Day Sea Spray RGB
Alternative name: Sea Spray RGB
Main applications
- Detection of sea spray and other aerosols over water, particularly in cold regions.
Remarks
- Sea spray may indicate the presence of freezing spray, which poses a significant maritime hazard, especially during winter conditions.
- This RGB is specifically tuned for high-latitude environments, where freezing spray events are more likely.
- Sea spray typically appears in light blue, cyan, or gray, over a dark blue water serface.
- Other aerosols may appear light blue, pink, gray, or white, depending on their optical thickness, solar illumination, and viewing geometry.
- Land surfaces are rendered as:
- light green if snow-free
- light cyan if snow-covered
- white, depending on surface temperature.
- Clouds appear white.
- Sun glint may affect image interpretation.
- Validation to date is limited to the Gulf of Alaska, using ABI and VIIRS data.
ABI Day Sea Spray RGB
| Colour beam | Channel (difference) | Range min | Range max | Unit | Gamma |
|---|---|---|---|---|---|
| Red | IR3.9 - IR10.4 | 0 | 5 | K | 1.0 |
| Green | NIR0.86 | 1 | 9 | % | 5/3 |
| Blue | VIS0.64 | 2 | 12 | % | 5/3 |
VIIRS Day Sea Spray RGB
| Colour beam | Channel (difference) | Range min | Range max | Unit | Gamma |
|---|---|---|---|---|---|
| Red | IR3.7 - IR11.4 | 0 | 10 | K | 1.0 |
| Green | NIR0.86 | 1 | 20 | % | 5/3 |
| Blue | VIS0.64 | 2 | 25 | % | 5/3 |
Next steps / Recommendations
- More validation is required across:
- Additional satellite sensors
- Different regions globally where sea spray is a concern
- Feedback from the operational users is required.