You will be helped in picking valid values for those parameters by dropdown selectors and / or auto - complete. (elearningindustry.com)
The above evidence strongly suggests that accounting for course tracks is important to obtaining valid value - added estimates in middle and high school, but we do not yet know how well this solves the problem. (carnegieknowledgenetwork.org)
The way one could achieve valid values for insolation changes - as I did, as a check on my own independent calculations - is to download Berger's FORTRAN program from his FTP site, and run it for equal time steps (e.g. day - by - day time steps) for any two epochs one might like to choose: say 1900 and 2000. (skepticalscience.com)