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The program performs the following
procedure according to Regalado and Ritter. 2007. An alternative method
to estimate zero flow temperature differences for Granier’s thermal
dissipation technique. Tree Physiology 27: 1093-1102.
1. Filter data according to Rad>10
W/m2.
2.
Evapotranspiration:
- Compute Penman-Monteith ETp for parameters in etpm.cfg
- Uses the evapotransporation data given in
the input file
3.
Find time lag that overlaps ETp* and SFD* series (lag< ±5)
4.
Select (1/DT, ETp^1/beta) data points such that ETp*=SFD* ±tol(0.05).
5.
Choose from selected data points those that satisfy ETp*>=0.10
6.
Add DTnight to selected cases
7.
Perform robust linear regression rendering DTmax
8.
Compute RMSE between SFD calculated using DTnight and DTmax
Note: In the actual version the value of the tolerance to select data points such that ETp*=SFD* ±tolerance (step 4) and the
ET limit to select data points that satisfy ETp*>=ET limit (step 5)
can be modified by the user by changing them in the config.txt.
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FITDTMAX 
