https://github.com/tomwhite/dusk

A program to plot the time of dusk over the year for any given location on the Earth's surface
https://github.com/tomwhite/dusk

d3 geometry mathematics time visualization

Last synced: 7 days ago
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A program to plot the time of dusk over the year for any given location on the Earth's surface

• Host: GitHub
• URL: https://github.com/tomwhite/dusk
• Owner: tomwhite
• Created: 2015-11-21T11:08:32.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2019-11-16T12:53:12.000Z (about 5 years ago)
• Last Synced: 2024-12-06T19:11:35.127Z (about 2 months ago)
• Topics: d3, geometry, mathematics, time, visualization
• Language: HTML
• Homepage: http://tomwhite.github.io/dusk/
• Size: 381 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
A program to plot the time of [dusk](https://en.wikipedia.org/wiki/Dusk) over the year for any given location on the

Earth's surface. Curves for official (0° below horizon), civil (6°), nautical (12°), and astronomical (18°) dusk are

shown.

**November 2019 update: the United States Naval Observatory site used for sunrise and sunset data has been taken down until

April 2020, see https://www.researchgate.net/post/What_has_happened_to_wwwusnonavymil**

To run, first generate a data file as follows (you will need to change the lat/long parameters for other locations):

```bash

./fetch_crick.sh

python convert.py > target/data/crick.tsv

cp target/data/crick.tsv data.tsv

```

or, for San Francisco:

```bash

./fetch_sf.sh

python convert.py > target/data/sf.tsv

cp target/data/sf.tsv data.tsv

```

Next, run a local server:

```bash

python -m SimpleHTTPServer

```

then visit http://localhost:8000/ to see the plot.

=== Java version ===

There's also a Java version, which may not be quite as accurate.

```bash

mvn -q exec:java -Dexec.mainClass=com.tom_e_white.dusk.Dusk > data.tsv

```