BOREAS RSS-10 TOMS Circumpolar One-Degree PAR Images Satellite estimates of surface-incident photosynthetically active radiation at 1 degree spatial resolution. Latitudes 41 to 66 degrees N latitude. Temporal coverage from May through September for years 1979 through 1989. Derived from Nimbus-7 Total Ozone Mapping Spectrometer (TOMS). 163 binary data sets, 1 parameter per dataset, 19 parameters in all. Each file has 25 rows, 360 columns. PAR files are 2-byte unsigned integers in IEEE byte order. Other 7 file types (snow/ice masks, vegetation masks, and ocean masks) are 1-byte unsigned integers. The two-byte data were scaled from floating point data and must be restored using equations in GUIDE documentation. The GUIDE documentation also identifies the variable and time frame corresponding to each file number. Sample PAR and "sm1m" files were loaded as single band Imagine files and converted to jpeg using 2 standard deviations stretching and 75% quality. Other variables do not generate useful JPEG images and are not included.