Timothy_J_Cash_Career_Portfolio_Rev_6

Timothy J Cash

Career Portfolio

The early years 1980-1998

• NASA: HP41C Calculator flight units first Space Shuttle missions.

• Sony 8 mm Camcorder: Nighttime Daytime Orbital Survey of Lightning

• Trace Gas Analyzer: Spacelab Gas Chromatograph/Mass Spectrometer

• Mark Products/Custom Cable: Cable Design Engineer

• First optical fiber land seismic cable, harsh environment undersea cables

• Litton Resource Systems: Coaxial cable: Cable TV

• Western Instruments: Undersea umbilical/neutral tether/video system for Hydra-2500

• ROV, first deep diving ROV in search for Oil 100 miles off Cape May, NJ at 2500 m depths

• Western Geophysical/Guidance & Controls Liaison Officer: All Optical Towed Array (AOTA)

• First all optical marine streamer for geophysical exploration in industry

• Successful sea trial of five sensor streamer, 1985

• Bendix Oceanics: Expert System for Cable Design, SPICE model, 50,000 lines FORTRAN

• McDonnell Douglas : Lab Engineer: Sensors, FOG, Polarization Fading White Paper,

• Mast Mounted Site Helicopter Electro-Optic Day/Night Vision System

• Commonwealth Edison: Analyzed optical fiber network architecture, developed RFP

• for private TBON fiber optic network using ComEd right-of-way, towers, road access,

• and legacy electronics-nuclear, fossil and commercial real estate facilities.

• Engineered/overbuilt 13 sites, 200 route miles of inside/outside plant engineering.

• Consultant: Installed fiber optic networks for East Coast cities, design/lay out architecture

using configuration spreadsheets based on vendor specifications.

• PTII: Built/debugged working prototype Impedance Test Set for Telco Copper in the Loop,

tested subscriber pair verifier replacement due to metallic test unit discontinuance.

The latter years 1998-2015 • Boeing: Designed/Installed Delta-4 Optical Fiber Comms on Launch Complexes SLC-37/SLC-6

• Environmental Tests FO Tool Kit: OFM1020 OTDR/28VDC Pwr Module/Flight Test Adapters

• FO Tool Kit Payload flown on ISS mission 6A (4/19/01) with de-orbit (6/12/01)

• Performed thermal analysis DNA Bioreactor as NASA Spinoff, written into NIH paper.

• Consultant: Designed orbital hypersonic tether systems for multiple purposes.

• Honeywell: Deployed TASS System as Field Engineer-US AOR, Air Bases, Iraq

• NG Consultant: Scrubbed cable/connector drawings ASDS mini submarine.

• SFO: Analyzed requirements for 300 man space station concept, 2004 Space Congress.

• Consultant: Analyzed optical test set LabView, tested passive optical fiber components.

• Consultant: Designed Star Tracker for satellite payload using Blackfin DSP.

• Wrote chapter in book: Liftport Opening Space to Everyone-Space elevator deployment .

• SEB Tech: Developed Test Metrics-active RFID Tag/Reader migration to open standards.

• Ultra Electronics ATS: Engineer Microwave Network (L Band, X Band, Ku Band) Bahrain,

• verified microwave path, loss budget, antenna radiation patterns, & sub contractor work.

• Designed wireless microwave link Oil & Gas customer Northern Canada production site, reverse

engineered IED threat, design & test of NASA Ground Station antennas (2x20m, 1x5.5m)

• Supported TDRS Ground Station, Blossom Point, MD (2) 20 m SGL (1) 5.5 m EET Antenna.

• Analyzed LTE user equipment, determined power distribution, created interference model LTE

user equipment onto GOES/GOES-R GEO/NPOES Polar satellite down links in 1675-1695 MHz

band. Analyzed I/N=-10 dB ratios: multiple sites, determined exclusion zone radii.

• Perform Field Strength Gap Coverage Analyses at FAA for Distance Measuring Equipment over

continental USA. Generated graphics (KML) and data (DBF, CSV) file export, post-processed large

data files using Matlab Code to quantify redundancy and follow-on capacity analyses.

