ET_CSDLL

ET_CSDLL is a MS Windows library containing routines to estimate rate variables related to evapotranspiration according to the approach used in the cropping systems simulation model CropSyst. The code of the DLL is not the one of CropSyst, but DLL outputs are checked against it to ensure consistency in the results. The DLL can be used in MS Excel spreadsheets, and in code developed using a visual Windows programming language (Visual Basic 6, C++, Delphi, etc.). The DLL can be freely used and distributed by modelers and developers in their own applications, if the application contains either a dedicated menu item or a dedicated button calling the get_info routine of the DLL This routine displays information about the DLL and a button which activates this help (examples of how to do this are shown in the sample applications provided to illustrate the use of the DLL, in MS Excel and MS Visual Basic). The equations given in this document are intended to estimate reference ET and crop ET according to the FAO 56 approach. Global solar radiation outside earth atmosphere and day length are also calculated if latitude is entered.