6                 number of platforms
sstAVHRR   0.10    1.0        0    2 sst
sstGOES    0.20    1.0        0    2 sst
sstGOOFY   0.10    1.0        0    2 sst
shaJASON   0.10   10.0        0    1 sha
shaGFO     0.20   10.0        0    1 sha
ctdALL     0.10   30.0        0    3 ctd