ootk-core
Version:
Orbital Object Toolkit. A modern typed replacement for satellite.js including SGP4 propagation, TLE parsing, Sun and Moon calculations, and more.
58 lines • 2.42 kB
JavaScript
/**
* @author Theodore Kruczek.
* @license MIT
* @copyright (c) 2022-2025 Theodore Kruczek Permission is
* hereby granted, free of charge, to any person obtaining a copy of this
* software and associated documentation files (the "Software"), to deal in the
* Software without restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
import { hpAtmosphere } from './hpAtmosphere.js';
import { HpAtmosphereResult } from './HpAtmosphereResult.js';
// / Container for Harris-Priester atmosphere data.
export class HpAtmosphereData {
table_;
hMin_;
hMax_;
constructor(table) {
this.table_ = table;
if (table.length === 0 || typeof table[0]?.[0] === 'undefined') {
throw new Error('Table must have at least one valid entry.');
}
this.hMin_ = table[0][0];
this.hMax_ = table[table.length - 1]?.[0] ?? 0;
}
static fromVals(vals) {
const output = [];
for (const v of vals) {
const [h, minD, maxD] = v;
output.push([h, minD, maxD]);
}
return new HpAtmosphereData(output);
}
getAtmosphere(height) {
if (height < this.hMin_ || height > this.hMax_) {
return null;
}
let index = 0;
while (index < this.table_.length - 2 && height > this.table_[index + 1][0]) {
index++;
}
return new HpAtmosphereResult(height, this.table_[index], this.table_[index + 1]);
}
}
export const hpAtmosphereData = HpAtmosphereData.fromVals(hpAtmosphere);
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