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//
// This program illustrates how to use the OrbitTools Track Library
// to determine the LAT/LON ground track of a satellite.
//
// Copyright © 2012 Michael F. Henry
// 2012-02-13
//
using
System;
using
System.Collections.Generic;
using
Zeptomoby.OrbitTools;
using
Zeptomoby.OrbitTools.Track;
namespace
TrackExample2
{
class
Program
{
static
void
Main(string[]
args)
{
// Create the Tle object,
and the corresponding Orbit object
Tle
tle = new
Tle(
"GPS BIIF-2 (PRN 01)",
"1 37753U 11036A
12043.26600496 .00000050 00000-0 00000+0 0 1793",
"2 37753 55.0122 178.4391
0003903 34.9135 325.0832 2.00565114 4219");
Orbit orbit =
new
Orbit(tle,
new
Wgs84());
// The times t1 and t2 are
the start/stop times of the ground track.
DateTime
t1 = new
DateTime(2012,
02, 14, 1, 30, 0);
// UTC: 2012-02-14 01:30
DateTime
t2 = t1 + orbit.Period;
// There are several overloads of the GroundTrack() method, to allow:
// - Specifying times with
DateTime objects;
// - Specifying times with
minutes-past-epoch values;
// - Obtaining LAT/LON points
that are equally-spaced in distance;
// - Obtaining LAT/LON points
that are equally-spaced in time.
// In this example a list of
ground track points are created for the
// time window t1..t2 with a
distance spacing of 100 kilometers.
IList<CoordGeo>
points = orbit.GroundTrack(t1, t2, 100.0);
Console.WriteLine("Total
number of ground track points: {0}",
points.Count);
foreach
(CoordGeo
pt in
points)
{
double
lat = Globals.Rad2Deg(pt.Latitude);
// negative
values = south
double
lon = Globals.Rad2Deg(pt.Longitude);
// negative
values = west
Console.WriteLine("{0:F3},
{1:F3}",
lat, lon);
}
// Program output:
//
// Total number of ground track points: 309
// -29.767, 215.922
// -30.633, 216.230
// -31.489, 216.553
// -32.341, 216.892
// -33.188, 217.250
// ( output truncated... )
// -26.768, 34.984
// -27.639, 35.239
// -28.507, 35.507
// -29.372, 35.790
// -29.776, 35.928
//
}
}
} |
