Heliosat
The
Heliosat method converts images acquired by meteorological geostationary
satellites, such as Meteosat (Europe), GOES (USA) or GMS (Japan),
into data and maps of solar radiation received at ground level.
There
is a wealth of publications on the various versions of the Heliosat method. The original method is described in Cano et al. (1986).
Mines ParisTech produced the method Heliosat-2 in November 2002, partly with the support of the European
Commission (project SoDa,
contract DG "INFSO" IST-1999-12245). Complete
software and documentation are available for Heliosat-2.
The
method Heliosat-4 is being developed by Mines ParisTech together with the German Aerospace Agency DLR.
Mines ParisTech produces the databases HelioClim of solar radiation data by applying such methods.
Example of processing by Heliosat-2
In
the following example, the processed image is dated 1rst August
1992, 11h30. The method Heliosat-2 is applied. Click
on images to enlarge.
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| Raw Meteosat data |
Derived cloud index (clearness index) |
Derived hourly radiation |
Software downloadable for solar radiation, clear-sky model, Meteosat satellite, Heliosat-2 method
The item "Softwares" offers access to downloadable sources in C relating to solar radiation and implementation of the
method Heliosat-2:
- Sun - Earth geometry
- Sun geometry perceived by an observer
- time, daylength, sunset, sunrise
- extraterrestrial radiation
- model ESRA for radiation in clear-sky case
- satellite Meteosat geometry
- conversion of
image co-ordinates into geographical coordinates and vice-versa.
- all libraries for the method Heliosat-2
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