PC 4 Study Guide Flashcards
What is the act of maneuvering a satellite into and within the relative vicinity of another?
Rendezvous and Proximity Operations (RPO)
A satellite around which an RPO occurs is called a what?
Resident Space Object (RSO)
What RSO actively assists the RPO?
Cooperative
What RSO does not actively assist or hinder the RPO?
Non-cooperative
What RSO actively hinders the RPO?
Un-cooperative
What is the direction and distance where a satellite payload may function?
Payload Engagement Zone (PEZ)
The direction and distance where a satellite weapon may function is called what?
Weapon Engagement Zone (WEZ)
The preferred reference frame for RPOs is what?
RIC reference frame
A difference in semi major axis will cause what?
Permanent in track drift
A difference in what will produce a 2x1 in-plane ellipse?
Eccentricity
A difference in what COEs will produce motion along a drifting 2x1 in-plane ellipse?
- Eccentricity
- Semi-major axis
A difference in inclination and/or RAAN will produce what?
An oscillating cross-track/out of plane motion
How is helical motion produced?
A difference in semi-major axis, eccentricity, and inclination
Small radial burns will change what?
Eccentricity
Small in-track burns will change what?
- Eccentricity
- Semi-major axis
Small cross track burns will change what?
- Inclination
- RAAN
The path a satellite would take if it did not maneuver is known as what?
Free-flight trajectory
What between waypoints will have a significant impact on the free-flight trajectory?
Time of flight
When conducting RPOs,
Tactics, Techniques, and Procedures (TTPs) are created with what considerations?
- Safety
- Efficiency
- Time
Perch occurs when all COEs match except what?
True Anomaly
What occurs when two satellites are on circular orbits with different semi-major axis?
Linear Drift
Natural Motion Circumnavigation is what?
When two satellites have the same semi-major axis but different eccentricities.
The period to go around Natural Motion Circumnavigation (NMC) is the same as the period of the what?
Resident Space Object (RSO)
The time-of-flight of a v-bar hop is what?
Half the RSO’s period
What allows the chaser satellite to remain above or below the RSO for extended periods of time?
Dynamic Stationkeeping
R-Bar hops allows the chaser to ingress along what?
The radial axis
During a R-Bar hop, if a burn is missed, what will happen to the chaser?
It will drift away from the RSO
What is the placement of waypoints around the RSO to “force” the motion into the desired path with constant range at each waypoint?
Forced Motion Navigation
Make sure you study the ECI/Perifocal and RIC burns.
- Radial
- In-Track
- Cross-Track
