Historical remote sensing phenology (RSP) image data and graphics for the conterminous U.S. (CONUS) are made freely available from the USGS EROS Center through this website. Seven data sets are distributed, and they are listed on the upper left side of this page. Due to degradation of the MODIS Terra and Aqua sensors and the expected decommissioning of the MODIS sensors in the near future, eMODIS-based CONUS RSP products will no longer be developed. Starting with 2021 CONUS RSP products, eVIIRS-based RSP data (derived from S-NPP eVIIRS NDVI data) will be developed and available from this website.
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.
Users can also access these data through
Earth Explorer (EE). Note: the MODIS collection number (C5 or C6) can be identified at the end of the EE Entity ID as V01 for C5 and V02 for C6.
Users of these phenology data sets should cite this DOI:
https://doi.org/10.5066/F7PC30G1.
CONUS 1 km AVHRR RSP Data Set
Acronym
Phenological Interpretation
Description
Layer File
Start of Season - Time
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
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
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
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
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
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
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
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
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
MAXT
Time of maximum photosynthesis in the canopy
Day of year corresponding to the maximum NDVI in an annual time series
Maximum NDVI
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
MAXN
Maximum level of photosynthetic activity in the canopy
Maximum NDVI in an annual time series
Duration
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
DUR
Length of photosynthetic activity (the growing season)
Number of days from the SOST to the EOST
Amplitude
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
AMP
Maximum increase in canopy photosynthetic activity above the baseline
Difference between MAXN and SOSN
Time Integrated NDVI
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
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