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NWO Science Telescope
25 Aug 20082
NWO Team Membership: Organizations, Roles, and Leads
• Team consist of 43 active members– 9 organizations are participating
• Additional involvement is provided from each organization and includes technical area experts and graduate/undergraduate students
• Organizations, Roles and Leads:– Colorado University: PI, Science, Optical Design, and Systems Analysis: Webster
Cash– Northrop Grumman: Deputy PI and Starshade Development: Amy Lo– Ball Aerospace Technology Corporation: Telescope Development: Charley Noecker– USNO: Astrometry: Rachel Dudik– NASA GRC: Occulter (Starshade) Propulsion: Scott Benson– KinetX: Mission Design and Navigation: Bobby Williams– GSI: Lead Scientist: Maggie Turnbull– University College of London: Exoplanet Spectra Modeling: Giovanna Tinetti– NASA GSFC: Study Management: Kate Hartman
NWO Science Telescope
25 Aug 20083
The New Worlds Observer• The telescope is shaded from the star by the starshade
– Beside a vanishingly small residual signal, starlight never enters the telescope
Starshade
100% of the planet light still reaches the telescope
NWO Science Telescope
25 Aug 20084
A Starshade Can Work with Any Telescope
10m
2.4m
4m
1.2m
Export Control NoticeExport or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. Government.
Measure Planetary System Characteristics
Zodiacal Light Indicates Orbital InclinationSo Do Multi-planet Position Statistics
NWO Science Telescope
25 Aug 20086
Planet Finding with StarshadesFive Random Systems from Raymond Database
The higher resolution of ATLAST brings weak signals out of the noise
ATLAST
JWST
NWO Science Telescope
25 Aug 20087
Spectroscopy of Earths
JWST ATLAST
ATLAST @ High ResolutionFine Structure!
NWO Science Telescope
25 Aug 20088
• Exozodiacal Light and Debris• Will Give Clues on Whole System• May Interfere with Planet
Detection
• NOTHING is yet knownabout Exozodis– Solar System zodi has red
scattered light color– Known debris disks show red, grey,
& blue colors
Greaves et al. (2005)
Epsilon Eridani
Measure Planetary System Characteristics
AU MicBlue
HD 92945Neutral
Beta PicRed
NWO Science Telescope
25 Aug 20089
Perform General Astronomy
• During 70% of Observing Time the Starshade will Be Travelling to the next Target.
• Unify Exoplanet and UVOIR Communities• Very Broad Range of
Astronomy Served
KBO UB313
NWO Science Telescope
25 Aug 200810
Modeling and Lab Studies
• Opaque Starshade
TheHypergaussian function
Apodization Function
expnr aT
b
• Apodizing Function
Radius
Tran
smiss
ion
Parameter
Occulter inner radius a
Petal 1/e length b
Hypergaussian order n
Distance to telescope z
Number of petals P
NWO Science Telescope
25 Aug 200811
Modeling and Lab Studies
• The starshade has broadband suppression performance
• Starshade designed for longest wavelength suppression, and then works BETTER at all shorter wavelengths
• Several simulation codes exist
• Code cross checked and in process of being validated by laboratory results
Linear Log
NWO Science Telescope
25 Aug 200812
NGS Starshade with HID source, 1000s integration
Total suppression within 200 pixel radius = 8.8e-006
wire
wire
wire
Wire3.9e-7
wire
Wire4.3e-7
(Chamber door open)
Chamber door closed
NWO Science Telescope
25 Aug 200813
5.05e-010
6/19/09 Image27- 600sec
NWO Science Telescope
25 Aug 200814
NWO Mission Overview
NWO Science Telescope
25 Aug 200815
Starshade Design and FabricationEnabling Technologies
Precision Shape Control •Maintain edge position•Maintain structure shape
Precision Deployment •Minimize jitter•Maintain petal location
Opaque Membrane•Maintain opacity•Lightweight
2 Axes Formation Flying•Maintain 1m alignment•Minimize jitter
Enhancing Technologies
Solar Electric Propulsion•NEXT engine•Increase observable targets•Reduce propellant mass
Lightweight S/C Structures•Increase observable targets•Reduce overall mass
Thin Edge Treatment•Maintain edge stability•Minimize stray light
NWO Science Telescope
25 Aug 200816
Starshade Alignment Systems
See Telescope fromStarshade
See StarshadeFrom Telescope
NWO Science Telescope
25 Aug 200817
JMAPS TIMELINE
Objectives and Description:• Fully Funded mission ready for December
2011 launch• Dedicated, high-accuracy astrometric
instrument– Single measurement precisions (narrow
field) of 5 milli-arcseconds from 0-16 mag.– 1 milli-arcsecond global accuracy over 3
year mission life
JMAPS Mission Goals:• Update star catalogs, viable for decades• Demonstrate 10mas attitude determination
on-orbit• Mature critical optical and FPA technology
NWO Formation Flying Solution:• State of the art optics and detector technology
permits high accuracy astrometry—critical for NWO formation flying
• Updated stellar catalog in time for NWO
Instrument Parameters: • 7.5”, f/20 ultra-low-distortion
optical/NIR astrograph telescope
• SiC optics, metering structure• Advanced, large format CMOS
Hybrid FPA• Gratings for color sensing• Mass ~ 40kg• Power ~ 85W
United States Naval ObservatoryJoint Milli-Arcsecond Pathfinder Survey
NWO Science Telescope
25 Aug 200818
GRC: NEXT Ion Propulsion System
• Starshade Spacecraft requirements strongly favor use of electric propulsion to maximize science
• NEXT ion propulsion system provides greatest number of targets with the simplest system configuration compared to other EP options
• Thruster performance and lifetime capabilities provide significant flexibility in implementing primary and extended mission operations
• Critical elements of a NEXT system are planned to achieve TRL6 under the NASA SMD In-Space Propulsion Technology Project
• NEXT can be implemented on NWO with low risk through planned transition-to-flight development
NWO Science Telescope
25 Aug 200819
The Top Technology Tall Poles for NWO
NWO TALL Poles• Starshade optical performance simulation and
validation• Starshade deployment and shape maintenance • Trajectory and Alignment Control (TAC) system
– Both sensors and control algorithms
• 4m telescope design and high sensitivity detectors
NWO Science Telescope
25 Aug 200820
NWO Technology Development Roadmap
NWO Science Telescope
25 Aug 200821
NWO Study http://newworlds.colorado.edu
This is what a multi-billion dollar flagship should be.
Engage the public like Voyager and Hubble
Unify the astronomy community
Other, lower cost missions, should support this goal without slowing it down.
ANSWER THESE QUESTIONS:
ARE THERE HABITABLE PLANETS IN THE UNIVERSE?IS THERE LIFE IN THE UNIVERSE?
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