npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

nutation.js

v0.4.0

Published

nutation by js

Downloads

19

Readme

介绍

基于js的章动计算实现 ⚠⚠⚠(Math.PI = 3.141592653589793)计算基于JSΠ的最大值 本项目主要用于Taogram的节气算法辅助使用,非标准天文项目。

算法

IAU1980/IAU2000B可选 IAU2000A 施工中

使用说明

引用

const Nutation = require("nutation.js");
const nutation = new Nutation(jde,IAU,FULL);
<!-- longitude nutation -->
nutation.longitude();
<!-- obliquity nutation -->
nutation.obliquity();

参数

  • jde 给定任意时刻的,基于力学时的儒略日

  • IAU 章动的算法实现,默认基于IAU2000B算法的实现,也可以选择IAU1980. 算法的章动序列表为简化序列表参考(/src/data/)

const nutation = new Nutation(jde,1980/2000b);
  • FULL true/false 是否使用简化的章动库,当前仅1980有效

返回值

基于角度单位的值

参考资料

  • 《IAU1976、1980及2000A岁差章动模型的比较》
  • 《1980IAU章动理论最终报告》
  • 《Astronomical.Algorithms》