Electro-Optic Umbilical Cable Hydra-2500 ROV

Optical Fiber Video Camera, neutral tether plus umbilical optical cables to surface ship Discoverer Seven Seas control shack

Optical Fiber Sensor Visibility Equation 7 as function (temperature, pressure)

Polarization Fading Analysis Optical Fiber Tow Cable: McDonnell Douglas

RF Test Station for Mast Mounted Site Electro-Optic Sensor

Commonwealth Edison (Chicago, IL), Telecommunications Backbone Optical Network (TBON) Dual OC-12 Ring with OC-3 Shelf DS1 Drop/Inserts:1992-1995 Designed/Installed outside plant, inside plant, and SONET OC-3/OC-12 ADM’s, TM’s, CSU/DSU, OLIU cards, 1/0 DACS, and ICB for a SONET OC-12 network. Configured plug-in cards for channel banks, CSU/DSU, and DACS equipment. Familiar with DS0, DS1, and DS3 test set, telephone butt set, and break-out box to certify DS0 and DS1 circuits for operation on the network through loop-back, continuity, BER, and optical testing (bi-directional OTDR and insertion loss). Provisioned voice switches for cross connect DACS onto a dual SONET ring. Provisioned legacy PBX phone switches down to the punch block, verified wiring Pin-outs using the Fireberd BERT circuit analyzer.

DDM-2000 OC-3 Shelf

Dual Inner/Outer OC-12 Ring Interconnect Telco Systems Route-24 ICB I/F to DDM-2000 OC-3 Shelf

Commonwealth Edison (Exelon, Chicago, IL) Telecommunications Backbone Optical Network (TBON) Eleven Analog/Digital/Voice Circuit Test Methods were executed using Fireberd Bit Error Rate Test Sets, Hand Held TIMS, Butt Sets, RJ11, RJ45, V.24 cables, ABAM DS1 cables, and cross-connect panel interfaces. The circuits were a mix of half-duplex/full-duplex, legacy analog data, digital data, and voice. Some circuits were tested one direction ONLY, while other circuits were tested in BOTH directions. The requirement for a second DS0 Test Set and a second TIMS Test Set drove the tests, so we did not need to Loop the circuit back on itself at Far End “B” and test with a single Fireberd 6000 BER test set from end “A” only. This proved the SONET Network circuit paths end-to-end but did NOT accommodate latency concerns. The tests were written in one day, and executed over a period of several weeks for several hundred mixed analog/digital circuits with circuit test slides available in back-up section.

MFS East Coast Optical Fiber Network Builds: White Plains, Albany, Buffalo, Boston, NYC, Newark, Philadelphia, Washington DC ICG Optical Fiber Network Builds: Nashville, Birmingham, Charlotte

PT Industries International: Advanced Pair Test System Test Head Copper in the Loop Central Office Impedance Test Set

Subscriber Pair Verifier (SPV) Functional Diagram

Type Connection: Single Function Test Head

Type Connection: Multi-Function Test Set

I designed the HASTOL Orbital Hypersonic Tether for Dr. Robert Forward, Tethers Unlimited

Boeing Delta-4 Delta Operations Center (DOC), Space Launch Complex SLC-37

144 Count Single Mode Optical Fiber Cable Cross-Section I installed this cable between DOC and SLC-37 CSB (9,000+ Ft)

144 Count Single-Mode Fiber (SMF) Cable route: Delta Operations Center to SLC-37 Common Support Building (CSB)

I installed optical fiber termination racks in DOC and SLC-37 CSB

Common Support Building (CSB) Communications Room, Location of Optical Fiber Cable Terminations

Space Launch Complex-6, Vandenberg AFB Delta-4 Launch Complex

Two 72 Count Single Mode Optical Fiber Cables were installed into existing roadbed between DOC and SLC-6 according to my recommendations using a diamond saw to defer disturbance of Native American Hallowed Ground

Remote Launch Control Center (RLCC) Building 8510 North VAFB to SLC-6 Delta-4 Launch Complex South VAFB. Two 72 Count SMF Cables were cut and placed into existing road bed route using diamond saw (T Cash recommendation)

ISS FO Tool Kit OTDR Primary Fault Isolation

OTDR/Reel Patch Cable Flight Test Adapters

OTDR Signature: FO I/F

Terminated Flight Links

Crew Bench Review 3/20/01 KSC T Cash present in photo

Tactical Automated Security System TASS System installed by T Cash at US AOR on Air Bases in Iraq

