passPath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 satellite's track across the sky for a pass: a point every stepSeconds from the pass's start to its end, with the first and last on the start and the end. Draw it with skySvg.
インポート
import { passPath } from "@johnmorrisdotca/chikyu-earth/passes";定義
function passPath(set: ElementSet, observer: Observer, pass: SatellitePass, stepSeconds?: number): PathPoint[]引数
| 名前 | 型 | 説明 |
|---|---|---|
set | ElementSet | The satellite's elements (the one the pass was found from). |
observer | Observer | Where the watcher stands. |
pass | SatellitePass | A pass from |
stepSeconds (省略可) | number | Seconds between points (5 by default). |
戻り値
PathPoint[]
The points, in time order.
例
import { findPasses, passPath } from "@johnmorrisdotca/chikyu-earth/passes";
const iss = {
OBJECT_NAME: "ISS (ZARYA)",
EPOCH: "2026-11-02T10:25:21.580320",
MEAN_MOTION: 15.49150046,
ECCENTRICITY: 0.0007139,
INCLINATION: 51.6332,
RA_OF_ASC_NODE: 335.9757,
ARG_OF_PERICENTER: 339.3739,
MEAN_ANOMALY: 20.6961,
NORAD_CAT_ID: 25544,
BSTAR: 0.00012,
MEAN_MOTION_DOT: 0.0001,
MEAN_MOTION_DDOT: 0,
};
const place = { latitude: 51.5, longitude: -0.13 };
const day = Date.UTC(2026, 10, 3);
const [first] = findPasses(iss, place, { from: day, to: day + 3 * 86_400_000 }, { all: true });
console.log(first ? passPath(iss, place, first).length : 0);83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。