Summary of bit processing for 1.25-km cloud mask:
| cmsk value |
bit 7 |
bit 6 |
bit 5 |
bit 4 |
bit 3 |
bit 2 |
bit 1 |
bit 0 |
| 200 |
1 |
1 |
0 |
0 |
1 |
0 |
0 |
0 |
| 255 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
bit 7: 0 = clear, 1 = cloudy
bit 6: 0 = not ice, 1 = ice (as derived from AVHRR)
bit 5: 0 = not ice, 1 = ice (as derived from SSM/I)
bit 4: 0 = not coastline, 1 = coastline
bit 3: 0 = water, 1 = land
bits 0,1,2: values of 0 to 7 (designating a cloud masking region)
For example, a data value of 200 specifies cloudy, ice as derived from AVHRR, not ice as derived from SSM/I, not coastline, land, and cloud masking region 0. A value of 255 indicates missing data.