Advanced SEAL Delivery System Submarine US Navy Scrub of cable/connector pinouts for production drawings

PM J-AIT STS Overview

Movement Tracking System

• Provides automatic detection of RFID Tags on board MTS trucks • Low-powered RF interrogator integrated into MTS transceiver • Read data will be provided to RF-ITV-I Server

MTS Hub

RF-ITV-I Server

XML-based Feed • Position Reports • Text Messages • RFID Tag Reads

Embedded RFID in MTS System Interoperability

Savi ANSI-256 Active RFID Tags

654 Tag

656-I Tag

ISO Container Tag ISO Container

Tag with sensors

675-I Tag

Portable Deployment

Kit

650 Reader

SMR 650-210

673 Tag

Engine Container

Sensor Tag

Intermec 751G/A With 650P

Docking station

with 654 adapter sleeve

T Cash was SME for PM J-AIT RFID-II Contract Products

Field Test Configuration:

Test ID Application Reader Height

Polling Cycle

50' (14 tags) 150' (14

tags) 300' (22

tags)

Rest 654 | 674

|410 654 | 674

|410 654 | 674

|410

8 | 4 | 2 8 | 4 | 2 12 | 6 | 4

1A

Percent Tags Collected

Average Tags Collected

TIPS Read 20' Contnuous 97.14% 87.86% 71.36% 13.6 12.3 15.7




TIPS Read 20' Contnuous 97.86% 85.71% 71.36% 13.7 12 15.7

Average 98.29% 86.60% 70.55% 13.76 12.124 15.52

1B

Percent Tags Collected


SM Read 20' Contnuous 97.86% 90.00% 81.36% 13.7 12.6 17.9



SM Read 20' Contnuous 100.00% 92.14% 81.82% 14 12.9 18


Average 98.57% 92.00% 81.18% 13.8 12.88 17.86

Tag Read Performance Distance from Reader

Comments Tag Type: 654/674/410 Qty: 50 Reader: SR-650 Orientation: Vertical\Horizontal\Orthogonal

ANSI Read Test – Tags at Rest

Field Test Configuration:

Test ID Application Reader Height Polling Cycle

# of Tags Collected @ 15 MPH



410 |654 |674 410 |654 |674 410 |654 |674 ISO & ANSI

2F Percent Tags Collected


TIPS Read 20' Contnuous 80.00% 100.00% 40.00% 4 5 2





Average 88.00% 88.00% 76.00% 4.4 4.4 3.8

2G Percent Tags Collected


SM Read 20' Contnuous 100.00% 40.00% 40.00% 5 2 2





Average 92.00% 68.00% 40.00% 4.6 3.4 2

Dual Mode Read Test - Tags in motion

Comments

Speed (MPH)

Tag Type: 410\654\674\ Qty: 1 \ 3 \ 1 Reader: Dual Mode SR-650 Orientation: Vertical\Horizontal\Orthogonal

Bahrain Microwave Network: Seven Sites Across Island

NERA MW Radio: Multiple Sites (7) PTP Links

MW Tower, each site varies

T Cash Microwave Network Consultant MW Network Path Loss Analysis MW Antenna Pattern Analysis Access (Voice/Data) Channelization MW Test Requirements Analysis Verified status and quality of microwave sub contractor work progress

Enter your System Information in Blue Boxes Only, do not change formula in Red Boxes.

INPUT DATA

Site Name Transmitter Receiver

Antenna Gain (dBi) 36.8 36.8 Frequency (MHz) 15000

Losses (Misc,Conn,TX,RX) 6.8 6.8 Path Length, PL (km) 5

Loss/100 ft. 1.137 1.137 Path Length, PL (miles) 3

Cable Length (ft) 147.64 288.71

Cable Loss 1.6786668 3.2826327

Antenna Height (Meters) 35 47.5 Modulation Receiver Sensitivity (dBm) -76.5

Transmit Power (milliwatts) 2000 DBPSK 9.6kb/s -85.5

Transmit Power (dBm) 22 DQPSK 19.2kb/s -82.5

Effective Radiated Power (dBm) 50.3 8PSK 28.8kb/s -79.5

Receive Threshold Criteria 1X10-8 16QAM 38.4kb/s -76.5

Calculation Free Space Path Loss = 36.575 + 20Log (D) + 20 Log (F)

