ISCCP-D1 variables.


A complete list of the variables is included here:

The following terms apply to the ISCCP-D1 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

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Box identification
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  1                                                Latitude index (equal-area and equal-angle)
  2                                                Longitude index (equal-area)
  3                                                Westernmost longitude index (equal-angle)
  4                                                Easternmost longitude index (equal-angle)
  5                                                Satellite-ID-code
  6                                                Day/night/land/water/coast code
                                                                 day  night
                                                       water   1    101    (land fraction 0-35 %)
                                                       land     2    102    (land fraction 65-100 %)
                                                       coast   3    103    (land fraction 35-65 %
  7                                                Snow/ice cover (percent)
  8                                                MUE = cosine of satellite zenith angle * 100 (0-100)
  9d                                              MU0 = cosine of solar zenith angle * 100 (0-100)
 10d                                             PHI = relative azimuth angle (0-180 degrees)
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Pixel counters
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 11                                                Total number of pixels
 12                                                Number of cloudy pixels
 13                                                Number of IR-cloudy pixels
 14d                                              Number of IR-only-cloudy pixels
 15                                                Number of NI-cloudy pixels
 16                                                Number of NI-only-cloudy pixels
 17                                                Number of IR-marginally-cloudy pixels
 18d                                              Number of VIS/IR-marginally-cloudy pixels
 19                                                Number of NI-only-marginally-cloudy pixels
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Algorithm statistics
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 20                                                Number of pixels with IR long term statistics
 21                                                Ratio number of IR-clear pixels < clear IR to number > clear IR
 22d                                              Ratio number of VIS/IR-clear pixels > clear VIS to number < clear VIS
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Cloud top pressure (PC) distribution (unadjusted PC)
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 23                                                Number of IR-cloudy pixels  10 <= PC <=  180 mb
 24                                                Number of IR-cloudy pixels 180  < PC <=  310 mb
 25                                                Number of IR-cloudy pixels 310  < PC <=  440 mb
 26                                                Number of IR-cloudy pixels 440  < PC <=  560 mb
 27                                                Number of IR-cloudy pixels 560  < PC <=  680 mb
 28                                                Number of IR-cloudy pixels 680  < PC <=  800 mb
 29                                                Number of IR-cloudy pixels 800  < PC <= 1000 mb
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Cloud top pressure (PC) and optical thickness (TAU) distribution
(VIS-adjusted PC)
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 30d                                               Number of cloudy pixels  10 <= PC <=  180 mb,  0.02 <= TAU <=   1.27
 31d                                               Number of cloudy pixels  10 <= PC <=  180 mb,  1.27  < TAU <=   3.55
 32d                                               Number of cloudy pixels  10 <= PC <=  180 mb,  3.55  < TAU <=   9.38
 33d                                               Number of cloudy pixels  10 <= PC <=  180 mb,  9.38  < TAU <=  22.63
 34d                                               Number of cloudy pixels  10 <= PC <=  180 mb, 22.63  < TAU <=  60.36
 35d                                               Number of cloudy pixels  10 <= PC <=  180 mb, 60.36  < TAU <= 378.65
 36d                                               Number of cloudy pixels 180  < PC <=  310 mb,  0.02 <= TAU <=   1.27
 37d                                               Number of cloudy pixels 180  < PC <=  310 mb,  1.27  < TAU <=   3.55
 38d                                               Number of cloudy pixels 180  < PC <=  310 mb,  3.55  < TAU <=   9.38
 39d                                               Number of cloudy pixels 180  < PC <=  310 mb,  9.38  < TAU <=  22.63
 40d                                               Number of cloudy pixels 180  < PC <=  310 mb, 22.63  < TAU <=  60.36
 41d                                               Number of cloudy pixels 180  < PC <=  310 mb, 60.36  < TAU <= 378.65
 42d                                               Number of cloudy pixels 310  < PC <=  440 mb,  0.02 <= TAU <=   1.27
 43d                                               Number of cloudy pixels 310  < PC <=  440 mb,  1.27  < TAU <=   3.55
