PC 3 Study Guide Flashcards
What is the movement of a satellite due to changing mission requirements?
Station Changing
What are small maneuvers that may be needed at regular intervals to keep a satellite in its desired position?
Station Keeping
What orbit is used by maneuvering a satellite to an unused orbit where it will not affect other satellites at end of life?
Disposal Orbit
Maneuvering a satellite to re-enter the atmosphere and burn up is called what?
De-Orbit
What maneuvers will speed up or slow down the satellite, altering the semi-major axis and eccentricity of the orbit?
In-Track
A radial maneuver will change what COEs of an orbit?
- Argument of Perigee
- Eccentricity
What maneuvers alter the inclination and RAAN of an orbit?
Cross-Track
Hohmann transfers require how many in-track maneuver(s) to move from one circular orbit to another circular orbit?
2
A maneuver that can change a satellite’s inclination or RAAN without changing the semi-major axis, eccentricity, or argument of perigee is known as what?
Simple Plane Change
What occurs during the second burn of a Hohmann transfer, usually at the apogee of the transfer orbit?
Combined Plane Change
In order to complete a rendezvous, what two variables must be known?
- Burn
- Timing
What is the difference in mean motion, used to describe how quickly two satellites are moving relative to each other?
Drift Rate
What rendezvous would be used for two satellites in the same orbit, but with different true anomalies?
Co-Orbital
A co-orbital chaser satellite is behind a RSO along their velocity vector must fire what kind of in-track burn in order to catch up to the RSO?
Negative
A phasing orbit can be used to alter what between two satellites?
Angular Distance
A co-orbital chaser satellite is ahead a RSO along their velocity vector must fire what kind of in-track burn in order to catch up to the RSO?
Positive
To conduct a co-planar rendezvous, two satellites must have the same what?
Inclination and RAAN
Note: And a different semi major axis
The most fuel-efficient method to get from one orbit to the other during a co-planar rendezvous would be what?
Hohmann Transfer
What rendezvous is required when the RSO or final orbital slot is on a different plane?
Plane-Matching
2 Part Question
When conducting a Plane-Matching Rendezvous, what fuel is used when the spacecraft is going slower, usually at where of a transfer orbit?
- Less
- Apogee
