 deg).

GOES (The Geostationary Operational Environmental Satellite): The United States of America operates two meteorological satellites in geostationary orbit over the equator. Each satellite views almost a third of the Earth's surface: one monitors North and South America and most of the Atlantic Ocean, the other North America and the Pacific Ocean basin. GOES-12 (or GOES-East) is positioned at 75º W longitude on the equator, while GOES-11 (or GOES-West) is positioned at 135º W longitude on the equator. Both operate together to produce a full-face picture of the Earth, day and night. Coverage extends approximately from 20º W longitude to 165º E longitude. The GOES satellites are able to observe the Earth disk with five spectral channels. The IrSOLaV-CIEMAT database contain GOES images from 2000 to the present.

MTSAT (Multi-functional Transport Satellite): The MTSAT series fulfills a meteorological function for the Japan Meteorological Agency and an aviation control function for the Civil Aviation Bureau (CAB) of the Ministry of Land, Infrastructure and Transport (MLIT). The MTSAT series succeeds the Geostationary Meteorological Satellite (GMS) series as the next generation of satellites covering East Asia and the Western Pacific.

MTSAT provides information to more than 30 countries and territories in the region, including 1) imagery for monitoring the distribution/motion of clouds, 2) sea surface temperatures and 3) distribution of water vapor. The MTSAT series provides imagery for the Northern Hemisphere every 30 minutes in contrast to the previous hourly rate, enabling JMA to more closely monitor typhoon and cloud movement.

MODIS: The Moderate Resolution Imaging Spectroradiometer is a key instrument aboard of the Terra (EOS AM) and Aqua (EOS PM) satellites. The orbit of Terra around the Earth is timed so that it passes from North to South across the equator in the morning, while Aqua passes from South to North over the equator in the afternoon. Terra and Aqua view the entire Earth's surface with a frequency from 1 to 2 days, acquiring data in 36 spectral bands, or groups of wavelengths (see MODIS Technical Specifications on NASA web). These data improve our understanding of global dynamics and processes occurring on the ground, oceans, and lower atmosphere. MODIS is playing a vital role in the development of validated, global, interactive Earth system models able to predict global change accurately enough to assist policy makers in making sound decisions concerning the protection of our environment.

The effect of the atmospheric turbidity on solar radiation is applied in IrSOLaV-CIEMAT model by using the daily values of Linke Turbidity factor from MODIS Terra and Aqua satellites and daily values of AOD (Aerosol Optical Depth) at 550 nm and of water vapour column.



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Last update: 06/01/2016


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