text: * Surface albedo. The surface reflectivity is of importance for atmospheric photolysis. Instruments such as the [https://web.archive.org/web/20070213005923/http://toms.gsfc.nasa.gov/reflect/reflect.html Total Ozone Mapping Spectrometer] (TOMS) and the [https://web.archive.org/web/20070128230043/http://aura.gsfc.nasa.gov/instruments/omi/index.html Ozone Monitoring Instrument] (OMI) provide daily global fields.