feat: ✨ merge sun calculations

.eslintrc.json

@@ -46,7 +46,7 @@
     "func-call-spacing": "error",
     "func-name-matching": "error",
     "func-names": "error",
-    "func-style": "error",
+    "func-style": "off",
     "function-call-argument-newline": "off",
     "function-paren-newline": "off",
     "generator-star-spacing": "error",

examples/README

@@ -0,0 +1,4 @@
+Run the examples using ts-node.
+
+Example:
+npx ts-node .\examples\julian.ts -p ./examples/tsconfig.json

examples/sun.ts

@@ -0,0 +1,5 @@
+import { Degrees, Meters } from '@src/ootk';
+import { Sun } from '../src/body/Sun';
+/* eslint-disable no-console */
+
+console.log(Sun.getTimes(new Date(), 41 as Degrees, -71 as Degrees, 0 as Meters));

examples/tsconfig.json

@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "target": "ES2015",
+    "baseUrl": "../",
+    "paths": {
+      "@lib/*": ["lib/*"],
+      "@dist/*": ["dist/*"],
+      "@src/*": ["src/*"],
+      "@test/*": ["test/*"]
+    }
+  }
+}

package.json

@@ -53,7 +53,7 @@
     "opener": "^1.5.2",
     "prettier": "^2.8.8",
     "prettier-plugin-organize-imports": "^3.2.3",
-    "ts-node": "^10.9.1",
+    "ts-node": "^10.9.2",
     "typescript": "^4.9.5",
     "webpack": "^5.11.1",
     "webpack-cli": "^4.10.0"

src/body/Star.ts

@@ -0,0 +1,36 @@
+import { AzEl, Degrees, RaDec, Radians } from '@src/ootk';
+import { Sun } from './Sun';
+
+export class Star {
+  private constructor() {
+    // disable constructor
+  }
+
+  static getStarAzEl(date: Date, lat: Degrees, lon: Degrees, ra: Radians, dec: Radians): AzEl<Radians> {
+    const c: RaDec = {
+      ra,
+      dec,
+    };
+    const azEl = Sun.azEl(date, lat, lon, c);
+
+    const el = <Radians>(azEl.el + Star.astroRefraction(azEl.el)); // elevation correction for refraction
+
+    return {
+      az: azEl.az,
+      el,
+    };
+  }
+
+  /**
+   * get astro refraction
+   * @param {Radians} h - elevation
+   * @returns {number} refraction
+   */
+  static astroRefraction(h: Radians): Radians {
+    if (h < 0) {
+      h = <Radians>0;
+    }
+
+    return <Radians>(0.0002967 / Math.tan(h + 0.00312536 / (h + 0.08901179)));
+  }
+}