proprietary january 15, 2006 ann arbor, mi balloonwinds integration status
TRANSCRIPT
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January 15, 2006
Ann Arbor, MI
BalloonWindsIntegration Status
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BalloonWinds Overview/Goals
• Validate instrument system models for a downward looking platform in a near space environment
• Demonstrate Multi-Order Photon Recycled Fringe Imaging from a high altitude (30 km) balloon
• Demonstrate technology under as many atmospheric conditions as possible; i.e. high and low clouds, high and low winds, variable boundary layer aerosol conditions, day and nighttime
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The Fringe Imaging Approach
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Team & Organizational Responsibilities
FibertekSubcontractor
RaytheonPartner
MACCo-I
UNHPI/Co-I
FibertekSubcontractor
RaytheonPartner
MACCo-I
UNHPI/Co-I
University of New Hampshire (UNH)-System/Integration
CCD Camera
Thermal Management, Power Distribution and Telemetry System
Gondola Design and Systems Engineering
Control Electronics Chamber Design
Michigan Aerospace Corp. (MAC)-Instrument
Instrument Systems Engineering
Interferometer and Environmental Packaging
Laser/Telescope System and Environmental Packaging
Instrument Control System
Control Electronics Packaging
Raytheon- Santa Barbara Remote Sensing (SBRS)
Telescope, Laser Development Oversight
Fibertek
Diode Pumped Laser
NOAANOAA
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Balloon Flight Overview
Data Collection Time at Float 8 Hours
Launch Site Holloman Air Force Base, NM
Flight Altitude 30km (100,000 ft)
Temperature/ Pressure @ Float -450C and 5 milli-bar
Elevation of Telescope -45º ±1º
Gondola Rotation Rate < 3 rotation/hour
Vibration/Shock 3G Max takeoff
Measurement Range Clear night skies: (float – 2 km) to Ground
Cloudy night: (float – 2 km) to (cloud top + 1 km)
Altitude Gate Size 1 km > 3km; 0.25 km ≤ 3km
LOS Profile Measurement ≥2 seconds
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Flight ScheduleFlight # Objective Atmospheric Condition Mission Date
1 Nighttime Concept Demonstration Night: Clear Air May 2006
2 Daytime Concept Demonstration Day: Partly Cloudy May 2006
3 Day & Night System Demonstration Day & Night: Partly Cloudy Sept. 2006
Comments/ Notes
• All balloon flights will include molecular and aerosol channel optimized interferometers
• First 2 flights are intended to be concept demonstrations
• Flight 1: Demonstrate the electrical, thermal, mechanical, and optical performance of the integrated instrument for nighttime flight conditions.
• Flight 2: Demonstrate the ability to operate during the daytime given the additional thermal load and the increased optical background
• Instrument modifications required for the final flight will be made in the 4 months leading up to the final flight.
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Gondola Design
• Gondola Mass: ~5000 lbs
• Power Requirements: 1300 W
• Thermal Management: Ice Phase Change, 0°C coolant temperature
• Size: 8’ h x 8’w x 12’ l
• 26-28 Lithium Ion Batteries
• Gondola Mass: ~5000 lbs
• Power Requirements: 1300 W
• Thermal Management: Ice Phase Change, 0°C coolant temperature
• Size: 8’ h x 8’w x 12’ l
• 26-28 Lithium Ion Batteries
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BalloonWinds Program Status at a Glance
Main Sub-Systems Build/Test Notes
Interferometer Subsystem X Optical, thermal, mechanical, electrical, and control completed
Laser-Telescope Subsystem X Optical, thermal, mechanical, electrical, and control completed
Instrument Control System X Tested with all instrument system hardware
Gondola Frame 90%
Control Electronics Chamber Delivered & Pressure Tested
Complete Integration upon delivery of instrument control electronics from MAC
Battery Boxes 90%
Thermal Chamber Delivered Will be tested once full gondola integrated with instrument system
BalloonWinds Trailer Delivered
• Instrument system being delivered to UNH for gondola integration this week
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BalloonWinds Control Architecture
Ground Network
UHF RS232 BalloonCommunications
Local Network
RAID Disk DriveArchive
Gondola
Apogee AMITC
CommandImages
Telemetry
InstrumentControl
CMD\TM
CMD\TM
Power Cmd/Data HandlingMicrocontroller
Thermal Control
S Band
S BandDemodulator
Command/Display
Analysis
TCP/IP
TCP/IPApogee LabsGround Station
AFRLHealth and Safety
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Gondola FrameElectronics Chamber -Thermal Chamber
Gondola Hardware
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BalloonWinds Trailer
8’ Office
• Trailer is 30’ long and 13’ tall
• Door for trailer acts as ramp for gondola to be rolled into
• Trailer contains office and all ground support equipment
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GroundWinds- BalloonWinds ComparisonBW GW Impact
Laser Diode Pumped Flash lamp Space prototype 10x more efficient and much more compact & rugged.
CCD Andor EMCCD Pixel Vision High reliability and shot-limited performance. Pixel Vision went out of business a 1 ½ yr ago.
CLIO External Internal Enabled transition to commercial CCD without major impact.
INTF Design
Single Detector/ Dual Channel
Each channel Separate Rail
BW is far more compact and provides a path to a space instrument.
Telescope Primary is from Space Design
Amateur Quality BW telescope is higher quality and efficiency as well as athermal.
Beam Steering
Active: High Dynamic Range
Manual Accommodates environmental induced alignment changes quickly.
Fringe Resolution
M: 50 Ch/FSR
A: 19 Ch/ FSR
M:20/25 Ch/FSR
A:8 Ch/FSR
Improved fringe modeling.
