Readme for anonymous ftp data directory:
\\Obsun:\FTP-users\pub\data\irradiance\virgo\SSI-SPM\
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spma_level1_h.dat
                Spectral Solar Irradiance (SSI) from SOHO/VIRGO measured with
                sunphotometers (SPM) for public release.
                HOURLY means of SPMA level 1.

spma_level2_d.dat
                Spectral Solar Irradiance (SSI) from SOHO/VIRGO measured with
                sunphotometers (SPM) for public release.
                DAILY means of SPMA, corrected by comparison with SPMB and then detrended
                by polynomials. Also VIRGO TSI is presented for comparison with the
                same detrending

spm_level1_vg.ps
Spm_level1_5_vg.ps
SPM_level2_vg.ps
Detr_power_vg.ps
                Several plots for the explanation of the evaluation and detrending
                of SPMA level1->level2