astro_calculations

astro_calculations is a Dart package for astronomical calculations. astro_calculations is inspired by Pysolar and based on this pdf by Ibrahim Reda and Afshin Andreas.

astro_calculations is currently a work in progress. It will soon support many more calculations.

Usage

SUNRISE TIME
By default all functions return DateTime object for UTC. To get it in Local format, pass isLocal as true.

  final latitude = 28.6139;
  final longitude = 77.2090;
  final dateTime = DateTime.utc(2020, 12, 30);

  final sunRiseTime =
      getSunRiseTime(latitude, longitude, dateTime, isLocal: true);

SUNSET TIME

 final sunSetTime =
      getSunSetTime(latitude, longitude, dateTime, isLocal: true);

SUN TRANSIT TIME

 final sunTransitTime =
      getSunTransitTime(latitude, longitude, dateTime, isLocal: true);

AZIMUTH ANGLE OF SUN

 final azimuthAngle =
      getSunAzimuthAngle(latitude, longitude, elevation); //elevation is w.r.t. Sea level

Example

void main() {
  final latitude = 28.6139;
  final longitude = 77.2090;
  final dateTime = DateTime.utc(2020, 12, 30);

  final sunRiseTime =
      getSunRiseTime(latitude, longitude, dateTime, isLocal: true);
  final sunSetTime =
      getSunSetTime(latitude, longitude, dateTime, isLocal: true);
  final sunTransitTime =
      getSunTransitTime(latitude, longitude, dateTime, isLocal: true);

  print('Sunrise Time: $sunRiseTime');
  print('Sunset Time: $sunSetTime');
  print('Sun Transit Time: $sunTransitTime');
}

OUTPUT

Sunrise Time: 2020-12-30 07:13:20.000
Sunset Time: 2020-12-30 17:34:16.000
Sun Transit Time: 2020-12-30 12:23:46.000

Created from templates made available by Stagehand under a BSD-style license.