PCW Eric DonovanJanuary 12, 2011 Eric Donovan and Emma Spanswick Global GeoSpace Imaging on PCW MTR.
-
Upload
coleen-hicks -
Category
Documents
-
view
214 -
download
1
Transcript of PCW Eric DonovanJanuary 12, 2011 Eric Donovan and Emma Spanswick Global GeoSpace Imaging on PCW MTR.
PCW
Eric Donovan January 12, 2011
Eric Donovan and Emma Spanswick
Global GeoSpace Imaging on PCW
MTR
PCW
Eric Donovan January 12, 2011
Solar Radiation
Energetic Particles
Solar Wind
PlasmasphereThermosphereMesosphereIonosphereAtmosphereRing CurrentPlasma SheetRadiation Belt
Auroral accelerationWP InteractionsReconnectionBBFCD InstabilityInjectionMHD WavesGravity WavesJoule HeatingSudden Impulse●
●
●●
●
PCW
Eric Donovan January 12, 2011
Auroral Zone
PCW
Eric Donovan January 12, 2011
Limitations of all previous global imaging efforts
PCW
Eric Donovan January 12, 2011
PCW
Eric Donovan January 12, 2011
PCW
Eric Donovan January 12, 2011
40 years of global imaging has taken us to….some spectral resolution~100 km of kilometre spatial resolution (plus no
contemporaneous smaller-scale imaging)30 – 120 second temporal resolutiontime limited image sequences (10 hours or less)serendipitous conjugate imaging
There are compelling scientific reasons for wanting to do better….PCW is a unique opportunity to move forward in a dramatic way.The combination of the orbits, Nadir-pointing, and advances in
imaging technology set the stage for (by far) the best space-based auroral imaging in history. This will even allow for systematic conjugate imaging in partnership with KuaFu, and will enable Canada to take a world-leading role in GeoSpace at the “System Level”.
PCW
Eric Donovan January 12, 2011
Science/Space Weather Objectives
Magnetospheric drivers of auroral type, structure, and dynamics: e.g., What causes auroral arcs? What causes diffuse aurora? What are the ionospheric signatures of dynamic geospace events (e.g., reconnection).
Geospace Dynamic Coupling e.g., how does O+ of ionospheric origin affect geospace dynamics during (e.g.,) storms? What is the role of the substorm in the storm? How do dayside conditions determine if reconnection is steady or bursty? How does the CPS stage plasma for injection into the inner magnetosphere?
Space weather affects on climate: e.g., How does auroral precipitation affect NOx and Ozone?
Space weather affects on GNSS: e.g., Develop and provide real-time assessment of space weather affects on GPS accuracy at high latitudes.
PCW
Eric Donovan January 12, 2011
Proposal – take advantage of the best geospace imaging platform in history, flown at the same time as MMS, CrossScale, RBSP, BARREL, etc. Fly…
Primary: Molniya UltraViolet Imager (MUVI)Nice to have: Energetic Neutral Atom Imager
Molniya X-ray Imager (MOXI)Spectroscopic Imager (SI)EUV Imager
Partner: Change KuaFu to a single solar/solar wind satellite; Support EAGLES.
Budget: $10M-50M
This builds on Canada’s history of space- and ground-based auroral imaging. Groundwork has been done during the CSA funded Ravens Concept Studies. This draws on established partnerships.
PCW
Eric Donovan January 12, 2011
The Ravens Concept
PCW
Eric Donovan January 12, 2011
perfect
great
good
bad
awful
Note: combined FOV of both spacecraft is always “better than good”, and often better than possible with one spacecraft. End-to-end viewing of the storm possible.
Ravens: Spacecraft 1 (red) & 2 (blue) and both (black)
PCW
Eric Donovan January 12, 2011
PCW
Eric Donovan January 12, 2011
[Assessing] User Needs
Canadian Space Environment Community LTSP Roadmap (2009)NASA Heliophysics Roadmap (2009)US Decadal SurveyLetters of SupportMission planning documents (RBSP, MMS, KuaFu, etc.)Community consultation (DASP, Chapman Conferene, etc.)
PCW
Eric Donovan January 12, 2011
Linkage to Canadian Science Objectives
[2009] Canadian Space Environment Community LTSP RoadmapWhat Physical processes control the space environment? What role does cross-scale coupling play in space environment dynamics?How are mass, energy, and momentum transported through space environments?How does structure arise in space plasmas?What are the physical processes that couple magnetospheres, ionospheres, and atmospheres?What physical processes cause terrestrial and planetary aurora?What plasma processes [sic] cause acceleration/loss of energetic particles in space environments?How does the Sun affect space environments?