System Gain (dB) 156.8 Availability = 100%*(1-C * T * F* D3 * 10-f/10 * 10-4)

Free Space Path Loss (dB) 130.33 Maximum Radio Distance = 4*(Tx^0.5 + Rx^0.5)

Fade Margin 26.49 dB Where:

Climate Factor (0.1 to 0.5) 0.30 D is Distance in between the antennas in miles

Topology Factor (0.25 to 4.0) 0.25 F is Frequency in MHz

Availability (%) 99.999133% C is Climatic Factor ranging from 0.1 (mild & dry) to 0.5 (severe, humid)

T is Topology Factor (ranging from 0.25 (mountainous) to 4.0 (flat land)

The Maximum Radio Distance Tx is Transmitter Height in Meters

(MRD) between two sites based 51.23 km Rx is Receiver Height in meters

upon the above data is:

How to use Path Calc Chart

Enter the INPUT DATA - antenna gain, cable loss, cable length - etc,

Enter the required Path Length (distance) into Cell F7

NB: The above figures are guidelines only Review Fade Margin (Cell C20) below 20 dB is unacceptable

ArWest cannot be held responsible for accuracy Increase/Decrease PL until Fade Margin is acceptable

Compare PL with MRD (Cell C26)

Increase/Decrease Antenna Heights until MRD > PL

Typical Bahrain Microwave Network Free Space Path Loss Calculation

Parabolic Antenna Analysis Bold

Frequency = 1500.0 MHz; 20.0 cm

Reflector Diameter = 2.44 meters = 8.0 ft

Reflector Depth = 2.64 meters = 8.7 ft

Focal length = 0.14 meters = 0.5 ft; F/D = 0.06

Feed Illumination Angle = -0.91 radian = -52 degrees

Illumination Efficiency = 50 %

Computed Antenna Gain = 7.3E+02 Ap = 28.7 dBi

Antenna Half Power Beamwidth = 8.4E-02 radian = 4.84 degrees

Minimum Drift Scan time = 1.9E+01 min = 1160.6 sec

Link Antenna Model Gain (dBi)

Kay Height (m)

JOC Height (m)

Aperture (m)

f (MHz) Depth (m)

KAY-JOC SP8-1.3NS (TR) 29.2 27.0 57.0 2.4 1500.0 2.6

Typical Bahrain Microwave Network Antenna Pattern Calculation

NASA TDRS Ground Station, Blossom Point, MD (2) 20 mtr SGL, (1) 5.5 mtr EET Antennas

SCNS Contract Principal Engineer (Orbital) RF Design, Test, Installation Factory Acceptance Test Site Acceptance Test Site Construction and engineering support Assured quality of RF engineering work

NASA TDRS Ground Station, Blossom Point, MD (Assembly of 20 meter SGL Reflector Antenna

NASA TDRS Ground Station, Blossom Point, MD SGL 20 meter S-Band Feed

NASA TDRS Ground Station, Blossom Point, MD SGL 20 meter Ku-Band Feed

NASA TDRS Ground Station, Blossom Point, MD SGL 20 meter Subreflector

Determined LTE user equipment transmission power distribution.

NOAA GEO/Polar Sat D/L Interference Analysis from LTE Cellular U/L

Wallops Island Half-Annulus Exclusion Zone: 5 Km, I/N=-10 dB

NOAA GOES-R Sat D/L @Wallops Island, VA Interference from LTE Cellular U/L

I/N=-10 dB

NOAA Site Exclusion Zones for GOES-R Down Links

NOAA Site Mitigation Zones for POES Polar Down Links:

Site Distance to mitigate for I/N = -10 dB (km)

Distance to mitigate for I/N = -20 dB (km)

Wallops Is., VA 288 375

Fairbanks, AK* 47 56

Suitland, MD 300 325

Miami, FL 360 374

Monterey, CA 84 100

Hawaii 23 96

Barrow, AK 300 308

Boulder, CO* 120 125

* No ducting (reverted to P.452 V12)

Mitigation distances extend from 23 to 300 Km due to coincidence

of beam pattern between LTE cellular U/L antenna and Polar

Ground Station D/L Antenna.

Potential mitigation: Use of selective filters and remote

NOAA site locations for Down Link.

