footprintAngle関数
リファレンスの説明と例は英語です。見出しと目次は日本語です。
The angle at the Earth's centre between the point below a satellite and the edge of its footprint, in radians: the ground circle from which the satellite is above elevation.
It is acos(R cos(e) / (R + h)) - e for the Earth's radius R, the height h and the elevation e. A satellite on or under the ground, or an elevation of 90 degrees or more, has none.
インポート
import { footprintAngle } from "@johnmorrisdotca/chikyu-earth/space";定義
function footprintAngle(heightKm: number, elevation?: number): number引数
| 名前 | 型 | 説明 |
|---|---|---|
heightKm | number | The satellite's height above the ground, in kilometres. |
elevation (省略可) | number | The least elevation, in degrees. 25 when left out. |
戻り値
number
The angle, in radians, from 0 up to a quarter of a turn.
例
import { footprintAngle } from "@johnmorrisdotca/chikyu-earth/space";
console.log((footprintAngle(420) * 180) / Math.PI);6.760501126057435出力（このページを作ったときに実行した結果）
この日本語は、まだ日本語を母語とする方の確認を受けていません。訂正を歓迎します。