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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

STANDARD_MAGNITUDESconstant

The standard magnitudes this package assumes for the satellites in ESTIMATED_CROSS_SECTIONS (standardMagnitude of each, with the default albedo). They are estimates, and a satellite's real brightness changes with how it is turned, so a magnitude worked out from them is good to a magnitude or two. Pass your own to findPasses through its magnitudes option.

Import it

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

Definition

const STANDARD_MAGNITUDES: Readonly<Record<number, number>> = Object.fromEntries(Object.entries(ESTIMATED_CROSS_SECTIONS).map(([id, area]) => [Number(id), standardMagnitude(area)]))

Examples

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

console.log(STANDARD_MAGNITUDES[25544]?.toFixed(1));
-0.8

What it prints (run when this page was built)

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