Sanity Check #1:

Re-ran Miami analysis using:

P%=50, I/N threshold=-10 dB

Result: Distance to mitigate=44 Km (Alion)

Assumption P%=50:

NTIA distance to mitigate=46 Km

Industry distance to mitigate=39 Km

This shows the models are in agreement when

we make similar assumptions.

Sanity Check #2:

Study effects of P% using RFI from a single UE

Assumptions: UE Ant Ht=1.5 m, NOAA Earth Station

Ant Ht=12 m AGL

Plot P% vs Distance to mitigate (Km)

Plot Path Loss (dB) vs distance to mitigate (Km)

as P% is varied:

Distance km 10 8.4 9.2 4.6 -5.1 dB

50 -2.6 -3.9 -10.2 -23.5 dB

100 -3.2 -2.8 -4.8 -4.6 dB

200 -11.2 -16.6 -5.3 -2.9 dB

300 -21.8 -22.1 -3.2 -4.3 dB

400 -21.2 -8.7 2.2 -5.3 dB

500 -11.5 -5.2 2 -5.7 dB

600 -6.1 0.9 1.5 -5.9 dB

Average delta -8.7 -6.2 -1.7 -7.2 dB

Overall average delta -5.9 dB

Note: Data based on Visualyse built in propagation models, no terrain used (elevation = 0 for all points).

Propagation model comparison

Provide field strength map inputs-5 altitudes; layered together for assessing the NAS-wide signal-in-space coverage of entire DME

network at an evaluated altitude.

The DME-DME signal coverage fidelity depends on propagation factors, reflection, diffraction, ground conductivity, and multi-path

that bends the signal paths and distorts where the 54 dBuV field strength boundaries exist among neighboring DMEs.

Use DME signal parameters, frequency band, power, and antenna gain that cumulatively produce worst case signal areas (DME-

DME signal gaps).

1080 MHz (Less than ±0.2 n-mi range error w.r.t. High/Low frequency)

1-kW (-20 n-mi range error w.r.t. 3.5-kW for sites near sharp conductive gradients)

9.5 dBi (Less than ±0.2 n-mi w.r.t. 7 dBi)

Terrain Analysis Package (TAP) chosen due to propagation module simulating an accurate air-ground signal attenuations due to

terrain.

Field strength granularity: 500 (160 n-mi) radials with 0.1 n-mi step intervals.

Aircraft’s antenna must be referenced in Mean Sea Level in TAP.

5,000-ft MSL does not exist at 140 of the 945 DMEs (all in WSA).

Introduction – Background

Analytical Methodology – Signal Coverage Maps

Finite-Element Set Theory Grid Each elements presents 1-square mile segments of space at an evaluated altitude.

Each field strength for each element derives from the DME coverages created by TAP.

If any(B(x) < 54 dBu), then signal deficient area exists in NAS.

If any(B(x) < 2 DME signals), then signal deficient area exists in NAS.

Analytical Methodology – Signal Coverage Maps

Results – 14,500-ft MSL DME-DME Signal Deficiency

3 or more

2 or less

1 or none

3 or more

1 or none

Signal gap borders found at 14,500-ft MSL

Expectedly, signal gaps shrink at higher altitudes.

Coverage concerns confound to WSA.

Results – 18,000-ft MSL DME-DME Signal Deficiency

Conclusions and Recommendations:

Current DME-DME network provides 100% coverage (with two or

more signals) inside 27 of the 36 Class B terminal areas, and inside

87 of the 118 Class C terminal areas, with signal conditions for Class

D unknown; creating continuous coverage 5,000-ft AGL may be

severely limited by frequency availability and interference constraints.

33 new DMEs required for continuous coverage at 14,500-ft, six sites

in state of Nevada for no signal areas; expanding protection for eight

DMEs in NV, current network is capable of supporting RNAV at

FL180 and up for CONUS.

Cross-examine signal gaps in context of the air traffic density and

airports within their vicinity.

Examine the DME interrogation capacity, workloads, and their effects

on signal availability within low signal quantity areas of the NAS.

Validate signal coverage data with flight test data for several DME.

Analyze the Class D terminal areas once a complete, current list of

their locations is available.

KML Demo

Backup Slides

Timothy_J_Cash_Career_Portfolio_Rev_6

Documents

optical fiber comms

cable design engineer

optical test set labview

coaxial cable

engineer microwave network

optical marine streamer

space congress

installed fiber optic