Filename conventions

Daily, dekadal and monthly products (S1/S10/S30)

The RS information is named in the following, generic way:

              SPdateV[D].eee

• S = Sensor or Source
  • U: SPOT-VGT
  • A: NOAA-AVHRR
  • O: METOP-AVHRR
  • M: TERRA-MODIS
  • G: MSG-SEVIRI

• P = Periodicity
  • D: Daily values
  • T: 10-daily, dekadal values
  • M: Monthly values

• date = Startdate of the concerned period. Three different formats (depending on P) for:

    -daily files:	yyMdd (exceptional)
    -dekadal files:	yytt
    -monthly files:	yymm
             with:
             -yy:	year (50-99=1950-1999, 00-49=2000-2049). 
                        years 50-63 for HY: 50-60=deciles (55=median), 61=Ngood, 62=µ, 63=σ 
             -M:	month-character (A=January, L=December) 
             -mm:	month_in_year (01-12) 
             -tt:	dekad_in_year (01-36) 
             -dd:       day_in_month (01-31) 

• V = Image Variable (see table below), mostly though not always 1 character.

• D = Difference type (added only for difference images, not for normal images):

         Differences with regard to previous year:	
              *	a:		Absolute difference
              *	r: 		Relative difference
         Differences with regard to historical year	
              *	0:		ADVI	Absolute Difference VI
              *	1:		RDVI	Relative Difference VI
              *	3:		RRVI  	Relative Range VI 	(= VCI when applied on NDVI)
              *	4:		HPVI 	Historical Probability VI	(= VPI when applied on NDVI)

• eee = Filename extension

         IMG/HDR:	ENVI/GLIMPSE-formatted image
         PNG:		QuickLook
         RUM:		RUM-file (ASCII-TXT) 

_{Image Variables V per Sensor S}

Sensor: U=SPOT-VGT, A=NOAA-AVHRR, O=METOP-AVHRR, M=TERRA-MODIS, G=MSG

V=Variable suffix in filenames, BPP=Byte_Per-Pixel, UNI=Uniflag (No/Yes)

Special codes: A/B=for Band 3A/B on AVHRR/3

Annual products (S360): clustering and similarity

The annual products follow a different filename convention, which is outlined below. SyyUdkv.img/hdr/png

An individual annual series comprises 1 to 36 dekads. If the series is complete, a new year is started. The symbol yy indicates the year which at the end comprises most of the dekads in the series. For instance, in early April 2011, when the 9 first dekads of 2011 are available:

• The actual m-series then only comprises 3 dekads (March) and is labelled with yy=11. This label is kept until the series is completed (36 dekads) at the end of February 2012. Then a new one will be started with yy=12.
• The actual o-series comprises 18 dekads (October 2010  March 2011) and is also labelled with yy=11. At the end of September it will be complete (36 dekads) and in October 2011 a new o-series will be started for the next year (yy=12).