CDF n 1 data iDot Mission topex cycle 048 geod GOCO05s filter J/W-Filter filter_length 69km crossover_analysis MMXO15 MVA_version 31 longitude unit degree =I T latitude unit degree =I =K jday unit day reference_epoch 1.1.2000,12.00 =I zd dot unit m =I pass Rd (t@1\`@11A@1U