 44d                                               Number of cloudy pixels 310  < PC <=  440 mb,  3.55  < TAU <=   9.38
 45d                                               Number of cloudy pixels 310  < PC <=  440 mb,  9.38  < TAU <=  22.63
 46d                                               Number of cloudy pixels 310  < PC <=  440 mb, 22.63  < TAU <=  60.36
 47d                                               Number of cloudy pixels 310  < PC <=  440 mb, 60.36  < TAU <= 378.65
 48d                                               Number of cloudy pixels 440  < PC <=  560 mb,  0.02 <= TAU <=   1.27
 49d                                               Number of cloudy pixels 440  < PC <=  560 mb,  1.27  < TAU <=   3.55
 50d                                               Number of cloudy pixels 440  < PC <=  560 mb,  3.55  < TAU <=   9.38
 51d                                               Number of cloudy pixels 440  < PC <=  560 mb,  9.38  < TAU <=  22.63
 52d                                               Number of cloudy pixels 440  < PC <=  560 mb, 22.63  < TAU <=  60.36
 53d                                               Number of cloudy pixels 440  < PC <=  560 mb, 60.36  < TAU <= 378.65
 54d                                               Number of cloudy pixels 560  < PC <=  680 mb,  0.02 <= TAU <=   1.27
 55d                                               Number of cloudy pixels 560  < PC <=  680 mb,  1.27  < TAU <=   3.55
 56d                                               Number of cloudy pixels 560  < PC <=  680 mb,  3.55  < TAU <=   9.38
 57d                                               Number of cloudy pixels 560  < PC <=  680 mb,  9.38  < TAU <=  22.63
 58d                                               Number of cloudy pixels 560  < PC <=  680 mb, 22.63  < TAU <=  60.36
 59d                                               Number of cloudy pixels 560  < PC <=  680 mb, 60.36  < TAU <= 378.65
 60d                                               Number of cloudy pixels 680  < PC <=  800 mb,  0.02 <= TAU <=   1.27
 61d                                               Number of cloudy pixels 680  < PC <=  800 mb,  1.27  < TAU <=   3.55
 62d                                               Number of cloudy pixels 680  < PC <=  800 mb,  3.55  < TAU <=   9.38
 63d                                               Number of cloudy pixels 680  < PC <=  800 mb,  9.38  < TAU <=  22.63
 64d                                               Number of cloudy pixels 680  < PC <=  800 mb, 22.63  < TAU <=  60.36
 65d                                               Number of cloudy pixels 680  < PC <=  800 mb, 60.36  < TAU <= 378.65
 66d                                               Number of cloudy pixels 800  < PC <= 1000 mb,  0.02 <= TAU <=   1.27
 67d                                               Number of cloudy pixels 800  < PC <= 1000 mb,  1.27  < TAU <=   3.55
 68d                                               Number of cloudy pixels 800  < PC <= 1000 mb,  3.55  < TAU <=   9.38
 69d                                               Number of cloudy pixels 800  < PC <= 1000 mb,  9.38  < TAU <=  22.63
 70d                                               Number of cloudy pixels 800  < PC <= 1000 mb, 22.63  < TAU <=  60.36
 71d                                               Number of cloudy pixels 800  < PC <= 1000 mb, 60.36  < TAU <= 378.65
 72d                                               Number of cloudy pixels for cloud type  4 = Cumulus, ice
 73d                                               Number of cloudy pixels for cloud type  5 = Stratocumulus, ice
 74d                                               Number of cloudy pixels for cloud type  6 = Stratus, ice
 75d                                               Number of cloudy pixels for cloud type 10 = Altocumulus, ice
 76d                                               Number of cloudy pixels for cloud type 11 = Altostratus, ice
 77d                                               Number of cloudy pixels for cloud type 12 = Nimbostratus, ice
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Cloud top pressures (PC)
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 78                                                 Mean PC for cloudy pixels (VIS-adjusted day, unadjusted night)
 79                                                 Mean PC for IR-cloudy pixels (unadjusted)
 80d                                               Mean PC for IR-only-cloudy pixels (VIS-adjusted)
 81                                                 Mean PC for NI-only-cloudy pixels (unadjusted)
 82                                                 Mean PC for IR-marginally-cloudy pixels (unadjusted)
 83d                                               Mean PC for VIS/IR-marginally-cloudy pixels (VIS-adjusted)
 84                                                 Sigma-PC for IR-cloudy pixels (unadjusted)
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Cloud top temperatures (TC)
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 85                                                 Mean TC for cloudy pixels (VIS-adjusted day, unadjusted night)
 86                                                 Mean TC for IR-cloudy pixels (unadjusted)
 87d                                               Mean TC for IR-only-cloudy pixels (VIS-adjusted)
 88                                                 Mean TC for NI-only-cloudy pixels (unadjusted)
 89                                                 Mean TC for IR-marginally-cloudy pixels (unadjusted)
 90d                                               Mean TC for VIS/IR-marginally-cloudy pixels (VIS-adjusted)
