Radar

Question 1

Purpose

Answer 1

The purpose of the Radar Suite is to detect and track surface and air targets at short, medium, and long range IOT allow sufficient time to react against above water threats and to contribute to the recongized maritime picture.

Question 2

SMART-S

Answer 2

Signal Multibeam Acquisition Radar for Tracking S Band

3D S-Band volume search radar.

Performs automatic detection, location, and tracking of air and surface targets.

Frequency: 2.9 - 3.2 GHz S-Band.
Max Range: 135 nm
Tracks: 400 air, 100 surface
Power: 1.2 kW per T/R Book, total 19.2 kW

Question 3

SMART-S Antenna

Answer 3

Contains:

16 linear arrays - transmit and recieve, electronic stabilization.
16 T/R Books - amplify incoming and outgoing RF
4 Multi-channel Recievers - filtering and digital conversion
1 Radar Signal Generator (RSG) - generates low power RF energy

Located on the Bridge Top.

Question 4

Signal Processsing Cabinet

Answer 4

Controls SMART-S radar system.
Signal and data processing.

Generates tracks.

Interfaces with CMS through VSU pass-thru connection

Recieves NDDS feed,.

Hits generated by Signal Processing Unit (SPU)

Tracks generated by Digital Processing Unit (DPU)

Located in RR2

Question 5

DCCC

Answer 5

Drive Control and Cooling Cabinet

Drive Control Unit controls rotation speed of SMART-S Antenna.

Cooling Unit contains internal closed loop refrigeration to cool SS amplifiers and processing equipment.

Recieves Chilled Water supply.

Located in RR2

Question 6

SG-180

Answer 6

Saab Sea Girrafe 180 Hybrid Radar

Medium Range C-Band air and surface search radar.

Frequency: 5.45 - 5.85 GHz C-Band
Maximum Range: 100 nm
Tracks: 200 air, 500 surface
Power: 60 kW to TWT, 10 W to SS Amps

Question 7

SG-180 Antenna

Answer 7

Offset reflector with three feed horns and slotted waveguide radiator.

Mechanically stabilized.

Located on the Main Mast

Question 8

Platform Control Cabinet

Answer 8

Controls the stabilization of the antenna platform.
Controls the rotation of the antenna.
Recieves NDDS feed via RICS.

Located in RR1.

Question 9

Transciever Unit

Answer 9

Contains components for transmitting and recieving radar pulses.

TWT - 60 kW
SS amps - 10 kW
Reciever - filters and digitizes

Located in RR1

Question 10

Signal and Data Unit

Answer 10

Controls the SG-180 radar system.

Creates tracks and communicates with CMS 330.

Located in RR1

Question 11

Cooling Cabinet

Answer 11

Contains internal closed refrigeration loop to cool TWT.
Interfaces with Chilled Water.
Provides dry air to cabinets in RR1.

Located in RR1

Question 12

X & S Band Navigation Radars

Answer 12

Facilitate safe navigation of the ship.

Frequencies:
X-Band: 9.41 GHz
S-Band: 3.05 GHz

Range: 0.125 - 24 nm
Tracks: 40 Manual, 40 Automatic
Power: X-Band: 25 kW
S-Band: 30 kW

Question 13

X and S band antennas

Answer 13

Use a non-slip belt to rotate antennas.
Contain the Performance Monitoring Unit which provides transmitter power check and reciever sensitivity check.

X Band located on Mast.
S band located on Bridge Top.

Question 14

MTR

Answer 14

Modulated Transmitter Reciever

Generate RF signals.
Transmit commands from consoles to transciever.

Use a magnetron type amplifier.

X-Band uses RF Waveguide
S-Band uses Coax cable

X-Band MTR located in the ECM
S-Band MTR located in FCER 1

Question 15

ISU

Answer 15

Interswitching Unit

Allows radar consoles to select which radar’s information is displayed on their screen.

Galvonic connection ensure the primary display of each radar will still recieve its associate radar data.

Located in ECM.

Question 16

Navigatin Radar Consoles

Answer 16

Human Machine Interfaces.

COTS computer processes operator input and displays radar data.

Located on the bridge.

Question 17

IFF

Answer 17

Military and civilian identification system.

Frequencies:
Interrogate: 1030 MHz
Reply: 1090 MHz

Range: 256 nm
>2000 targets per scan
Power: 4 kW SS Amps

Question 18

IFF Interrogators

Answer 18

Provide IFF interrogation and processes replies.

Co-located on SMART-S and SG-180 antennas.

Question 19

IFF Transponders

Answer 19

Recieve interrogations and transmit own ship identification.

Two omni-directional antennas located on the Mast.

Question 20

M/ISC

Answer 20

Mission/IFF System Computer

Controls the transponder
Interfaces with CMS

Located in RR2

Question 21

Modes of Operation (List)

Answer 21

CMS:
AIAT
AICAT
MIAT

SMART-S:
Air: Surveillance, Defense
Su: Ducting, No Ducting

SG-180:
Long Range Sea Skimmer
Medium Range Electronic Counter Measures
Surface High Resolution High Update Rate

IFF:
Mode 1
Mode 2
Modes 3-A and C
Modes 4 and 5
Mode S

Question 22

CMS Modes

Answer 22

AIAT: Tracks automatically initiated and created.
AICAT: Tracks automatically iniated, must be confirmed to create track.
MIAT: Tracks manually created, then automatically tracked.

Question 23

SMART-S Modes

Answer 23

Air:
Defense Mode: 85 nm, 27 rpm
Surveillance Mode: 135 nm, 13.5 rpm

Su:
Ducting: 45 nm
No Ducting: 22 nm

Question 24

SG-180 Modes

Answer 24

LRSS: 100 nm (Air), 32 nm (Su), 60 rpm
MRECM: 50 nm, 30 rpm
SHRHUR: 16 nm, 60 rpm

Question 25

IFF Modes

Answer 25

Mode 1: Legacy air traffic - aircraft type
Mode 2: Legacy air traffic - tail number
Modes 3-A and C: “Squawk” - Aircraft number and elevation in hundreds of feet.
Modes 4 and 5: Military only encrypted. Mode 5 is lethal interrogation.
Mode S: Global IFF for military and civilian, includes ID and flight path.

Question 26

Operational Description

Answer 26

CMS
SPC
RSG
T/R Books
Phased arrays
Medium
Contact
Medium
Phased Arrays
T/R Books
Multi Channel Recievers
SPU
SDU
CMS

Question 27

System Interfaces

Answer 27

EPG&D
CMS
NDDS
HVAC
SLA-10B
Chilled Water

Question 28

Redundancy and Survivability

Answer 28

Nav radars each have their own display.

Galvonic connection in ISU.

Overlapping coverage.

T/R book graceful degradation.

SMART-S and SG-180 have ECM capabiliies such as hamming detection, frequency hopping, PRF stagger.

Two IFF interrogator units and transponder antennas.

Cabinets shock mounted and geographicallty dispersed.