42 ;number of following comments lines before data start
;A description of the construction of the composite can be found in:
;(1) C.Fr\"ohlich and J. Lean, 1998, "The Suns Total Irradiance: Cycles, 
;  Trends and Related Climate Change Uncertainties since 1978", 
;  Geophys.Res.Let., 25, pp.  4377-4380, 1998 (up to version 8) and in:
;(2) C.Fr\"ohlich, 2000, "Observations of Irradiance Variations, 
;  Space Science Rev., 94, pp. 15-24 (up to version 18)
;(3) C. Fr\"ohlich, 2003, "Long-Term Behaviour of Space Radiometers", 
;  Metrologia, 40, 60--65 (up to version 24), 
;(4) C. Fr\"ohlich, 2006, "Solar Irradiance Variability Since 1978: 
;  Revision of the {PMOD} Composite During Solar Cycle 21", Space Science Rev. in press 
;    2006, preprint available from ftp://ftp.pmodwrc.ch/pub/Claus/ISSI_WS2005/ISSI2005a_CF.pdf
;
;This dataset is freely available with one restriction:
;  If you use the data or some product based on the data in a published 
;  paper refer to Ref2 (the 'standard' description) and Ref5 (for recent updates).
;  Acknowlege receipt of the dataset (mention version used) from PMOD/WRC, Davos, Switzerland,
;  and acknowledge "unpublished data from the VIRGO Experiment on the cooperative 
;  ESA/NASA Mission SoHO"
;
;The composite listed below is version d41_61_0702 in file composite_d41_61_0702.dat
;  available from ftp://ftp.pmodwrc.ch/pub/data/irradiance/composite/
;  This file was created on Feb 15 2007
;
;Comments for version d40 and higher:
;Version 'd40_XX' designates the composite algorithm (corrections for the radiometers 
;  other than VIRGO, as described in Ref 1-4 and XX is derived from the version number of 
;  the VIRGO dataset (6_001_0702) used to update the composite until 06-02-2007.
;  For details see http://www.pmodwrc.ch/pmod.php?topic=tsi/composite/SolarConstant.
;ACRIM II data are used to fill the gap during the SOHO Vacations in 1998 and 
;  early 1999. UARS/ACRIM II is version II:101001 available from 
;  http://acrim.com/Data%20Products.htm.
;Virgo version 6_000 (since Nov 2003) and higher have improved exposure dependent 
;  corrections for PMO6V and as a consequence new non-exposure dependent changes of 
;  DIARAD, these two changes improve the internal consistency of the VIRGO radiometry 
;  substantially. 
;  For details see http://www.pmodwrc.ch/pmod.php?topic=tsi/virgo/proj_space_virgo.
;Description of columns: 
;  1st col: date as YYMMDD
;  2nd col: day of epoch 0 Jan 1980 (1 corresponds to 1-Jan-1980)
;  3rd col: average irradiance in W/m2 (over period of day), no data: -99.
;  format: (1X,I6.6,F9.2,F11.4)
;$ Data: