UCRGID-119535-5

Progress Reports for Period March 1-31,1995 Joint U W S Radar Program

R Kiefer J. Brae

D. Mantrom R Twogood

c. Rino D. Chambers H. Robey J. Belyea

April 24,1995

Thb ir an informal report intended primarily for internal or limited external dinhibution. The opinions and conclusions stated are those of the author and may or may not be those of the Laboratory.

Work performed under the auspices of the U.S. Department of Energy by the LPwrence Livermore National Labomtory under Contract W-7405-ENG48

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Progress Reports for period March 1-31,1995

Joint UK/US Radar Program 4/20/95

Organization: LLNL

Program: P.LLN.lO1O Airborne RAR/SAR

Principal Investigator: Rodney D. Kiefer

Current Ob iectives; Modify Hughes x-band radar for airborne implementation. Upgrade to polarimetry, high-power, and add SLAR mode. Deploy in UK/US field experiments as needed.

Recent accomplishments: The airborne (Hughes' A-3) test-bed system for future S A R and eventually, SLAR imaging at low grazing angles remains on schedule. The aircraft modification and FAA approval process is 99% complete. Hughes and LLNL continued work on system integration issues, radar hardware, and associated control hardware and software. The radar high-speed digital data interface board redesign effort is continuing. The overall radar and test-bed remains on schedule for radar hardware installation in late April followed by engineering system evaluations, calibrations and tests in May and June 1995. Homestead AFB and West Palm Beach International Airport were visited to assess possible aircraft staging options and issues for Projecf Overview. Initial discussions with Mike Yelverton regarding aircraft operational issues for Projecf Overview were also held.

Milestones for the reporting: period: No major milestones scheduled for March 95.

Exuected milestones for the ensuinv period April 1995' May 1995 Radar System Integration May - June 1995

Radar System Laboratory Demonstration

Engineering system evaluations, calibrations & tests

Other Issues; None

Planned exuenditures versus actuals: FY95 Budget Plan: $1500K March 95 costs: $128.5K Year-to-date costs: $429.9K

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Organization: LLNL

Program: P.LLN.1020 Radar Data Processor

Principal Investigator: James M. Brase

Current Ob iec tives; Integration and test of the real-time SAR processor for the Hughes airborne radar; define and develop the SAR Doppler and related analysis software for this unique system; develop the similar system for the UK testbed (ORB).

Recent accomplishments: Full speed reconstruction demonstrated on 8 processors. Integration befun with radar systems.

Milestones for the reporting period; Full speed demo was completed in March.

Exuected milestones for the ensuin? period; Lab demo with radar in April.

Other Issues; None.

Planned expe nditures versus actu als; FY95 Budget Plan: $750K March 95 costs: $41.6K Year-to-date costs: $378.4K

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Organization: LLNL

Program: P.LLN.1030 Ground-based SAR Signal Processing Workstation

Principal Investigator: ' James M. Brase

Current Ob jec t ives; Develop capabilities for motion compensation and autofocus for Hughes SAR and UK system. Enhance S A R processors with multi-look software. Analyze the low-grazing angle (LGA) processing steps and improve performance of LGA processing.

Recent acco mdishments; Integrated motion control into SAR processor. Work on 2D correlator underway. Full platform and target motion added to simulator.

.Milestones for the reuorting ueriod: Full resolution processor with motion compensation demonstrated.

Exuected milestones for the ensuing ueriod; First reconstruction of AETB full-resolution data in June (engineering flight data).

Other Issues; None.

Planned expenditures versus actuals:

Fy95 Budget Plan: $750K March 95 costs: W.5K Year-to-date costs: $214.5#

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Organization: LLNL

Program: P.LLN.1040 Static Airborne Radar

Principal Investigator: Rodney D. Kiefer

Current Ob iectiveg Procure GFE excess equipment including aerostafs, platforms, and ancillary systems. Perform checkout of hardware. Assess options for stabilized real- aperture radar experiments using these aerostats systems.

Recent accomplishments: The development of an operational aerostat capability is continuing on schedule. All old hardware was removed from three of the ground station enclosures recently received as excess GFE from McClellan AFB. The enclosures are being reconfigured for use as aerostat ground stations and support enclosures. The preliminary design for initial equipment location, rack & console needs and power distribution requirements has been done. The aerostat flight system hardware was inspected, powered-up and functionally tested with assistance from Martin-Marietta, under contract to LLNL. The land-based aerostat mooring platform reconfiguration design continues on schedule.

