mission analysis aspects for earth observations missions

True anomaly:The location of a spacecraft in a orbitManoeuvres (1)– For a given gravitational field, the orbital movement of a spacecraft is fullydefined by 6 parameters:– 5 GEOMETRIC ONES FOR DEFINING THE ORBIT– + 1 DYNAMIC FOR DEFINING THE POSITION ON THE ORBITOr, equivalently, by any set of 6 independent parameters, such as ...– THE 3 PARAMETERS DEFINING THE SPACECRAFT POSITION AT A GIVEN TIME– THE 3 PARAMETERS DEFINING THE SPACECRAFT VELOCITY AT THE SAME TIME– Thus, at a given time/position, a propulsive manouvre modifying thespacecraft velocity (in module and direction), also changes is orbit