Lu: Estimates upward facing ground radiation (W/m2)
In Thermimage: Thermal Image Analysis
Description
Usage
Arguments
Details
Value
Author(s)
References
See Also
Examples
Description
Estimates upward facing ground radiation (W/m2), from the Stephan Boltzmann relationship and ground temperature
Usage
1
Lu(Tg = 20, Eground = 0.97)
Arguments
Tg
Ground temperature (degrees celsius)
Eground
Emissivity of soil or ground. Default value is 0.97.
Details
Calculates ground radiation facing upward. Assumes ground emissivity = 0.97. Terrain emissivities vary from 0.89 (sand, snow) to 0.97 (moist soil) - Blaxter, 1986
Value
A value, vector of length one, corresponding to the longwave radiation from the ground, units: W/m2.
Author(s)
Glenn J Tattersall
References
Blaxter, 1986. Energy metabolism in animals and man. Cambridge University Press, Cambridge, UK, 340 pp.
See Also
Examples
1
2
3
4
5
# Estimates ground generated longwave radiation rising up. Units W/m2.
# Example calculation:
Tg<-30
Eground<-0.97
Lu(Tg, Eground)
Thermimage documentation built on Sept. 27, 2021, 5:11 p.m.
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Description Usage Arguments Details Value Author(s) References See Also Examples
Description
Estimates upward facing ground radiation (W/m2), from the Stephan Boltzmann relationship and ground temperature
Usage
1 | Lu(Tg = 20, Eground = 0.97)
|
Arguments
Tg |
Ground temperature (degrees celsius) |
Eground |
Emissivity of soil or ground. Default value is 0.97. |
Details
Calculates ground radiation facing upward. Assumes ground emissivity = 0.97. Terrain emissivities vary from 0.89 (sand, snow) to 0.97 (moist soil) - Blaxter, 1986
Value
A value, vector of length one, corresponding to the longwave radiation from the ground, units: W/m2.
Author(s)
Glenn J Tattersall
References
Blaxter, 1986. Energy metabolism in animals and man. Cambridge University Press, Cambridge, UK, 340 pp.
See Also
Examples
1 2 3 4 5 | # Estimates ground generated longwave radiation rising up. Units W/m2.
# Example calculation:
Tg<-30
Eground<-0.97
Lu(Tg, Eground)
|
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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