ham/aprs.js
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maze
2026-03-11 17:56:15 +01:00
parent 5d537975e9
commit 08177f4e6f
1 changed files with 7 additions and 7 deletions
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14
src/position.ts
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@@ -57,14 +57,14 @@ export class Position implements IPosition {
public distanceTo(other: IPosition): number {
const R = 6371e3; // Earth radius in meters
const φ1 = this.latitude * Math.PI / 180;
const φ2 = other.latitude * Math.PI / 180;
const Δφ = (other.latitude - this.latitude) * Math.PI / 180;
const Δλ = (other.longitude - this.longitude) * Math.PI / 180;
const lat1 = this.latitude * Math.PI / 180;
const lat2 = other.latitude * Math.PI / 180;
const dLat = (other.latitude - this.latitude) * Math.PI / 180;
const dLon = (other.longitude - this.longitude) * Math.PI / 180;
const a = Math.sin(Δφ/2) * Math.sin(Δφ/2) +
Math.cos(φ1) * Math.cos(φ2) *
Math.sin(Δλ/2) * Math.sin(Δλ/2);
const a = Math.sin(dLat/2) * Math.sin(dLat/2) +
Math.cos(lat1) * Math.cos(lat2) *
Math.sin(dLon/2) * Math.sin(dLon/2);
const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
return R * c; // Distance in meters