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0251c74109
Wind (NOAA GFS and ECMWF IFS: animated particles, colour field, a reading at map centre), observed weather (NOAA MRMS radar, GOES and NESDIS infrared clouds, lightning density) on one shared history timeline, NHC and CPHC cyclone advisories with tracks and cones, and a WEATHER panel in the right rail. On 3D Tiles the observed products render as raised shells with a sharper window around the view. Co-authored-by: Gustavo Beneduzi <[email protected]> Co-authored-by: Daniel Slay <[email protected]> Co-authored-by: Rehaan Delmotra <[email protected]> Co-authored-by: Cursor Agent <[email protected]>
43 lines
2.2 KiB
JavaScript
43 lines
2.2 KiB
JavaScript
// src/data/issPass.test.mjs
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import { test } from 'node:test';
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import assert from 'node:assert/strict';
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import { twoline2satrec } from 'satellite.js';
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import { findNextIssPass, lookAnglesAt } from './issPass.js';
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import { findNextSatellitePass } from './satellitePass.js';
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// Canonical archived ISS TLE (valid checksums; epoch 2008-09-20 ~12:25 UTC).
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const L1 = '1 25544U 98067A 08264.51782528 -.00002182 00000-0 -11606-4 0 2927';
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const L2 = '2 25544 51.6416 247.4627 0006703 130.5360 325.0288 15.72125391563537';
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const AUSTIN = { latDeg: 30.2672, lonDeg: -97.7431 };
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const FROM_MS = Date.UTC(2008, 8, 20, 12, 30, 0); // just after the TLE epoch
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test('finds a structurally-consistent ISS pass within 24h of the TLE epoch', () => {
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const satrec = twoline2satrec(L1, L2);
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const pass = findNextIssPass({ satrec, ...AUSTIN, fromMs: FROM_MS, minElevDeg: 10 });
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assert.ok(pass, 'expected a pass within 24h at 30°N for a 51.6° inclination orbit');
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assert.ok(pass.riseMs > FROM_MS);
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assert.ok(pass.riseMs < pass.maxElevMs && pass.maxElevMs < pass.setMs);
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assert.ok(pass.maxElevDeg >= 10);
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assert.ok(pass.riseAzDeg >= 0 && pass.riseAzDeg < 360);
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// Independent re-check: elevation at the reported peak really is the max-ish
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// and ≥ threshold; one minute before rise it is below threshold.
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const peak = lookAnglesAt(satrec, pass.maxElevMs, AUSTIN.latDeg, AUSTIN.lonDeg);
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assert.ok(peak && Math.abs(peak.elevDeg - pass.maxElevDeg) < 1.5);
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const before = lookAnglesAt(satrec, pass.riseMs - 60_000, AUSTIN.latDeg, AUSTIN.lonDeg);
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assert.ok(before && before.elevDeg < 10);
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});
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test('forwards its original 30 s coarse step and fineStepSec to the pass engine', () => {
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const satrec = twoline2satrec(L1, L2);
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const opts = { satrec, ...AUSTIN, fromMs: FROM_MS, minElevDeg: 10, fineStepSec: 30 };
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assert.deepEqual(findNextIssPass(opts), findNextSatellitePass({ ...opts, coarseStepSec: 30 }));
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assert.notDeepEqual(findNextIssPass(opts), findNextIssPass({ ...opts, fineStepSec: 5 }));
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});
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test('returns null when no pass clears an absurd threshold', () => {
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const satrec = twoline2satrec(L1, L2);
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const pass = findNextIssPass({ satrec, ...AUSTIN, fromMs: FROM_MS, minElevDeg: 89.9, horizonHours: 2 });
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assert.equal(pass, null);
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});
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