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© 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
22SEP2010 UNCLASSIFIED//FOUO//EXPORT CONTROLLED DATA 2
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
22SEP2010 UNCLASSIFIED//FOUO//EXPORT CONTROLLED DATA 3
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
22SEP2010 UNCLASSIFIED//FOUO//EXPORT CONTROLLED DATA 4
System Block Diagram
22SEP2010 UNCLASSIFIED//FOUO//EXPORT CONTROLLED DATA 5
Most of FORESTER electronics installed in A160 nose
Data recorder mounted in rear belly area
A160 Integration
Signal Processor Transmitter
Nose Fans
A160 Nose
22SEP2010 UNCLASSIFIED / FOUO / EXPORT CONTROLLED DATA 6
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
22SEP2010 UNCLASSIFIED//FOUO//EXPORT CONTROLLED DATA 7
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
22SEP2010 UNCLASSIFIED//FOUO//EXPORT CONTROLLED DATA 8
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)
22SEP2010 UNCLASSIFIED//FOUO//EXPORT CONTROLLED DATA 9
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
22SEP2010 UNCLASSIFIED//FOUO//EXPORT CONTROLLED DATA 10
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)
22SEP2010 UNCLASSIFIED//FOUO//EXPORT CONTROLLED DATA 11
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
22SEP2010 UNCLASSIFIED//FOUO//EXPORT CONTROLLED DATA 12
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
22SEP2010 UNCLASSIFIED / FOUO / EXPORT CONTROLLED DATA 13
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
22SEP2010 UNCLASSIFIED//FOUO//EXPORT CONTROLLED DATA 14
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
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