Real Time and Archived Satellite Imagery
De-clouded AVHRR Sea Surface Temperatures
Eight Day Rolling Averages
The data on this web page have been collected from NOAA-12, 14, 16, 17, and 18
satellites. To see where the active satellites are located in their orbits, click
A few notes on the De-clouded 8-Day Average Sea Surface Temps Image Archive
The images in this database are from the Advanced Very High Resolution Radiometer (AVHRR).
We record approximately 9 AVHRR passes per day with our L-Band satellite dish.
The raw satellite data is processed to sea surface temperature using the Multi-channel Sea Surface Temperature (MCSST) algorithm using SeaSpace Terascan software. For more information on this algorithm check out the primer (pdf file) written by our collegue Dr. Frank Monaldo at Johns Hopkins University.
These Eight Day Rolling Average De-clouded images are averaged over the previous 8 days. This "fills" the image, but has a tendency to smooth the SST features. The range or variability of temperature at each pixel over those 8 days is also plotted to give the user a sense for how dynamic each pixel is over the last 8 days. De-clouding and averaging were conducted by Dr. Matt Oliver of the University of Delaware.
The AVHRR sensor has a spectral resolution of 5 channels in the visible and infrared spectrum. The spatial resolution of the data is 1km. All time stamps are in Greenwich Mean Time (GMT). GMT is 4 hours ahead of Eastern Standard Time from March to November and 5 hours ahead the rest of the year (daylight savings time is not observed in England).