orbital mechanics
DESCRIPTION
Chapter 2TRANSCRIPT
EE-483 SPRING 2015SATELLITE COMMUNICATIONS
Lecture 2Orbital Aspects
Orbital Mechanics
2
Defining “Space”3
Is 100 miles (160 km) enough???4
Newton’s Laws of Motion5
Concept of Force6
Acceleration Inwards7
Acceleration Outwards8
Forces on a Satellite9
Balancing the Forces - 110
Example Circular Orbits11
Mean Earth radius is 6378.138 km and GEO radius from the center of the Earth is 42,164.17 km
Table 2.1 Orbital Velocity, Height, and Period of Four Satellite Systems
Orbit Limits12
Orbital Mechanics:Kepler’s Laws
13
Coordinate System 1 –Earth Main Planes
14
Coordinate System 2 –Orbital Plane Coordinate System
15
Developing Equations of the Orbit - 1
16
Developing Equations of the Orbit - 2
17
Kepler’s Three Laws18
Review of Ellipse Geometry19
Kepler’s First Law: Elliptical Orbits20
Orbit Characteristics21
Orbit Eccentricity22
Kepler’s Second Law: Equal Area Arcs
23
Kepler’s Third Law: Orbital Period24
Solar vs. Sidereal Day - 125
Solar vs. Sidereal Day - 226
Solar vs. Sidereal Day - 327
Solar vs. Sidereal Day - 428
Numerical Example 1: The GEO Orbit
29
Locating the Satellite in Orbit - 130
Locating the Satellite in Orbit - 231
Locating the Satellite in Orbit - 332
Orbit Description –1(Orbital Constants)
33
Orbit Description –2(Orbital Constants)
34
Orbit Description - 335
Locating Satellite with respect to Earth
36
Measuring Time37
Geocentric EquatorialCoordinates -1
38
Geocentric EquatorialCoordinates -2
39
Locating the Satellite -140
Defining Parameters -141
Defining Parameters -242
Locating the Satellite -243
Orbital Elements44
Numerical Example 2:45
Numerical Example 3:46