Outcomes and performance goalsBe an internationally recognized contributor of forefront knowledge of the space environments around the
Earth and other solar-system bodies in which Canada has an interest. This outcome is measured in the quantity and quality of scientific publications, and frequency at which Canadian data are used in the scientific literature. Our performance goal is to rank among the top 3 in the world in terms of per-capita publication and data use.
Be an internationally respected contributor of space environment missions and/or instruments enabling such missions. This outcome is measured in the number of successfully implemented space environment experiments (including suborbital experiments). Our performance goal is to rank among the top 3 in the world in terms of such experiments on a per-capita basis.
PCW
Eric Donovan January 12, 2011
PCW
Eric Donovan January 12, 2011
From NASA 2009 Roadmap
PCW
Eric Donovan January 12, 2011
10.4. A workshop focusing on Kuafu B scientific objectives (From KuaFu Workshop Report by W. Liu)
KuaFu is a three-satellite mission aimed at fundamental understanding of solar, solar wind, and geospace processes which form and control space weather.
KuaFu scientific objectives were to be met through two sets of observations: 1) multi-channel imaging of the Sun and in-situ observation of the solar wind performed at the first Lagrange point (Kuafu A); 2) 24/7 global auroral, and ENA imaging, and supporting in-situ observations, performed by two properly phased satellites in a large polar elliptical orbit (Kuafu B). Thus combined, Kuafu would blaze the trail of system-level study of the Sun-Earth System.
As currently envisioned, Kuafu A would be developed and flown by the Chinese Academy of Sciences in 2015. The Kuafu team is of the unanimous opinion that the PCW satellites under development in Canada would have an orbit ideally suited to KuaFu B objectives, and its planned timeline would ensure a multi-year overlap with KuaFu A. Further, the PCW satellites would be three-axis stabilized, and thus provide a significantly better platform for remote sensing, particularly for global auroral imaging.
The KuaFu team urges CSA to explore using spare capacity on PCW to fly instruments to achieve some of the highest priority KuaFu B observations. The Kuafu team notes that there is presently a prolonged gap in global, high-resolution auroral imaging, and 24/7 auroral coverage envisioned by Kuafu B has never been realized before. It further considers that simultaneous FUV global auroral imaging represents a bare minimum for assessing the system-level geoeffectiveness of the solar and solar wind dynamics that will be observed by KuaFu A. As a consequence, the Kuafu team recommends 10 km nadir resolution as a key observational target, in order to resolve how turbulent plasma transport in the magnetosphere results in auroral arcs, and how the instability manifested in arc breakup trigger global storms in geospace.
PCW
Eric Donovan January 12, 2011
CDRL – Page 22
PCW
Eric Donovan January 12, 2011
provide the only global imaging in the mission timeframe deliver technical firsts (24/7, spatial resolution, etc) provide the best global scale auroral imaging to date deliver numerous scientific firsts synergy with all ILWS GeoSpace projects/obs. synergy with all Canadian GeoSpace projects/obs. provide essential input to space weather applications motivate significant technological advances provide years of visually stunning EPO material enhance Canada’s Space Science profile enhance Canada’s Arctic profile take maximum advantage of the PCW orbit/platform
GeoSpace imaging on PWC would….
PCW
Eric Donovan January 12, 2011
Thank You
PCW
Eric Donovan January 12, 2011
Extra Slides
PCW
Eric Donovan January 12, 2011
PCW
Eric Donovan January 12, 2011
Available spatial resolution: the resolution of a uniform rectangular grid used to map POLAR UVI images taken from spacecraft altitudes above 6Re.
PCW
Eric Donovan January 12, 2011
Auroral Imaging from PCW
PCW
Eric Donovan January 12, 2011
Relevance to other programs - ISRs
PCW
Eric Donovan January 12, 2011
SuperDARN
PCW
Eric Donovan January 12, 2011
Magnetometer Arrays
PCW
Eric Donovan January 12, 2011
Space Weather Applications
The arctic presents special challenges to GNSS due to ionospheric irregularities which cause position errors of tens of meters (well beyond error bounds for marine and aviation applications, for example). The large-scale scintillation regions can be thousands of kilometers in extent. PCW MUVI imaging will be used to provide RT information on the location of the ionospheric disturbances and upper bounds of GNSS error to specific users.