Objectives 1-6

Question 1

List the capabilities of 4th and 5th generation aircraft

Answer 1

4th Generation (1980-2000): Multimode pulse-doppler radar, DRFM jammers, active AAM, high-off boresight IR missiles

5th Generation (2000- ): AESA radar, integrated defensive avionics, long-wave IRSTS, thrust vector capability, weapons with cooperative engagement capability

Question 2

Describe the FSU models of radar control of fighters

Answer 2

FSU: Close Control

See Slide 15 for definition

Question 3

ID the key information from a launch acceptability region table

Define:
Rkin
F-pole
IR LAR key term

Answer 3

See slides 24 and 25 for examples of a LAR

Key terms:
Rkin - Missiles raw, kinematic range. Not limited by fire control or seeker acquisition capabilities.

F-pole - range between launcher and target at time of semiactive missile endgame/impact

See slide 25 for IR LAR key term

Question 4

Describe and/or illustrate the missile guidance schemes used by radar SAM systems: Active Guidance

Answer 4

A FC sensor establishes a track on a target, either with an EO/IR tracker or with a TTR. During the engagement A SEEKER ONBOARD THE MISSILE tracks the target.
-Still must use ground radar

Question 5

Describe radar SAM acquisition radar purpose and configuration

Answer 5

Purpose: to find the target aircraft using pointing data from C2 and IADS

Configuration:
Offboard acquisition radars: 
- Physically separated from TTR
- Target Info passed via data link, cable, and voice
- Local sensors allow for decentralized control
Onboard acquisition radars:
- Radars on same vehicle as TTR
- Allows autonomous operations

Question 6

Describe and/or illustrate the missile guidance schemes used by radar SAM systems: SAR homing** guidance

Answer 6

A FC sensor establishes a track on a target, either with an EO/IR tracker or with a TTR. When ready to fire, the target illuminator paints the target, typically with a CW illuminator. The SAR MISSILE HOMES IN ON THE ENERGY REFLECTED OFF THE TARGET.

Question 7

Describe and/or illustrate the missile guidance schemes used by radar SAM systems: Command Guidance

Answer 7

Command-guided missiles are steered to the target by commands transmitted from the ground-based FC system. The ground TTR tracks both the target and the missile. THE GROUND RADAR PROVIDES THE MISSILE STEERING COMMANDS.

Question 8

Describe and/or illustrate the missile guidance schemes used by radar SAM systems: Combined Guidance Schemes

Answer 8

Track via missile:
Combines Command and SAR guidance
Inertial Guidance:
Combines Command guidance and INS hardware

Question 9

For a LAR diagram, define:
Rmax1
Rmax2

Answer 9

Rmax1 - Maximum displayed missile employment range and the missiles maximum FC launch permit range (sometimes Rmax)
Rmax2 - Refers to heart of envelope shot that accounts for some evasive maneuvers by the target at endgame

Question 10

Describe Command to Line of Sight guidance law

Answer 10

Most inefficient guidance law. Think pure pursuit.

For crossing aircraft: missile drifts aft on canopy
For inbound/outbound aircraft: straighter flight path with less drift

Question 11

Describe half-rectified guidance law

Answer 11

Missile is guided to a point halfwat between the target position and predicted intercept point.
Poor mans pro-nav.

For a crossing target: missile drifts aft slowly on canopy.

Question 12

ID crossrange info when given a SAM engagement envelope diagram

Answer 12

See slides 63-66

Question 13

Describe Proportional Navigation

Answer 13

MOST EFFICIENT TRAJECTORY.

Missile appears steady on canopt to a nonmanuevering target aircraft.

IR SAMS, MANPADS, SARH and advanced command guided SAMS.