These are the variables included for the ISCCP-C1 Stage C1 tape: Byte # Contents Location information: 1 Latitude index (equal-area) 2 Longitude index (equal-area) 3 Lower longitude index (2.5 deg lat/lon) 4 Upper longitude index (2.5 deg lat/lon) Cloud amount: 5 Total number of pixels 6 Number of cloudy pixels 7 Number of IR-cloudy pixels 8 Number of marginal IR-cloudy pixels 9(d) Number of marginal VIS/IR-cloudy pixels 10(d) Number of IR-only-cloudy pixels Identification, snow/ice and viewing geometry: 11 Day/Night/Land/Water/Coast code 12 Satellite identification 13 Snow/ice cover percent 14(d) Cosine of solar zenith angle (MUO = 0-100) 15 Cosine of satellite zenith angle (MUE = 0-100) 16(d) Relative azimuth angle (PHI = 0 - 180 degrees) Clear sky quality information: 17 Number of pixels with long term statistics 18(d) Number of pixels from cloud contaminated region (VIS) 19 Number of pixels cooler than clear IR 20 Number of pixels warmer than clear IR 21 Number of pixels much warmer than clear IR 22(d) Number of clear IR pixels brighter than clear VIS 23(d) Number of clear IR pixels darker than clear VIS 24(d) Number of clear IR pixels much darker than clear VIS 25 Number of clear pixels showing IR cloud contamination in RAD ANAL PC distribution (UNADJUSTED PC) 26 Number of pixels 5 < PC < 180 mb 27 Number of pixels 180 < PC < 310 mb 28 Number of pixels 310 < PC < 440 mb 29 Number of pixels 440 < PC < 560 mb 30 Number of pixels 560 < PC < 680 mb 31 Number of pixels 680 < PC < 800 mb 32 Number of pixels 800 < PC < 1000 mb PC distribution (VIS-ONLY CLOUDY, UNADJUSTED PC) 33(d) Number of pixels 5 < PC < 180 mb 34(d) Number of pixels 180 < PC < 310 mb 35(d) Number of pixels 310 < PC < 440 mb 36(d) Number of pixels 440 < PC < 560 mb 37(d) Number of pixels 560 < PC < 680 mb 38(d) Number of pixels 680 < PC < 800 mb 39(d) Number of pixels 800 < PC < 1000 mb PC/TAU distribution (ADJUSTED PC) 40(d) Number of pixels 5 < PC < 180 mb 0.02 < TAU < 1.27 41(d) Number of pixels 5 < PC < 180 mb 1.27 < TAU < 3.55 42(d) Number of pixels 5 < PC < 180 mb 3.55 < TAU < 9.38 43(d) Number of pixels 5 < PC < 180 mb 9.38 < TAU < 22.63 44(d) Number of pixels 5 < PC < 180 mb 22.63 < TAU < 119.59 45(d) Number of pixels 180 < PC < 310 mb 0.02 < TAU < 1.27 46(d) Number of pixels 180 < PC < 310 mb 1.27 < TAU < 3.55 47(d) Number of pixels 180 < PC < 310 mb 3.55 < TAU < 9.38 48(d) Number of pixels 180 < PC < 310 mb 9.38 < TAU < 22.63 49(d) Number of pixels 180 < PC < 310 mb 22.63 < TAU < 119.59 50(d) Number of pixels 310 < PC < 440 mb 0.02 < TAU < 1.27 51(d) Number of pixels 310 < PC < 440 mb 1.27 < TAU < 3.55 52(d) Number of pixels 310 < PC < 440 mb 3.55 < TAU < 9.38 53(d) Number of pixels 310 < PC < 440 mb 9.38 < TAU < 22.63 54(d) Number of pixels 310 < PC < 440 mb 22.63 < TAU < 119.59 55(d) Number of pixels 440 < PC < 560 mb 0.02 < TAU < 1.27 56(d) Number of pixels 440 < PC < 560 mb 1.27 < TAU < 3.55 57(d) Number of pixels 440 < PC < 560 mb 3.55 < TAU < 9.38 58(d) Number of pixels 440 < PC < 560 mb 9.38 < TAU < 22.63 59(d) Number of pixels 440 < PC < 560 mb 22.63 < TAU < 119.59 60(d) Number of pixels 560 < PC < 680 mb 0.02 < TAU < 1.27 61(d) Number of pixels 560 < PC < 680 mb 1.27 < TAU < 3.55 62(d) Number of pixels 560 < PC < 680 mb 3.55 < TAU < 9.38 63(d) Number of pixels 560 < PC < 680 mb 9.38 < TAU < 22.63 64(d) Number