 91                                                 Sigma-TC for IR-cloudy pixels (unadjusted)
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Cloud optical thicknesses (TAU)
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 92d                                               Mean TAU for cloudy pixels
 93d                                               Mean TAU for IR-cloudy pixels
 94d                                               Mean TAU for IR-only-cloudy pixels
 95d                                               Mean TAU for NI-only-cloudy pixels
 96d                                               Mean TAU for IR-marginally-cloudy pixels
 97d                                               Mean TAU for VIS/IR-marginally-cloudy pixels
 98d                                               Sigma-TAU for IR-cloudy pixels
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Cloud water paths (WP)
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 99d                                               Mean WP for cloudy pixels
100d                                              Mean WP for IR-cloudy pixels
101d                                              Mean WP for IR-only-cloudy pixels
102d                                              Mean WP for NI-only-cloudy pixels
103d                                              Mean WP for IR-marginally-cloudy pixels
104d                                              Mean WP for VIS/IR-marginally-cloudy pixels
105d                                              Sigma-WP for IR-cloudy pixels
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Cloud top temperature (TC) distribution (unadjusted PC,TC)
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106                                                Mean TC for IR-cloudy pixels  10 <= PC <=  180 mb
107                                                Mean TC for IR-cloudy pixels 180  < PC <=  310 mb
108                                                Mean TC for IR-cloudy pixels 310  < PC <=  440 mb
109                                                Mean TC for IR-cloudy pixels 440  < PC <=  560 mb
110                                                Mean TC for IR-cloudy pixels 560  < PC <=  680 mb
111                                                Mean TC for IR-cloudy pixels 680  < PC <=  800 mb
112                                                Mean TC for IR-cloudy pixels 800  < PC <= 1000 mb
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Temperature, optical thickness, water path means for LOW cloud types
(VIS-adjusted TC)
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113d                                               Mean TC for cloud type 1 = Cumulus,liquid
114d                                               Mean TAU for cloud type 1
115d                                               Mean WP for cloud type 1
116d                                               Mean TC for cloud type 2 = Stratocumulus,liquid
117d                                               Mean TAU for cloud type 2
118d                                               Mean WP for cloud type 2
119d                                               Mean TC for cloud type 3 = Stratus,liquid
120d                                               Mean TAU for cloud type 3
121d                                               Mean WP for cloud type 3
122d                                               Mean TC for cloud type 4 = Cumulus,ice
123d                                               Mean TAU for cloud type 4
124d                                               Mean WP for cloud type 4
125d                                               Mean TC for cloud type 5 = Stratocumulus,ice
126d                                               Mean TAU for cloud type 5
127d                                               Mean WP for cloud type 5
128d                                               Mean TC for cloud type 6 = Stratus,ice
129d                                               Mean TAU for cloud type 6
130d                                               Mean WP for cloud type 6
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Temperature, Optical thickness, Water path means for MIDDLE cloud types
(VIS-adjusted TC)
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131d                                               Mean TC for cloud type 7 = Altocumulus,liquid
132d                                               Mean TAU for cloud type 7
133d                                               Mean WP for cloud type 7
134d                                               Mean TC for cloud type 8 = Altostratus,liquid
135d                                               Mean TAU for cloud type 8
136d                                               Mean WP for cloud type 8
137d                                               Mean TC for cloud type 9 = Nimbostratus,liquid
138d                                               Mean TAU for cloud type 9
139d                                               Mean WP for cloud type 9
140d                                               Mean TC for cloud type 10 = Altocumulus,ice
141d                                               Mean TAU for cloud type 10
142d                                               Mean WP for cloud type 10
143d                                               Mean TC for cloud type 11 = Altostratus,ice
144d                                               Mean TAU for cloud type 11
145d                                               Mean WP for cloud type 11
146d                                               Mean TC for cloud type 12 = Nimbostratus,ice