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BalloonWinds Optical Path Layout
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Laser-Telescope SubsystemLaser
GLTI
Telescope
• Laser Head & Control Electronics
• Beam Delivery and Beam Steering
• Independent telemetry data acquisition system for environmental monitoring and power control.
• Liquid to air heat exchangers regulate internal temperature
• Pressure maintained to 1.0 ATM
• Telescope and laser coupled through common interface (GLTI)
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BalloonWinds Telescope
Diameter 50 CM
FOV 190 μ radians
Overall Measured Efficiency 88%
Encircled Energy @300 um 98%
Manufacturer LightWorks
• Athermal design: 30 C to –55 c focal change <2 mm.
• Rigid structure: Elevation change from +45 to –45 the pointing angle deviates 49 urad
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Diode Pumped LaserLaser & Chamber
Wavelength 355 NM
Pulse Frequency/Length 50 HZ/ 20 ns
Divergence (Expanded) 110 μ radians
Average Output Power 4.2 Watts
Type (ND:YAG) DIODE PUMPED
Manufacturer FIBERTEK
Raw Input Power 250 Watts
• Laser is thermally controlled by forced convection
• Electronics and optical head integrated as one unit
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Diode Pumped Laser Frequency Stability
• Histogram was derived from 1200 measurements
• Results indicate a ~5MHz RMS laser frequency stability
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Laser Chamber Integration To Test Frame
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Integrated Laser-Telescope System
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Laser Enclosure Subsystem
Connector Block
2nd Beam Expander Assembly
Beam Fold Mirror
FiberTek 355nm Laser Assembly
Reference Fiber Pick-off
Assembly
Beam Delivery Window
Beam Steering Assembly
Heat Exchanger O-ring Seal
1st Beam Expander
Top Down View
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Laser Enclosure Subsystem
Connector Block
2nd Beam Expander Assembly
Beam Fold Mirror
FiberTek 355nm Laser Assembly
Reference Fiber Pick-off
Assembly
Beam Delivery Window
Beam Steering Assembly
Heat ExchangerO-ring Seal
1st Beam Expander
Top Down View
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Beam Delivery Optics in Laser
Chamber
Beam Delivery Plate
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Laser Chamber After Internal Harnessing
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BalloonWinds Gondola/Instrument Concept
1. Shock Mounted, Thermally Controlled Hermetic Vessel 20” ID x 44”
2. Molecular & Aerosol Interferometer Channels
3. Etalon Control Electronics
4. Narrow band Pre-Filter and associated optics
5. PMTs for telescope alignment and amplifiers
6. CCD Camera and Power Supply
1. Shock Mounted, Thermally Controlled Hermetic Vessel 20” ID x 44”
2. Molecular & Aerosol Interferometer Channels
3. Etalon Control Electronics
4. Narrow band Pre-Filter and associated optics
5. PMTs for telescope alignment and amplifiers
6. CCD Camera and Power Supply
Interferometer Chamber
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Interferometer Part Identification
Aerosol Etalon
Filter BoxCLIO Exteder
Camera
Recycler Mount
Fold Mirror
Molecular Etalon
Collimator Lens
Objective Lens
Relay Lens
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BalloonWinds EtalonsBalloonWinds Molecular Aerosol
Plate Spacing 1.60 cm 5.58 cm
Number of Orders 5.0 13.5
Free Spectral Range (FSR)
0.3125 cm-1 0.089 cm-1
Dynamic Range 1644 m/s/order
473 m/s/order
Plate Diameter 6.0 6.0
Coated Clear Aperture 5.0 5.0
Reflectivity 0.70 0.80
Etalon Plate Flatness Lambda/150 Lambda/150
Loss/Plate <0.01 <0.01
Number of CCD Channels 200 230
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Aerosol Channel of BalloonWinds Interferometer
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Molecular Channel of BalloonWinds Interferometer
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Top Down View of BalloonWinds Interferometer
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Side View of BalloonWinds Interferometer
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BalloonWinds Interferometer Pre-Chamber Integration
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BalloonWinds Interferometer System with Flight Harnessing
Fiber Harness
Cooling Lines
Electrical Harnesses
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Recycler Face Recycler Fiber Assembly
Molecular Interferometer System
Fiber Illumination Through Etalon
Fringe Spectrum Through Recycler
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Molecular Interferometer System
Fringe Spectrum Through Recycler
Fringe Image Through Extender
Molecular Fringe Spectrum Through Full System
• Molecular Finesse = 5.7
• Recycling efficiency = 2.1
• #Orders = 4
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Aerosol Fringe Image Full Optical System
• Finesse= 6.87• Recycling efficiency=2.3• #Orders=12
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First BalloonWinds Fringe Image
Molecular Return Aerosol
Return
Laser Reference
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Expected System Performance Andor
Telescope
FOV 190 urad
Diameter 50 cm
Sep. from Laser 68.5 cm
Laser
Divergence (5x) 0.110 mrad
Beam Diameter 5.0 cm
PRF 50 Hz
Power 3 watts
Wavelength 355 nm
CCD
Read Noise 0.09 e-/read
Dark Counts 0.01 e-/sec/pix
#Images Read 250
Integ. Time 5 Seconds
Measured Sys Eff*
4.5%
UA Bin Size 3
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Wrap-Up• What will be complete by next meeting….
– Full system integration
– Side by side inter-comparison with GroundWinds NH
– Thermal Vacuum testing of Gondola System
– First Flight
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ACKNOWLEDGEMENTS
• The BalloonWinds team would like to thank the National Oceanic and Atmospheric Administration (NOAA) for their continued support of the GroundWinds and BalloonWinds fringe imaging technology.
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Innovation & Results
We are hiring!Optical Engineers/PhysicistsMS or PhDSenior and entry level positions availableU.S. citizenship required