R.sun: Difference between revisions
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=== Time step === | === Time step === | ||
The following three images demonstrate the effects of using different ''step'' parameters. | The following three images demonstrate the effects of using different time '''step''' parameters. | ||
r.sun -s elevin="gauss" glob_rad="rad.global.30minT" day=180 | |||
[[File:Gauss_30min.png|400px|thumb|center|Default 30 minute time step over a Gaussian mound.]] | |||
r.sun -s elevin="gauss" glob_rad="rad.global.15minT" day=180 | r.sun -s elevin="gauss" glob_rad="rad.global.15minT" day=180 | ||
[[File:Gauss_15min.png|400px|thumb|center|15 minute time step over a Gaussian mound.]] | |||
r.sun -s elevin="gauss" glob_rad="rad.global.03minT" day=180 | r.sun -s elevin="gauss" glob_rad="rad.global.03minT" day=180 | ||
[[File:Gauss_03min.png|400px|thumb|center|3 minute time step over a Gaussian mound.]] | |||
The 3 minute time step takes roughly ten times as long to run as the 30 minute timestep. | The 3 minute time step takes roughly ten times as long to run as the 30 minute timestep. | ||
Revision as of 09:54, 19 May 2009
r.sun
Help page
- r.sun manual page
Tips
Testing
Create an artificial surface containing a Gaussian mound:
r.surf.volcano out=gauss method=gaussian kurtosis=1
Time step
The following three images demonstrate the effects of using different time step parameters.
r.sun -s elevin="gauss" glob_rad="rad.global.30minT" day=180
r.sun -s elevin="gauss" glob_rad="rad.global.15minT" day=180
r.sun -s elevin="gauss" glob_rad="rad.global.03minT" day=180
The 3 minute time step takes roughly ten times as long to run as the 30 minute timestep.