Convert DateTime from UTC to local solar time
Source:R/convert_UTC_to_solartime.R
convert_UTC_to_solartime.RdConvert DateTime from UTC to local solar time, which may be either apparent solar (perfect match between noon and solar zenith) or mean solar (exactly 24 hours between solar noons).
Usage
convert_UTC_to_solartime(
date.time,
longitude,
time.type = c("apparent solar", "mean solar")
)Arguments
- date.time
date-time values in POSIXct format and UTC timezone.
- longitude
numeric, in degrees, either positive and unitted ("degE" or "degW") or with sign indicating direction (positive = East)
- time.type
character. "apparent solar", i.e. true solar time, is noon when the sun is at its zenith. "mean solar" approximates apparent solar time but with noons exactly 24 hours apart. Elsewhere in this package, variables named "solar.time" are mean solar time, whereas "app.solar.time" is apparent solar and "any.solar.time" is either.