jspredict-dc
Version:
Satellite propagation and visibility utilities built on satellite.js.
18 lines (16 loc) • 490 B
JavaScript
// 这些常量用于统一角度、距离和时间换算，保持与底层轨道库一致的单位体系。
const deg2rad = Math.PI / 180;
const rad2deg = 180 / Math.PI;
module.exports = {
deg2rad,
rad2deg,
earthRadiusKm: 6378.137,
earthDiameterKm: 12756.274,
solarRadiusKm: 696000,
astronomicalUnitKm: 149597870.7,
muKm3PerS2: 398600.5,
msPerDay: 24 * 60 * 60 * 1000,
defaultMinElevation: 4,
defaultStepSeconds: 60,
defaultMaxIterations: 99999,
};