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Chikyu Earth地球

A line-drawn globe of the world's countries that turns at the Earth's own rate, with an optional realistic Earth from space and markers for any place.

Chikyu is the Japanese word 地球 for the Earth. About the name

Contents

Reference · Passes: when a satellite crosses the sky over a place

ESTIMATED_CROSS_SECTIONSconstant

The average cross-sections, in square metres, that this package assumes for the bright satellites it names by NORAD number: the ISS (25544), China's Tianhe (48274) and the Hubble Space Telescope (20580). They are rough working figures from the sizes space agencies publish (the ISS's solar array length of 73 m and wingspan of 109 m, Hubble's 13.2 m long and 4.2 m wide body with two solar arrays, Tianhe's core module about 17 m long and 4.2 m wide with two solar wings), not measurements: good to a factor of two or so, which is about a magnitude. Give your own, or a standard magnitude, to findPasses through its magnitudes option.

Import it

import { ESTIMATED_CROSS_SECTIONS } from "@johnmorrisdotca/chikyu-earth/passes";

Definition

const ESTIMATED_CROSS_SECTIONS: Readonly<Record<number, number>> = {
    25544: 2000,
    48274: 200,
    20580: 70,
}

Examples

import { ESTIMATED_CROSS_SECTIONS } from "@johnmorrisdotca/chikyu-earth/passes";

console.log(ESTIMATED_CROSS_SECTIONS[25544]);
2000

What it prints (run when this page was built)

View sourceEdit on GitHubMade from the source of @johnmorrisdotca/chikyu-earth 0.51.1.