Radar Flashcards
Purpose
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.
SMART-S
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
SMART-S Antenna
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.
Signal Processsing Cabinet
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
DCCC
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
SG-180
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
SG-180 Antenna
Offset reflector with three feed horns and slotted waveguide radiator.
Mechanically stabilized.
Located on the Main Mast
Platform Control Cabinet
Controls the stabilization of the antenna platform.
Controls the rotation of the antenna.
Recieves NDDS feed via RICS.
Located in RR1.
Transciever Unit
Contains components for transmitting and recieving radar pulses.
TWT - 60 kW
SS amps - 10 kW
Reciever - filters and digitizes
Located in RR1
Signal and Data Unit
Controls the SG-180 radar system.
Creates tracks and communicates with CMS 330.
Located in RR1
Cooling Cabinet
Contains internal closed refrigeration loop to cool TWT.
Interfaces with Chilled Water.
Provides dry air to cabinets in RR1.
Located in RR1
X & S Band Navigation Radars
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
X and S band antennas
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.
MTR
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
ISU
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.
Navigatin Radar Consoles
Human Machine Interfaces.
COTS computer processes operator input and displays radar data.
Located on the bridge.
IFF
Military and civilian identification system.
Frequencies:
Interrogate: 1030 MHz
Reply: 1090 MHz
Range: 256 nm
>2000 targets per scan
Power: 4 kW SS Amps
IFF Interrogators
Provide IFF interrogation and processes replies.
Co-located on SMART-S and SG-180 antennas.
IFF Transponders
Recieve interrogations and transmit own ship identification.
Two omni-directional antennas located on the Mast.
M/ISC
Mission/IFF System Computer
Controls the transponder
Interfaces with CMS
Located in RR2
Modes of Operation (List)
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
CMS Modes
AIAT: Tracks automatically initiated and created.
AICAT: Tracks automatically iniated, must be confirmed to create track.
MIAT: Tracks manually created, then automatically tracked.
SMART-S Modes
Air:
Defense Mode: 85 nm, 27 rpm
Surveillance Mode: 135 nm, 13.5 rpm
Su:
Ducting: 45 nm
No Ducting: 22 nm
SG-180 Modes
LRSS: 100 nm (Air), 32 nm (Su), 60 rpm
MRECM: 50 nm, 30 rpm
SHRHUR: 16 nm, 60 rpm
IFF Modes
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.
Operational Description
CMS
SPC
RSG
T/R Books
Phased arrays
Medium
Contact
Medium
Phased Arrays
T/R Books
Multi Channel Recievers
SPU
SDU
CMS
System Interfaces
EPG&D
CMS
NDDS
HVAC
SLA-10B
Chilled Water
Redundancy and Survivability
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.
