Introduction
| CLOT_W, CLER_W |
Define |
Optical thickness and effective radius of water cloud droplets |
| Unit |
none for thickness, mm for radius |
| ATBD |
Ver.1 (Sep. 2011)
|
| CLOT_I, CLER_I |
Define |
Optical thickness and effective radius of ice cloud droplets |
| Unit |
none for thickness, mm for radius |
| ATBD |
Ver.1 (Sep. 2011)
|
| CLTT, CLTH |
Define |
Temperature and height of cloud top layer. |
| Unit |
Kelvin for temperature, km for height |
| ATBD |
Ver.1 (Sep. 2011)
|
| CLTYPE |
Define |
Cloud discrimination flag including the classification of cloud type and phase (liquid/solid). |
| Unit |
none |
| ATBD |
Ver.1 (Sep. 2011)
|
Stored Physical quantity
| Ver1,2 |
Description |
| CLER_I |
Ice Cloud Effective Radius |
| CLER_W |
Liquid Water Cloud Effective Radius |
| CLOT_I |
Ice Cloud Optical Thickness |
| CLOT_W |
Liquid Water Cloud Optical Thickness |
| CLTH |
Cloud Top Height of Both Liquid Water and Ice Clouds |
| CLTT |
Cloud Top Temperature of Both Liquid Water and Ice Clouds |
| CLTYPE |
Cloud Type under ISCCP Cloud Type Classification Definition |
| QA_flag |
|
QA_flag information
Ver.1,2
Ver.1,2(Sample Image)
| Bit |
ver1,2 |
Description |
CLER_I, W_L3_mask* |
CLOT_I, W_L3_mask* |
CLTH, CLTT_L3_mask* |
CLTYPE_L3_mask* |
| 0 |
Data Availability |
0=Available, 1=Not Available |
0 |
0 |
0 |
0 |
| 1 |
Land / Water Flag |
0=Water, 1=Land |
0 |
0 |
0 |
0 |
| 2 |
Day / Night Flag |
0=Day, 1=Night |
0 |
0 |
0 |
0 |
| 3 |
Cloud Phase Flag |
000=No Measurement
001=No Cloud Flag
010=Clear
011=Undetermined Phase Cloud
100=Liquied Water Cloud
101=Ice Cloud
110=Mixed Phase Cloud
111=TBD |
0 |
0 |
0 |
0 |
| 4 |
0 |
0 |
0 |
0 |
| 5 |
0 |
0 |
0 |
0 |
| 6 |
Cloud Optical Thickness Confidence Flag |
00=Very Good
01=Good
10=Marginal
11=No Condidence or Fill |
0 |
0 |
0 |
0 |
| 7 |
0 |
1 |
0 |
0 |
| 8 |
Cloud Effective Radius Confidence Flag |
00=Very Good
01=Good
10=Marginal
11=No Condidence or Fill |
0 |
0 |
0 |
0 |
| 9 |
1 |
0 |
0 |
0 |
| 10 |
Cloud Top Temperature Confidence Flag |
00=Very Good
01=Good
10=Marginal
11=No Condidence or Fill |
0 |
0 |
0 |
0 |
| 11 |
0 |
0 |
1 |
0 |
| 12 |
Subpixel Inhomogeneity Flag |
0=No, 1=Yes |
0 |
0 |
0 |
0 |
| 13 |
Saturated Radiance Flag |
0=No, 1=Yes |
0 |
0 |
0 |
0 |
| 14 |
Sunglint Flag |
0=No, 1=Yes |
0 |
0 |
0 |
0 |
| 15 |
Spare |
0=TBD, 1=TBD |
- |
- |
- |
- |
* Bits masked by statistical processing are indicated by 1.
