© 2010 SRC

FOR OFFICIAL USE ONLY. Distribution limited to Department of Defense (DoD) and DoD Contractors ONLY. Exempt from Mandatory Disclosure under the FOIA. Exemption 3 Applies. Derived from Source: Security Classification Guide DARPA-CG-255

Revision 2, Dated: 15 Dec 2008, Declassify 7 June 2029

WARNING. EXPORT CONTROLLED DATA. This document contains Technical Data, the use of which is restricted by the U.S. Arms Export Control Act. It may not be transferred to any foreign person in the United States or abroad, except as authorized by the U.S. Department of State in accordance with International Traffic in Arms Regulations (ITAR). The data subject to this restriction are found on those pages marked with the following legend: “Export Controlled Data.”

UNCLASSIFIED//FOUO//EXPORT CONTROLLED DATA

FOPEN-GXP Kickoff Meeting

FORESTER System OverviewDoug Colclough, colclough@srcinc.com, 315-452-8329

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FORESTER Summary

Parameter ValueOperating Frequency UHF 420-450 MHzModes GMTI, SAR, AMTIDismount Detection Range (design goal at 20 kft AGL)

50 km open19 km single canopy11 km double canopy

Revisit Time 5 - 30 sAzimuth Accuracy (design goal)

0.5

Range Resolution 6 mSAR Resolution 5 x 6 mScan Coverage ± 45 electronic

± 180 mechanicalTransmit Power 10 kW peak

1 kW averagePrime Power 5 kWWeight 700 lbs

19 km single canopy11 km double canopy

20 kft17.5

30

Grazing angle limits FOPEN detection range

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Mode Summary

Mode CPI / Dwell Time (s)

Transmit Beam (deg)

Bandwidth (MHz) Description

Dismount GMTI 5 7 25 Standard mode for dismounts under foliage Typically 1-6 beams per scan

Dismount GMTI, 4:1 Spoil 5 24 25

4x instantaneous azimuth coverage 6 dB less SNR (SCR about same)

Tag GMTI 5 s Various Various Adds 32 ms FSK data message to beginning and end of each dwell

Vehicle GMTI 0.25-0.5 7 12.5 Optimized for higher speed targets Higher update rate than dismount mode

AMTI 0.25 7 3.125 Secondary mode to detect low flying

aircraft Designed for 100 km detection range

SAR N/A 7-24 25 Stripmap, 6 x 5 m resolution

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System Block Diagram

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Most of FORESTER electronics installed in A160 nose

Data recorder mounted in rear belly area

A160 Integration

Signal Processor Transmitter

Nose Fans

A160 Nose

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Rugged Data Recorders

New rugged units for Country 1 flight testing

RMMs can be removed and replaced via service panel on tail boom

Install time for rugged unit about 5 min per assembly

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Antenna is 18-channel linear array

Antenna is passive RF

Positioner system to rotate ±180 mechanically

Antenna

21 ft

Parameter Value

Frequency Range 420-450 MHz

Gain 19 dBi

Channels 16 active + 2 dummy elements

Beamwidth 7 azimuth, 60 el

Polarization Horizontal

Scan Coverage ± 45 electronic± 180 mechanical

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Transmitter• Solid-state, 16 channels• 625 W peak per channel• 5 – 100 s pulse width• 200 s minimum PRI• 10% maximum duty cycle• Frequency hopping waveform

with up to 8 subpulses

Receiver• 20 channels (16 main + 4

cal/aux)• Dual conversion to 15 MHz final

IF• 5 MHz instantaneous bandwidth• 14-bit A/Ds sampled at 20 MHz

Transmitter / Receiver

FR

EQ

UE

NC

YF

RE

QU

EN

CY

TIME

TIME

LINEAR SEQUENCE

PSEUDO-RANDOM SEQUENCE

SUB-PULSE PRI

BURST PRI

TOTALBANDSPAN

Frequency hopped waveform(normally use linear hop sequence)

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Processor uses 10 Virtex-II Pro FPGA boards and 2 SBC

Beamspace post-Doppler STAP for improved performance on the move

Data Recorder interface to record and play back A/D data

Signal Processor - Aircraft

Pulse Compress

& EQ

MotionComp Beamform Doppler

ConvProc

STAP/SARProc

QNXSBC

A/DData

STANAG 4607 GMTIDetections

LN251Nav Data

Data Recorder SAR Mode

SAR NITF

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Two sets of RDMs will be produced for FOPEN-GXP using post-processing of recorded A/D data• SRC radar emulation (conventional processing)• MITLL processing model (adaptive clutter cancellation)

Signal Processor – FOPEN-GXP

Pulse Compress

& EQ

MotionComp Beamform Doppler

ConvProc

AdaptiveProc

QNXSBC

A/DData

STANAG 4607 GMTIDetections

LN251Nav Data

Data Recorder SAR Mode

SAR NITF

SRC Radar EmulationRDMs

MITLLClutterCancelledRDMs

(MIT LL Processing)

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BLOS datalink bandwidth: 4.75 Mbps downlink

FORESTER budget: 1.5 Mbps

Includes 1.3 Mbps budget for future RD chips or other data

Assumes 750 kbps reduction from improved SRC software (in progress)

A160 Datalink Bandwidth

Max observed for dismount mode about 40 detections per second based on AP Hill and OCONUS flights

Assume 2.5X higher load for higher altitude and growth, so 100 per second

GMTI Dismount Detection LoadFORESTER Datalink Budget

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Portable terminal ground station shown from Ft. Stewart test

Includes computers for radar control and real-time GMTI analysis

Ground Station

Rugged computers in transit cases

Radar OPAnalysis

A160 HUDProjector

Radar OP Mission and Ground Command

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C1 TOC Configuration

Mission commander

GMTI analysts

FORESTEROperator

Color printer

Operations commander

Projector /EOIR Operator

NIPR

Scene Right (not pictured): Test Director, Weather, J-2

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Next generation FORESTER

Features• Reduced weight• More FPGA processing power• Full 30 MHz instantaneous bandwidth

Schedule• Full system hardware ready Feb 2011• Ready for flight testing Dec 2011

FORESTER V2