solar_day_info: Identify Solar Day Information

In ltertools: Tools Developed by the Long Term Ecological Research Community

Identify Solar Day Information

Description

For all days between the specified start and end date, identify the time of sunrise, sunset, and solar noon (in UTC) as well as the day length. The idea for this function was contributed by Miguel C. Leon and a Python equivalent lives in the Luquillo site's LUQ-general-utils GitHub repository.

Usage

solar_day_info(
  lat = NULL,
  lon = NULL,
  start_date = NULL,
  end_date = NULL,
  quiet = FALSE
)

Arguments

lat	(numeric) latitude coordinate for which to find day length
lon	(numeric) longitude coordinate for which to find day length
start_date	(character) starting date in 'YYYY-MM-DD' format
end_date	(character) ending date in 'YYYY-MM-DD' format
quiet	(logical) whether to suppress certain non-warning messages. Defaults to TRUE

Value

(dataframe) table of 6 columns and a number of rows equal to the number of days between the specified start and end dates (inclusive). Columns contain: (1) date, (2) sunrise time, (3) sunset time, (4) solar noon, (5) day length, and (6) time zone of columns 2 to 4.

Examples

## Not run: 
# Identify day information in Santa Barbara (California) for one week
solar_day_info(lat = 34.416857, lon = -119.712777, 
               start_date = "2022-02-07", end_date = "2022-02-12", 
               quiet = TRUE)

## End(Not run)

ltertools documentation built on April 11, 2025, 6:14 p.m.