vessel_sun_angle: Calculate sun angle for a vessel based on 'datetime', 'x',...

In ericmkeen/shipstrike: Utilities for spatially- and temporally-explicit predictions of whale-ship collisions

Calculate sun angle for a vessel based on datetime, x, and y

Description

This is essentially a convenient wrapper for suncalc::getSunlightPosition.

Usage

vessel_sun_angle(vessels, verbose = FALSE)

Arguments

vessels	A date.frame that has at least the following following columns: datetime = Datetime in UTC, with format ⁠yyyy-mm-dd hh:mm:ss⁠. x = Longitude, decimal degrees (Western degrees negative). y = Latitude, decimal degrees (Southern degrees negative).
verbose	A Boolean; if TRUE, updates will be printed to the Console.

Value

A vector, the same length as the number of rows in vessels, with the local vertical angle of the sun at each row.

Examples

data(ais_2019)
vessel_sun_angle(ais_2019)

ericmkeen/shipstrike documentation built on May 21, 2023, 7:05 a.m.