The COLOURS database
Long-term RS-monitoring project, since August 2001, for automated determination of suspended matter (TSM) and chlorophyll (Chl-a) in the Wadden Sea, including automatic determination of favourable measurement circumstances and automatic selection of the water leaving radiance spectrum with the least sun glint contamination for the calculation of RRS.
The Wadden Sea jetty in front of the institute is equipped with 3 optical hyper-spectral sensors. By using 2 down-looking sensors for the detection of the water-leaving radiance, under azimuth angles of 135° and 225° (SE and SW), the sun glint problem can be minimized. At the same time incoming solar radiation measurements are used to determine the weather condition.
Since August 2001 these optical devices provide continuous data every 15 minutes (available for download) under all kinds of weather conditions. The hereby collected optical measurements at sea level can be used for either satellite validation exercises (under clear skies) or provide us with on “the spot” water quality parameters also under variable weather conditions.
These web pages present the raw measured and calculated data of the Jetty monitoring project. The data is updated once per hour during daylight conditions. The data can be downloaded, but you need to register by e-mail to .
The Royal Netherlands Meteorological Institute (KNMI) also publishes daily global radiation data here
You can also have a look at the Jetty location and current data of the sensors with 
.
NOTE: all downloads will be logged for your IP (38.107.179.230).