Milestones for the reporting period Aerostat flight system hardware inspected and functionality tested.

Exuected milestones for the ensuing: ueriod: April 1995 April 1995

Complete land-based mooring platform preliminary design. Complete mechanical & structural design review of land-based mooring platform preliminary design.

Other Issues: Funding for the Feb. 96 AUTEC test may be a problem - additional FY95 funds, not previously budgeted, are needed to make the long-lead time procurements.

Planned expenditures versus actuals; FY95 Budget Plan: $lOOOK March 95 costs: $145.8K Year-to-date costs: $343.2K

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Organization: LLNL

Program: P.LLN.1050 Multi-Aperture Space-Time Array Radar

Principal Investigator: James M. Brase

current Objectives; Perform feasibility study and preliminary design of a multi-aperture radar for high resolution, in both range and azimuth, imaging of the ocean surface.

m e nt acco mulishments; Project not scheduled to start until May 95.

Jblilestones for the reporting Deriod; None.

Exuected milestones for the ensuing period; Preliminary discussion with Keith Ward in May '95.

Other Issues: None.

planned erne nditures versus actuals: Fy95 Budget Plan: $200K March 95 costs: $0.6K Year-tedate costs: $0.6K

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Organization: LLNL

Program: P.LLN.1060 Radar Field Experiments

Principal Investigator: David Manfrom

Current Ob iec tives; Complete analysis of Loch Linnhe 1994 data. Plan and prepare for 1995 experiments.

Recent Accomulishments; Based on discussions in the UK w/o 13 February, program leaders recommended doing an experiment at AUTEC in July 95 with LLNL AETB and UK VLGA shipboard radar and US fleet asset. We are proceeding with planning for that experiment which has been given the name "Project Overview".

Planning with AUTEC and the UK continues in high gear. Dave Mantrom visited Mike Yelverton in early February and has been in frequent contact since. We have developed a test concept. A number of interchanges with DRA/Malvern have also taken place. ERIM "Quick Response" has been kept in the loop and are keeping their option open to participate.

A draft Test Description document for a summer AUTEC detection test was sent to AUTEC for the basis of securing fleet asset time. That process (involving a scheduling conference for fleet assets) has been completed, services have been secured, and our test will occur during the period 11-18 July. The Test Description document will be finalized soon and work on an Operations Plan document will begin.

No further developments on LLNL's participation in COPE.

Milestones for the reDortinP Deriod: Draft Test Description document written and sent to AUTEC. (Copy available upon request).

Exuected Milestones for the Ensuing Period; "Project Overview" Test Description document (final version)

"Project Overview" Operations Plan Draft

Report on shear effects on internal wave patterns

Other Issues:

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A meeting on 25 May has been scheduled at DRA/Malvern with UK, US test principals and AUTEC face-to-face whose purpose is to close all loops prior to the test.

Planned expe nditures vs: actual; Budget Plan: $2000K March 95 costs: $36.6K Year-to-date costs: $482.5

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Organization: LLNL

Program: P.LLN.1070 Data Analysis and Detection Theory

Principal Investigator: James M. Brase

current Obiectiveg Complete baseline analysis of Loch Linnhe data. Complete report on MTF for LGA data (1989-94 data sets). Continue Doppler analysis and detection implications. Analysis of UCSB data as it comes in.

Recent accomulishments: Doppler analysis of P3 and P4 94 runs completed. Received technical comments on LGA database study and modifications have been completed. Revisions made to UK assessment.

Milestones for the reuorting: period: First set of LL94 priority images completed. Final draft of LGA parametric study report completed; distribution underway.

Exuected milestones for the ensuing period; Analysis report for LL94 P I 4 will be distributed in April 95. Report on expected detection performance of AETB in June 95.

Other Issues: None.

Planned emenditures versus actuals: FY95 Budget Plan: $1100K March 95 costs: $149.OK Year-to-date costs: $856.6K

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Organization: LLNL

Program: P.LLN.1080 Management

Principal Investigator: Richard E. Twogood

Current Obiectives; Provide ongoing management oversight and support for the Joint UK/US Radar Program (Twogood) and staff support in Washington for the ASAP program office (Chocol), in addition to other consultant and management services (Wells, Manasse, etc.). All administrative support for UK/US program included.

Recent accomplishments: All management functions for the UK/US Radar Program, plus the related functions and contract management, were successfully performed.

Milestones for the reuorting period; Quarterly review of UK/US program conducted. LLNL hosted planning meeting in preparation for Scientific Advisory Group briefings; SAG was briefed on 2/23/95.

