get_d_r: Get inverse relative distance Earth-Sun (Eq 23)
In gopalpenny/fao56:

Get inverse relative distance Earth-Sun (Eq 23)

1	get_d_r(date)

date

date object or numeric jday

Return inverse relative distance. Evaluates the equation:

d_r = 1 + 0.033 * cos(2 * pi/ 365 * jday)

## Not run: 
get_d_r("2019-04-15")
get_d_r(105, "%j")

## End(Not run)

gopalpenny/fao56 documentation built on Feb. 14, 2022, 6:01 a.m.

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