What are ground tracks What are ground tracks

What are ground tracks?

What are ground tracks?

COE Determination

COE Determination a e i ? ? ?

Non-rotating Earth

Rotating Earth

COE Determination ΔN Δ longitude P= Semimajor axis ΔN 15º / hr

COE Determination a e i ? ? ?

COE Determination Circle Eccentricity

COE Determination Eccentricity

COE Determination Line Symmetry Ellipse Eccentricity

COE Determination Line Symmetry Ellipse Eccentricity

COE Determination Line Symmetry Ellipse Eccentricity

COE Determination Line Symmetry Ellipse Eccentricity

COE Determination Line Symmetry Ellipse Eccentricity

COE Determination Line Symmetry Ellipse Eccentricity

COE Determination Line Symmetry Ellipse Eccentricity

COE Determination Eccentricity

COE Determination Hinge Symmetry Ellipse Eccentricity

COE Determination Hinge Symmetry Ellipse Eccentricity

COE Determination Hinge Symmetry Ellipse Eccentricity

COE Determination Hinge Symmetry Ellipse Eccentricity

COE Determination Hinge Symmetry Ellipse Eccentricity

COE Determination Hinge Symmetry Ellipse Eccentricity

COE Determination Eccentricity

COE Determination Line & Hinge Circle Eccentricity

COE Determination Neither Ellipse Eccentricity

COE Determination Eccentricity

COE Determination a ~e i ? ?

COE Determination i = highest latitude Inclination

COE Determination i = 180º - highest latitude Inclination

COE Determination i = highest latitude Inclination

COE Determination i = 180º - highest latitude Inclination

COE Determination a ~e i ? ? ?

COE Determination a ~e i ? ?

COE Determination Argument of Perigee

COE Determination 360º per orbit 90º 180º 360º Ascending Node 270º Argument of Perigee

Hinge Symmetric Line Symmetric w = 0° Perigee w = 90° w = 270° Perigee w = 180°

COE Determination ω = 180º Argument of Perigee

COE Determination ω = 90º Argument of Perigee

COE Determination ω = 0º Argument of Perigee

COE Determination ω = 270º Argument of Perigee

COE Determination Hinge Symmetry ω = 0º or 180º Argument of Perigee

COE Determination Line Symmetry ω = 90º or 270º Argument of Perigee

COE Determination a ~e i ~ ?

COE Determination True Anomaly

COE Determination True Anomaly

COE Determination True Anomaly

Orbit Examples

Molniya

Geostationary

Geosynchronous

Geosynchronous e = 0. 0 e = 0. 8 w = 180° e = 0. 8 w = 0°

Geosynchronous e=0 i = 0° e = 0. 4 w = 180° e = 0. 6 w = 90°