Remote Sensing Phenology

Acquiring Remote Sensing Phenology Data from USGS/EROS

Historical remote sensing phenology (RSP) image data and graphics for the conterminous U.S. are made freely available from the USGS/EROS Center through this table. Click on the drop down list to the right of the icon for image data (top) or graphics (bottom) and select the year for the RSP data set or graphic. Metadata, providing processing details, are bundled with the image data.

RSP Data Set	Acronym	Phenological Interpretation	Description
Start of Season – Time	SOST	Beginning of measurable photosynthesis in the vegetation canopy	Day of year identified as having a consistent upward trend in time series NDVI
Start of Season –NDVI	SOSN	Level of photosynthetic activity at the beginning of measurable photosynthesis	NDVI value (or baseline) identified at the day of year identified as a consistent upward trend in time series NDVI
End of Season –Time	EOST	End of measurable photosynthesis in the vegetation canopy	Day of year identified at the end of a consistent downward trend in time series NDVI
End of Season –NDVI	EOSN	Level of photosynthetic activity at the end of measurable photosynthesis	NDVI value corresponding with the day of year identified at the end of a consistent downward trend in time series NDVI
Time of Maximum	MAXT	Time of maximum photosynthesis in the canopy	Day of year corresponding to the maximum NDVI in an annual time series
Maximum NDVI	MAXN	Maximum level of photosynthetic activity in the canopy	Maximum NDVI in an annual time series
Duration	DUR	Length of photosynthetic activity (the growing season)	Number of days from the SOST to the EOST
Amplitude	AMP	Maximum increase in canopy photosynthetic activity above the baseline	Difference between MAXN and SOSN
Time Integrated NDVI	TIN	Canopy photosynthetic activity across the entire growing season	Daily (interpolated) integration of NDVI above the baseline for the entire duration of the growing season