Examples
Examples
Try the starting example
- Extinction coefficient (per km)
- 0.2
- Contrast threshold fraction
- 0.02
- Homogeneous meteorological visibility (km)
- 19.560115
Try another scenario
- Extinction coefficient (per km)
- 0.22000000000000003
- Contrast threshold fraction
- 0.02
- Homogeneous meteorological visibility (km)
- 17.781923
Calculation method
Calculation method
Homogeneous meteorological visibility (km)
Koschmieder contrast distance=-ln(threshold)/extinction.
Symbols and units
- a
- Extinction coefficient (per km)
- b
- Contrast threshold fraction
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Homogeneous atmosphere; ideal dark target on bright background. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Homogeneous atmosphere; ideal dark target on bright background.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.