FAQ
NAT to CAL Conversion
What are NAT files?
NAT is the native archive format of Meteosat Second Generation (MSG), the European weather satellite series operated by EUMETSAT. A file of this type holds one full image of the Earth disk taken by the SEVIRI radiometer, which scans the whole disk every 15 minutes and records it in 12 spectral channels, from visible light to thermal infrared. Eleven of the channels have a ground resolution of about 3 kilometers at the point below the satellite, and the twelfth, a high-resolution visible channel, has 1 kilometer. Such images are the basis of weather forecasting, cloud and fog monitoring, dust and volcanic ash tracking, and climate research. A typical file is named after the satellite and the time of the scan, and it is large, because it holds all the channels together.
What are CAL files?
A CAL image file represents a monochrome bitmap image that uses the CALS raster image standard for storing graphics data. This standard was created in the 1980s by the US Department of Defence as a compressed interchangeable image format. CAL and CALS are extensions used for similar purposes.
Can reaConverter convert NAT to CAL?
Yes! reaConverter instantly converts .nat to .cal with perfect quality preservation. With its batch processing feature, you can convert multiple files at once in just a few clicks. You can even convert images directly from Windows Explorer using the right-click menu — fast and convenient.
What is reaConverter used for?
reaConverter is a Windows converter for 800+ formats, GIS data among them. For NAT to CAL it replaces the usual detour through QGIS, ArcGIS or ogr2ogr: add the files, pick the output format, and the whole batch converts offline. Surveyors, planners and engineering teams use it to pass data between GIS, CAD and everyday document formats.
Why choose offline conversion with reaConverter?
reaConverter is a software program that is used for offline files conversion. Your proprietary documents never leave your computer – essential for architects, engineers, healthcare and government contractors handling classified projects. Meets GDPR, HIPAA, CCPA, and corporate security policies by ensuring files never cross borders or third-party systems.
Can I convert NAT to CAL online?
If you only need to convert a few NAT files to CAL format, feel free to try our free online free online NAT to CAL converter — perfect for small batches with no installation needed!
How can I turn NAT files into CAL on my computer?
The best way to change NATs to CALs on your PC is to install a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from NAT to CAL.
How can I automate NAT to CAL files conversion?
reaConverter supports all the most useful automation features such as right-click сonversion and Watch Folders for the most efficient automated files conversion in any software of this type.
Is there a way to convert NAT files to CAL using the command prompt?
reaConverter provides full access to all its features via Windows command line, including a high-performance command-line nat to cal converter for batch processing.
What else can I do with reaConverter?
Convert DICOM imagesCrop photoConvert GIS filesConvert raster to vectorChange bit depth
Related conversions
Other ways to convert NAT files, and other sources that convert to CAL.
