PC 4 Study Guide

Question 1

What is the act of maneuvering a satellite into and within the relative vicinity of another?

Answer 1

Rendezvous and Proximity Operations (RPO)

Question 2

A satellite around which an RPO occurs is called a what?

Answer 2

Resident Space Object (RSO)

Question 3

What RSO actively assists the RPO?

Answer 3

Cooperative

Question 4

What RSO does not actively assist or hinder the RPO?

Answer 4

Non-cooperative

Question 5

What RSO actively hinders the RPO?

Answer 5

Un-cooperative

Question 6

What is the direction and distance where a satellite payload may function?

Answer 6

Payload Engagement Zone (PEZ)

Question 7

The direction and distance where a satellite weapon may function is called what?

Answer 7

Weapon Engagement Zone (WEZ)

Question 8

The preferred reference frame for RPOs is what?

Answer 8

RIC reference frame

Question 9

A difference in semi major axis will cause what?

Answer 9

Permanent in track drift

Question 10

A difference in what will produce a 2x1 in-plane ellipse?

Answer 10

Eccentricity

Question 11

A difference in what COEs will produce motion along a drifting 2x1 in-plane ellipse?

Answer 11

• Eccentricity
• Semi-major axis

Question 12

A difference in inclination and/or RAAN will produce what?

Answer 12

An oscillating cross-track/out of plane motion

Question 13

How is helical motion produced?

Answer 13

A difference in semi-major axis, eccentricity, and inclination

Question 14

Small radial burns will change what?

Answer 14

Eccentricity

Question 15

Small in-track burns will change what?

Answer 15

• Eccentricity
• Semi-major axis

Question 16

Small cross track burns will change what?

Answer 16

• Inclination
• RAAN

Question 17

The path a satellite would take if it did not maneuver is known as what?

Answer 17

Free-flight trajectory

Question 18

What between waypoints will have a significant impact on the free-flight trajectory?

Answer 18

Time of flight

Question 19

When conducting RPOs,
Tactics, Techniques, and Procedures (TTPs) are created with what considerations?

Answer 19

• Safety
• Efficiency
• Time

Question 20

Perch occurs when all COEs match except what?

Answer 20

True Anomaly

Question 21

What occurs when two satellites are on circular orbits with different semi-major axis?

Answer 21

Linear Drift

Question 22

Natural Motion Circumnavigation is what?

Answer 22

When two satellites have the same semi-major axis but different eccentricities.

Question 23

The period to go around Natural Motion Circumnavigation (NMC) is the same as the period of the what?

Answer 23

Resident Space Object (RSO)

Question 24

The time-of-flight of a v-bar hop is what?

Answer 24

Half the RSO’s period

Question 25

What allows the chaser satellite to remain above or below the RSO for extended periods of time?

Answer 25

Dynamic Stationkeeping

Question 26

R-Bar hops allows the chaser to ingress along what?

Answer 26

The radial axis

Question 27

During a R-Bar hop, if a burn is missed, what will happen to the chaser?

Answer 27

It will drift away from the RSO

Question 28

What is the placement of waypoints around the RSO to “force” the motion into the desired path with constant range at each waypoint?

Answer 28

Forced Motion Navigation

Question 29

Make sure you study the ECI/Perifocal and RIC burns.

Answer 29

• Radial
• In-Track
• Cross-Track