Satellites (indirect measures)
To measure the UV radiation, different types of satellites are used:
TOTAL OZONE MAPPING SPECTROMETER (TOMS)
This is an orbiting satellite which measures total ozone, cloudiness and solar radiation reflected by the upper atmosphere.
- Can scan the entire surface of the earth.
- TOMS satellite cannot provide an estimate of the UV radiation reaching the earth’s surface,
- Low resolution.
For more information on this satellite, visit science.nasa.gov
This is a geostationary satellite. It measures the total solar irradiance received by the earth’s surface by reflection; this irradiance can later be modelled with additional data sources to extract UV radiation.
- Takes cloud into account,
- Distinguishes the different wavelengths,
- Takes measurements every 20 minutes, with a resolution of approximately 10km,
- Real-time measurements possible.
- A primarily ecological approach,
- Measurement affected by soil type and altitude corrections.
For more information on this satellite, visit www.soda-is.com