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This page will be updated soon to allow downloading version 3.00 of RadEst. In the mean time, besides the current version of RadEst, you can download the current version of the help file of RadEst3.00 (103 kb) RE300help.zip
The RadEst program evaluates daily global solar radiation values for a location at a given latitude and estimates daily values. Four models are available to estimate daily radiation from air temperature data; they include and are all derived from the model proposed by Bristow and Campbell (1984). All the models estimate atmospheric transmissivity of global solar radiation based on the difference between maximum and minimum temperature. The estimated value of radiation is calculated as the product of the estimated transmissivity by the value of potential radiation outside the earth atmosphere. Utilities allow a graphical evaluation of the estimates and compute statistical indices for model/location comparison. For each model, one parameter can be fitted using an iterative procedure. Estimated values can be saved as ASCII files. A batch-run generator allows processing easily many files. Utilities allow correcting sistematic bias in measured data and evaluating long series of recorded data.
The downloadable file is a Zip file (3.9 Mb); you need a program like WinZip to unpack the data. To install, after downloading the program open the zip file and double click on the file setup.exe, and follow the instructions
