EarSunDis {FAO56}

Inverse Earth-Sun Distance (d_r)

Description

EarSunDis returns the inverse earth-sun distance.

Usage

EarSunDis(date)

Arguments

date

Optional. A character string that denotes the date in the format "Year-Month-Day" or "Year/Month/Day".

Details

This is a function to calculate the inverse earth-sun distance.

Value

The function returns the value of inverse relative earth-sun distance as a numeric scalar.

Reference

Allen, R. G., Pereira, L. S., Raes, D., & Smith, M. (1998). Crop evapotranspiration - Guidelines for computing crop water requirements - FAO Irrigation and drainage paper 56. Fao, Rome, 300(9), D05109.

See Also

JulDate.

Examples

EarSunDis("2020/08/25")