of pixels 560 < PC < 680 mb 22.63 < TAU < 119.59 65(d) Number of pixels 680 < PC < 800 mb 0.02 < TAU < 1.27 66(d) Number of pixels 680 < PC < 800 mb 1.27 < TAU < 3.55 67(d) Number of pixels 680 < PC < 800 mb 3.55 < TAU < 9.38 68(d) Number of pixels 680 < PC < 800 mb 9.38 < TAU < 22.63 69(d) Number of pixels 680 < PC < 800 mb 22.63 < TAU < 119.59 70(d) Number of pixels 800 < PC < 1000 mb 0.02 < TAU < 1.27 71(d) Number of pixels 800 < PC < 1000 mb 1.27 < TAU < 3.55 72(d) Number of pixels 800 < PC < 1000 mb 3.55 < TAU < 9.38 73(d) Number of pixels 800 < PC < 1000 mb 9.38 < TAU < 22.63 74(d) Number of pixels 800 < PC < 1000 mb 22.63 < TAU < 119.59 Mean cloud properties: 75 Mean PC for IR-cloudy pixels 76 Sigma-PC for IR-cloudy pixels 77 Mean PC for marginal IR-cloudy pixels 78(d) Mean PC for VIS/IR-cloudy pixels 79(d) Mean PC for marginal VIS/IR-cloudy pixels 80 Mean TC for IR-cloudy pixels 81 Sigma-TC for IR-cloudy pixels 82 Mean TC for marginal IR-cloudy pixels 83(d) Mean TC for VIS/IR-cloudy pixels 84(d) Mean TC for marginal VIS/IR-cloudy pixels 85(d) Mean TAU for VIS/IR-cloudy pixels 86(d) Sigma-TAU for VIS/IR-cloudy pixels 87(d) Mean TAU for marginal IR-cloudy pixels 88(d) Mean TAU for marginal VIS/IR-cloudy pixels Mean surface properties: 89 Mean TS from clear sky composite 90 Mean TS for IR-clear pixels 91 Sigma-TS for IR-clear pixels 92(d) Mean TS for VIS/IR-clear pixels 93(d) Mean RS from clear sky composite 94(d) Mean RS for VIS/IR-clear pixels 95(d) Sigma-RS for VIS/IR-clear pixels 96(d) Mean RS for IR-clear pixels Mean radiances: 97 Mean IR for IR-cloudy pixels 98 Sigma-IR for IR-cloudy pixels 99(d) Mean IR for VIS/IR-cloudy pixels 100 Mean IR for IR-clear pixels 101 Sigma-IR for IR-clear pixels 102(d) Mean IR for VIS/IR-clear pixels 103 Mean IR from clear sky composite 104(d) Mean VIS for VIS/IR-cloudy pixels 105(d) Sigma-VIS for VIS/IR-cloudy pixels 106(d) Mean VIS for IR-cloudy pixels 107(d) Mean VIS for VIS/IR-clear pixels 108(d) Sigma-VIS for VIS/IR-clear pixels 109(d) Mean VIS for IR-clear pixels 110(d) Mean VIS from clear sky composite Coincident cloud amount differences: 111 Difference in mean MUE 112 Difference in mean cloud frequency The following variables are available on the ISCCP-C1 tape, but are offered as a separate data set called ISCCP-TOVS through NCDS. Atmospheric properties: 113 Atmospheric origin code 114 PS, surface pressure 115 TS, surface temperature 116 T, temperature 900 mb 117 T, temperature 740 mb 118 T, temperature 620 mb 119 T, temperature 500 mb 120 T, temperature 375 mb 121 T, temperature 245 mb 122 T, temperature 115 mb 123 PT, tropopause pressure 124 TT, tropopause temperature 125 ST, stratosphere temperature at 50 mb 126 ST, stratosphere temperature at 15 mb 127 PW, precipitable water at 900 mb 128 PW, precipitable water at 740 mb 129 PW, precipitable water at 620 mb 130 PW, precipitable water at 500 mb 131 PW, precipitable water at 375 mb 132 O3, ozone abundance * The following applies to ISCCP variables: D: indicates variables present only during local daytime TAU: cloud optical thickness PATH: cloud water path PC: cloud top pressure TC: cloud top temperature TS: surface temperature RS: surface reflectance SIGMA: standard deviation over spatial or time domains GMT 00-21: indicates hour-monthly mean datasets GMT ALL: indicates monthly mean datasets