Solar medium suntime — sol_medium

Calculates the solar medium suntime, which is the mean solar time adjusted for the observer's longitude.

Usage

sol_medium_suntime(...)

# Default S3 method
sol_medium_suntime(datetime, lon, ...)

# S3 method for class 'weather_station'
sol_medium_suntime(weather_station, ...)

Arguments

...: Named station fields, site parameters or model assumptions.
datetime: POSIXlt or POSIXct date-time vector.
lon: Longitude in degrees.
weather_station: A weather_station object.

Value

Hour.

Details

The solar medium suntime ($T_m$) is calculated as: $$T_m = T_{local} + \frac{lon}{15}$$ where: $T_{local}$ is the local time zone, $lon$ is the longitude of the observer.

References

Bendix 2004, p. 243.

Examples

# Calculate solar medium suntime
sol_medium_suntime(as.POSIXlt("2022-06-21 12:00:00"), lon = 10)
#> [1] 10.66667