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Python astral library ported to Go

 3 years ago
source link: https://sj14.gitlab.io/post/2021/04-19-astral-go/
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Python astral library ported to Go

2021-04-19

Calculations for the position of the sun and moon.

This is a Go port of the Python astral package. Check out the latest Go version on Github.

The astral package provides the means to calculate the following times of the sun:

  • sunrise
  • midnight
  • sunset
  • daylight
  • night
  • twilight
  • blue hour
  • golden hour
  • rahukaalam TODO

plus solar azimuth and elevation at a specific latitude/longitude. It can also calculate the moon phase for a specific date.

Besides the package for usage in you own programs, we also provide a tool for showing the data.

Installation

go get github.com/sj14/astral/cmd/astral

Usage

Usage of astral:
  -elev float
        elevation of the observer
  -format string
        time output format according to Go parsing (default "Jan _2 15:04:05")
  -lat float
        latitude of the observer
  -long float
        longitude of the observer
  -time string
        day/time used for the calculation (defaults to current time)

Example

$ astral -lat 51.58 -long 6.52
Sun Apr 18 11:12:45 CEST 2021
Latitude 51.58 Longitude 6.52 Elevation 0
Apr 18 05:55:07 Dawn
Apr 18 05:55:07 Blue Hour Start
Apr 18 06:09:04 Blue Hour End
Apr 18 06:09:04 Golden Hour Start
Apr 18 06:31:44 Sunrise
Apr 18 07:15:56 Golden Hour End
Apr 18 13:33:18 Noon
Apr 18 19:51:24 Golden Hour Start
Apr 18 20:35:45 Sunset
Apr 18 20:58:33 Golden Hour End
Apr 18 20:58:33 Blue Hour Start
Apr 18 21:12:35 Blue Hour End
Apr 18 21:12:35 Dusk
Apr 19 01:33:13 Midnight
Moon Phase: New Moon (5.47788888888889)

report

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