147d                                               Mean TAU for cloud type 12
148d                                               Mean WP for cloud type 12
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Temperature, Optical thickness, Water path means for HIGH cloud types
(VIS-adjusted TC)
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149d                                               Mean TC for cloud type 13 = Cirrus
150d                                               Mean TAU for cloud type 13
151d                                               Mean WP for cloud type 13
152d                                               Mean TC for cloud type 14 = Cirrostratus
153d                                               Mean TAU for cloud type 14
154d                                               Mean WP for cloud type 14
155d                                               Mean TC for cloud type 15 = Deep convective
156d                                               Mean TAU for cloud type 15
157d                                               Mean WP for cloud type 15
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Surface temperatures (TS)
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158                                                 Mean TS from clear sky composite
159                                                 Mean TS for clear pixels
160                                                 Mean TS for IR-clear pixels
161d                                               Mean TS for VIS/IR-clear pixels
162                                                 Sigma-TS for IR-clear pixels
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Surface reflectances (RS)
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163d                                               Mean RS from clear sky composite
164d                                               Mean RS for clear pixels
165d                                               Mean RS for IR-clear pixels
166d                                               Mean RS for VIS/IR-clear pixels
167d                                               Sigma-RS for IR-clear pixels
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Near-IR channel reflectance
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168d                                               Mean NI reflectance from clear sky composite
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IR channel radiances
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169                                                Mean IR radiance for IR-cloudy pixels
170                                                Sigma-IR radiance for IR-cloudy pixels
171d                                              Mean IR radiance for VIS/IR-cloudy pixels
172                                                Mean IR radiance for IR-clear pixels
173                                                Sigma-IR radiance for IR-clear pixels
174d                                              Mean IR radiance for VIS/IR-clear pixels
175                                                Mean IR radiance from clear sky composite
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VIS channel radiances
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176d                                               Mean VIS radiance for VIS/IR-cloudy pixels
177d                                               Sigma-VIS radiance for VIS/IR-cloudy pixels
178d                                               Mean VIS radiance for IR-cloudy pixels
179d                                               Mean VIS radiance for VIS/IR-clear pixels
180d                                               Sigma-VIS radiance for VIS/IR-clear pixels
181d                                               Mean VIS radiance for IR-clear pixels
182d                                               Mean VIS radiance from clear sky composite
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TOVS atmospheric information
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183                                                Atmospheric data origin code
184                                                Surface pressure
185                                                Near-surface air temperature
186                                                Temperature at 900 mb
187                                                Temperature at 740 mb
188                                                Temperature at 620 mb
189                                                Temperature at 500 mb
190                                                Temperature at 375 mb
191                                                Temperature at 245 mb
192                                                Temperature at 115 mb
193                                                Tropopause pressure
194                                                Tropopause temperature
195                                                Stratosphere temperature at 50 mb
196                                                Stratosphere temperature at 15 mb
197                                                Precipitable water for 1000-800 mb
198                                                Precipitable water for 800-680 mb
199                                                Precipitable water for 680-560 mb
200                                                Precipitable water for 560-440 mb
201                                                Precipitable water for 440-310 mb
202                                                Ozone abundance