Cloud flag/Classification (CLFG)
Introduction
| CLFG | Definition | Cloud discrimination flag including the classification of cloud type and phase (liquid/solid). |
| Unit | none | |
| ATBD |
Ver.1 (Jul. 2019) Ver.3 (Oct. 2021) |
Update contents of Ver.2
- ・None
Update contents of Ver.3
- ・Improved accuracy of detecting cloud, ice/snow, and heavy aerosols using deep neural network method.
- ・Changes in Error_DN, Maximum_valid_DN, Minimum_valid_DN.
Sample image
| File format | Ver.1 | Ver.2 | Ver.3 | hdf5 |
To be uploaded |
CLFGQ(250m) |
CLFGQ(250m) CLFGF(1/24deg) |
|---|---|---|---|
| JPEG |
To be uploaded |
Cloud_flag(250m) |
Cloud_flag(250m) Cloud_flag(1/24deg) |
Dataset name
| Ver.1,2,3 |
|---|
| Cloud_flag |
QA_flag information
- None
Attribute information
How to use
- ・Valid values are during Minimum_valid_DN～Maximum_valid_DN
- ・Cloud_flag information
| Bit | Ver.1,2,3 | Description |
|---|---|---|
| 0 | Algorithm Execution | 0 = Not executed, 1 = Executed |
| 1 | Clear Confidence Level | 000 = 0.00 (Cloudy) 001 = 0.00 - 0.17 010 = 0.17 - 0.33 011 = 0.33 - 0.50 100 = 0.50 - 0.67 101 = 0.67 - 0.83 110 = 0.83 - 1.00 111 = 1.00 (Clear) |
| 2 | ||
| 3 | ||
| 4 | Day/Night | 0 = Night , 1 = Day |
| 5 | Land/Water | 0 = Water , 1 = Land |
| 6 | Snow/Ice | 0 = Yes , 1 = No |
| 7 | Sun Glint Cone Angle | 00 = 0 - 15 [deg.] 01 = 15 - 25 10 = 25 - 35 11 = 35 |
| 8 | ||
| 9 | Heavy Aerosol | 0 = Yes , 1 = No |
| 10 | Cirrus Probabilty | 0 = Yes , 1 = No |
| 11 | Cloud Inhomogeneity | 0 = Yes , 1 = No |
| 12 | Phase | 00 = Uncertain 01 = Water 10 = Ice 11 = Mixed |
| 13 | ||
| 14 | Cloud Shadow | 0 = Yes , 1 = No |
| 15 | VN Data Availability | 0 = Not available, 1 = Available |