Attribute information
| Ver1,2 |
Attribute |
Remarks |
| Attribute of Image_data |
| Attribute of Image_data |
Grid_interval |
0.00833333 |
1km: 0.00833333 |
| Grid_interval_unit |
deg |
|
| Image_projection |
EQA (sinusoidal equal area) projection from 0-deg longitude |
|
| Lower_left_latitude |
40 |
Variable |
| Lower_left_longitude |
130.541 |
| Lower_right_latitude |
40 |
| Lower_right_longitude |
143.595 |
| Number_of_lines |
1200 |
1km: 1200 |
| Number_of_pixels |
1200 |
| Upper_left_latitude |
50 |
Variable |
| Upper_left_longitude |
155.572 |
| Upper_right_latitude |
50 |
| Upper_right_longitude |
171.13 |
| CLER_I |
| CLER_I |
Data_description |
Ice Cloud Effective Radius | VAL=DN*Slope+Offset |
|
| Error_DN |
65535 |
|
| Maximum_valid_DN |
15000 |
Variable |
| Minimum_valid_DN |
0 |
Variable |
| Offset |
0 |
Variable |
| Spatial_resolution |
0.00833333 |
1km: 0.00833333 |
| Spatial_resolution_unit |
degree |
|
| Slope |
0.01 |
Variable |
| Unit |
micro meter |
|
| Mask_for_statistics |
512 |
Detail：QA_flag information（～L3_mask） |
| CLER_W |
| CLER_W |
Data_description |
Liquid Water Cloud Effective Radius | VAL=DN*Slope+Offset |
|
| Error_DN |
65535 |
|
| Maximum_valid_DN |
6200 |
Variable |
| Minimum_valid_DN |
0 |
Variable |
| Offset |
0 |
Variable |
| Spatial_resolution |
0.00833333 |
1km: 0.00833333 |
| Spatial_resolution_unit |
degree |
|
| Slope |
0.01 |
Variable |
| Unit |
micro meter |
|
| Mask_for_statistics |
512 |
Detail：QA_flag information（～L3_mask） |
| CLOT_I |
| CLOT_I |
Data_description |
Ice Cloud Optical Thickness | VAL=DN*Slope+Offset |
|
| Error_DN |
65535 |
|
| Maximum_valid_DN |
15000 |
Variable |
| Minimum_valid_DN |
0 |
Variable |
| Offset |
0 |
Variable |
| Spatial_resolution |
0.00833333 |
1km: 0.00833333 |
| Spatial_resolution_unit |
degree |
|
| Slope |
0.01 |
Variable |
| Unit |
Dimensionless |
|
| Mask_for_statistics |
128 |
Detail：QA_flag information（～L3_mask） |
| CLOT_W |
| CLOT_W |
Data_description |
Liquid Water Cloud Optical Thickness | VAL=DN*Slope+Offset |
|
| Error_DN |
65535 |
|
| Maximum_valid_DN |
10000 |
Variable |
| Minimum_valid_DN |
0 |
Variable |
| Offset |
0 |
Variable |
| Spatial_resolution |
0.00833333 |
1km: 0.00833333 |
| Spatial_resolution_unit |
degree |
|
| Slope |
0.01 |
Variable |
| Unit |
Dimensionless |
|
| Mask_for_statistics |
128 |
Detail：QA_flag information（～L3_mask） |
| CLTH |
| CLTH |
Data_description |
Cloud Top Height of Both Liquid Water and Ice Clouds | VAL=DN*Slope+Offset |
|
| Error_DN |
65535 |
|
| Maximum_valid_DN |
20000 |
Variable |
| Minimum_valid_DN |
0 |
Variable |
| Offset |
0 |
Variable |
| Spatial_resolution |
0.00833333 |
1km: 0.00833333 |
| Spatial_resolution_unit |
degree |
|
| Slope |
0.001 |
Variable |
| Unit |
km |
|
| Mask_for_statistics |
2048 |
Detail：QA_flag information（～L3_mask） |
| CLTT |
| CLTT |
Data_description |
Cloud Top Temperature of Both Liquid Water and Ice Clouds | VAL=DN*Slope+Offset |
|
| Error_DN |
65535 |
|
| Maximum_valid_DN |
20000 |
Variable |
| Minimum_valid_DN |
0 |
Variable |
| Offset |
150 |
Variable |
| Spatial_resolution |
0.00833333 |
1km: 0.00833333 |
| Spatial_resolution_unit |
degree |
|
| Slope |
0.01 |
Variable |
| Unit |
K |
|
| Mask_for_statistics |
2048 |
Detail：QA_flag information（～L3_mask） |
| CLTYPE |
| CLTYPE |
Data_description |
Cloud Type under ISCCP Cloud Type Classification Definition
0:Clear
1:Cirrus
2:Cirrostratus
3:Deep convection
4:Altocumulus
5:Altostratu
6:Nimbostratus
7:Cumulus
8:Stratocumulus
9:Stratoss
10:Unknown
11:High cloud
12:Middle cloud
13:Low cloud
14:Unknown
255:Error (1-10 for daytime, 11-14 for nighttime) |
|
| Error_DN |
255 |
|
| Maximum_valid_DN |
14 |
Variable |
| Minimum_valid_DN |
0 |
Variable |
| Offset |
0 |
Variable |
| Spatial_resolution |
0.00833333 |
1km: 0.00833333 |
| Spatial_resolution_unit |
degree |
|
| Slope |
1 |
Variable |
| Unit |
Dimensionless |
|
| Mask_for_statistics |
0 |
Detail：QA_flag information（～L3_mask） |
How to use
- ・Physical quantity＝DN*slope + offset