Exuected milestones for the ensuing period: Ongoing support to ISSO office by program office staff. Quarterly project meeting scheduled at LLNL 2/7-8/95. Coordination and briefing for Scientific Advisory Group in February 95.

Other Issues: None.

Planned emenditures versus actuals: FY95 Budget Plan: $1100K March 95 costs: $239.7K Year-to-date costs: $1571.9K (includes accruals of overruns from FY94,

approximately $550K to date; this o v e m is covered by Fy94 funds previously sent to LLNL; also includes expenses not originally budgeted but now supported; via Wells et al.)

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Organization: LLNL

P.LLN.1090 E-2C Radar Data Analysis Program:

Principal Investigator: Charles Rino

Inputs to be provided separately to ISSO directly by Vista Research.

Planned erne nditures versus actua Is; FY95 Budget Plan: $lOOK March 95 costs: $5K (estim.) Year-to-date costs: $lOOK (estim.)

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Organization: LLNL

Program: P . L L N & l Modeling and Analysis (LLNL)

Principal Investigator: David Chambers

Current Ob iectives; Analysis of Loch Linnhe 1994 hydrodynamics data. Development of turbulent wake model. Estimate wind-wave relaxation times.

Recent accomplishments: Continued analysis of Loch Linnhe hydro data. Continued comparison of wake model to IAP tank data.

Milestones for the reuortinPr ueriod; Completed rough draft of Loch Linnhe CMA data report. Completed analysis of IAP data for hull effect.

Exuected milestones for the ensuinq period: Final draft of LL94 CMA report.

Other Issues: None.

Planned erne nditures versus actua 1s; W95 Budget Plan: $330K March 95 costs: $23.5K Year-to-date costs: $109.8K

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LLNL Organization:

Program: P.LLN.1150 Modeling and Analysis (Vista)

Inputs to be provided to ISSO directly by Vista Research.

Planned expenditures versus actuals: FY95 Budget Plan: $135K

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Organization: LLNL

Program: P.LLN.1160 Vista Research

Inputs to be provided to ISSO directly by Vista Research.

Planned expenditures - versus actuals: FY95 Budget Plan: $135K

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Organization: LLNL

Program: P.LLN.1170 Current Meter Array

Principal Investigator: David Mantrorn

Current Objectives: Loch Linnhe 1994 CMA data analysis and documentation. Upgrades to power system, structure, and data acquisition for future tests.

Rece nt acco mplishmen ts; Dave Chambers presented his approach to estimating Modulation Transfer Function (MTF) from simultaneous CMA and radar data at the 2/7 Joint UK/US Program review at LLNL. We have continued our analysis of LL94 CMA data. We are making a direct effort to understand why ship-generated Iw's were seen by the CMA in some records and not in others. We are looking at operating and environmental effects on Tw generation and ambient noise levels.

Preliminary results from applying a second noise rejection algorithm to the ship wake data show some promise. This is a model-based approach developed by Jim Candy of LLNL.

We have identified upgrades to the CMA but whether we will do them is pending whether or not the CMA will participate in the July AUTEC experiment.

Milestones for the reporting period: "Near-surface Current Meter Array Measurements of Internal Gravity Waves" by Mantrom, Jones, and Chambers presented at Fifth IEEE Working Conference on Current Measurement, St. Petersburg, 7-9 February 1995.

Emected milestones for the ensuinc period; Completion of data analysis with noise rejection algorithm #2. Go/nogo decision on CMA involvement in AUTEC experiment.

Other Issues: None.

Planned expenditures versus actuals: M95 Budget Plan: $300K March 95 costs: $15.7K Year-to-date costs: $75.7K

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Organization: LLNL

Program: P.LLN.1410 UCSB Wave Tank

Principal Investigator: Harry Robey

Cume nt Ob iectives; Continue hydro measurements program at UCSB. Install radars in tank initially UCSB's C-band and LLNL's existing wideband; later TRWs x-band. Conduct radar LGA experiments with simultaneous optical and hydro systems. Analyze and report on wave tank results.

Pete nt acco mdishments; Wind tunnel construction now 85% complete. Keith Ward visited OEL during the week of March 19 to work on

experiment planning and attend the first RTC meeting. The first RTC meeting was held March 23. Plans for cooperation on

calibration and radar mounts between, UCSB, TRW and LTNL were agreed upon. A preliminary experiment schedule was also set. UCSB 6 GHz radar was successfully upgraded to wimultaneous HH/VV

operation; the same upgrade for the LLNL 2 GHz radar is underway.

Milestones for the reuort inP ueriod; UCSB funding increment in place. Radar test committee meeting held. UCSB radar upgrade complete.

Emected milestones for the ensuing Deriod; Wind tunnel completion 4/95 TRW radar tests 4/95 Facility calibration 5/95 Initial reports on breaking wave experiments 5/95

Other Issues; None.

Planned expe nditures versus actuals; FY95 Budget Plan: @00K March 95 costs: $27.5K Year-to-date costs: $228.6K

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Organization : LLNL

Program: P.LLN.1420 Stratified Flow Facilities

Principal Investigators: Harry Robey

Current Objectives:

We have designed and are presently constructing a small, inexpensive (less than $20K) stratified towing tank to be utilized at LLNL for multiple purposes. The tank, whose dimensions are 1 meter deep by 3 meters wide by 5 meters long, will be stratified using the same method as is used in the large thermo- stratified tank at LAP, Nizhniy Novgorod.

There are several reasons for building a new tank at this time. First, the results obtained at IAP demonstrate that simple objects such as towed spheres generate very large magnitude internal waves from their wakes which are presently not predicted by any numerical codes. We would naturdly like to extend these results to ellipsoidal bodies and then to self-propelled bodies. While both of these experiments are still unclassified, we would much prefer to do them at LLNL than in Russia.

Recent Accomplishments:

The heat exchangers have been delivered. The tank will be completed this month, with delivery scheduled for the third week of April. A simple model towing system has been designed, parts have been fabricated, and are currently being assembled. Work on the data acquisition (using an existing system) from an array of thermocouples has been completed.

Milestones for the reporting period:

The heat exchangers have been delivered. The tank will be completed this month, with delivery scheduled for the third week of April.

Expected Milestones for the ensuing period:

The tank should be operational by the end of April, and a characterization of the tank stratification will begin.

Other Issues:

None.

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Planned expenditures versus actuals; FY95 Budget Plan: $200K March 95 costs: $50.2K Year-to-date costs: $174.9K

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Organization : LLNL

Program: P.LLN.1430 Institute of Applied Physics, Russia

Principal Investigators: Harry Robey

Current Objectives:

Conduct wave tank studies in the thermally stratified tank at IAP, Russia. Current emphasis is on a continuation of experiments on internal wave generation by a towed body and its turbulent wake. Also, previous results will be extended to include the effects of shear.

Recent Accomplishments:

Phase one of the experiments has been completed. The results are documented in the 4th report from IAP, which was received this month. A copy is included with this month's progress report.

The experiments extended the results obtained earlier to a larger range of Froude and Reynolds number. Froude numbers cover the range 0.4 e Fr=U/ND < 75, and Reynolds numbers cover the range 3500 < Re=UD/n

Other Issues:

Report available: Task Order No. 297397 "Internal Wave Measurements in IAP Large Thermostratified Tank" Part 4 - Study of Internal Waves Generated by a Moving Body. Institute of Applied Physics; Russian Academy of Sciences, Nizhny Novgorod, Russia 1995

Planned erne nditures versus actuals; FY95 Budget Plan: $350K March 95 costs: $OK Year-to-date costs: $OK (contract liened however but costing is

greatly delayed with Russian contracts)

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Organization: LLNL

Program: P.LLN.1210 IR Sensor Systems

Principal Investigator: Jerry Belyea

Inputs to be provided to ISSO directly by ERIM.

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Budget Status

Budget breakdown by individual ISSO work assignment are described in the above individual work unit assignments. Overall LLNL funding status is as follows (includes all LLNL costs, including all work units in this report).

March 95 costs: $1582.7K Year-to-date costs: $6253.2K * Ledger liens: $3218.8K Pre-liens: $ 523.9K Non-ledger liens: $600K (est.) (unaccrued costs on liens and

preliens plus at-risk funding by contractors)

$2650.2K Funds remaining:

Discussion of funding: ISSO sent a $1.9M MIPR in March which is included in the above. An additional $1.4M (estimated) is expected to be sent by ISSO in March, bringing all tasks covered by this report to full FY95 (includes IR work at ERIM only through April 95, however).

* Note: This number includes all costs at LLNL, i.e. this includes costs accrued not only for the UK/US budgets reported in this document, but also ERIM's IR support, Vista's E-~c, plus accruals of charges from previous years that costed after 10/1/94 and are therefore not included in any FY95 work unit assignment.

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