What types of reanalysis products do GEM FG9 members

would like to see in VIRBO?An informal survey

2.0 ViRBO: Addressing Community Needs

Satellite Engineers:

•Require radiation belt climatology models to design satellite systems that can withstand the radiation environment. Current models are limited by the data and physical understanding available at the time of their development.

•ViRBO will provide a centralized long-term archive of inter-calibrated measured and simulated data from which to derive new climatologies covering a wider range of geomagnetic conditions, spatial coordinates, and particle energies.

Satellite Operators:

•Need specification of current and future conditions for anticipating and quickly resolving anomalies. Operators have access to real-time NOAA GOES satellite data and one predictive model (REFM).

•ViRBO will provide near real time data from additional low altitude satellites and simulated data from physical and empirical models which fill in regions where measured data is not available.

•ViRBO will provide an integrated source of measured data allowing models to easily incorporate data assimilation.

Radiation Belt Science Community:

•Require observed and modeled data for testing theory. Physical mechanisms capable of explaining radiation belt dynamics have been proposed but not confirmed because many mechanisms can reproduce broad features. Detailed inter-comparisons are needed.

•ViRBO will support efforts to inter-calibrate satellite data and provide access to long term archives of observed and simulated data that will allow scientists to test theory by making detailed comparisons between physical models and observations.

Extended Space Physics Community

Many space physics communities face similar challenges obtaining reducing and synthesizing data.

The VxO architecture and programs developed for ViRBO will be open source, modular, flexible and adaptable so that any community can combine them and quickly build a VxO that meets their specific needs.

1.0 Introduction:

• Upsets to space operations demonstrate a need for

better scientific understanding and models.

• Before scientists can study the processes that produce belt variability, they face obstacles obtaining, reducing, and synthesizing data for analysis.

1) Not all data is publicly available. 2) Data is difficult to access, scattered amongst

different holdings, in many formats, sparsely documented, and of variable quality. Moreover, data are rarely inter-calibrated, making global, statistical, and modeling research difficult.

3) No central software repository exists, which results in individual scientists reinventing analysis code and tools.

• Satellite operators and engineers, who rely on data and model output to assess anomalies and improve satellite design, are at an even greater disadvantage because they are not tightly integrated in the community and have even less information regarding data and modeling sources.

Objective 1: To enable scientific achievement and support hazard mitigation by providing a gateway for scientists, operators, and engineers to obtain high quality, calibrated radiation belt data and model output in a unified form along with necessary analysis tools.

Objective 2: To develop a generic, extensible, open software system that will quickly allow new VxOs to be implemented for other communities faced with similar challenges.

The Virtual Radiation Belt Observatory (ViRBO)

Abstract: Aerospace engineers, satellite operators, and scientists share a common desire to understand and predict the variability of the earth’s radiation belts. Continuing upsets to the operation of space systems demonstrate the need for better specification and prediction through the use of data-driven models, improved physical understanding, and efficient transfer of scientific understanding to operations. We are developing a Virtual Radiation Belt Observatory (ViRBO). The observatory will be an open access, near real-time, and long-term archive of observed and simulated radiation belt data that enables scientific discovery and provides tools for engineers and satellite operators.

3.0 ViRBO Vision ViRBO will be supported by and promote modeling and data collection efforts currently underway at NOAA, LASP, NASA, LANL, and CISM. Each institution provides a unique data product and/or area of expertise.

Near Real Time System (Operational Users)1) Near real-time particle flux measurements received from

SAMPEX and POES low earth orbiting satellites and GOES geostationary satellites.

2) Calibrations and quality flags applied in real-time. Accurate calibrations, inter-calibrations, error bars and data quality indicators will be a priority for producing reliable models.

3) Measurements ingested into empirical and physics-based models which estimate particle flux in regions not sampled and predict future flux levels.

4) Observed and simulated data passed to user displays designed for operational use and situational awareness.

Archival system (Engineering and Scientific Users)1) Includes simulated radiation belt data on three dimensional space grids as well as observed data.1) Three datasets not currently publicly available will be targeted for inclusion in the

system; HEO DSU, GPS, CRRES MEA.2) Models will be run using more data than available in real time.3) Observed and simulated data will be used to develop climatology models.4) Observed and simulated data are passed to user displays designed for

engineering/scientific use.

R.S. Weigel, J.C. Green, E. A. Kihn, D. N. Baker, S.G. Kanekal,, R.H.W. Friedel, Paul O’Brien, and S. Bourdarie

4.0 ViRBO prototype

Searching for Data Data source descriptions are collected in the native XML database. The metadata can be created by the data provider in any format which is then translated into an internal standard.

In addition to a free-text search, users can order a searchon any field (type) supported by the metadata scheme.Users can subscribe to be notified by e-mail when newdata products arrive. Notifications can be personalizedby setting selective filters.

Creating a CommunityUsers can subscribe to a moderated news website whichwill provide important updates and announcementsregarding the observatory. In addition, comments andquestions can be posted to an open community forum.A repository with version control provides access toavailable software.

Connecting to Other CommunitiesUsers can create a personalized observatory with selected products from any virtual observatories.

DataSource

DataSource

DataSource

DataSource

Virtual Observatory

Meta DB<XML>

User

Search Metadata

SearchResult

View Data

Search Window

Notification Filters

News

Personal Observatory

NASA's Heliophysics Data Environment http://lwsde.gsfc.nasa.gov/

Responses to the Survey

• Particles

• Fields

• Indices

• Models and data products

• Divided in “primary” and “secondary”

Structure of the Reanalysis Datasets in ViRBO

• Q: How should the reanalysis datasets be structured?

• Q: Would there be some type of ordering scheme for entering them into the VxO?

• A: In analogy to GGCM, the primary reanalysis dataset(s) could form a spine.

Based on that, secondary datasets or modules could be added to fill the gaps.

Model Datasetswith Reanalysis Potential

Primary:• Magnetospheric B-field (Tsyganenko) and parameters to drive it• Ionospheric E-field (Weimer and similar)• ULF waves@GEO• Statistical plasmasphere model• Plasma @GEO (already available)• AMIE runs; AMIE PCP ΔΦPC (already available; improve access)

Secondary:• Tools for L* calculation (via tabulation or routine) given SW, Dst

• Ring current models• Self-consistent plasma sheet field (?); e.g., RCM, RCME• Plasmasphere/pause models:

– Ober– Goldstein– Gallagher– Rice minimal-version (?)– TEC-based Psphere density– Ground ULF-based Psphere density

• ULF wave power: MHD model; APL model• VLF: EMIC, Chorus power from RC model

Index datasets (several already available in ViRBO)

• Geomagnetic: Dst, Kp, AE, PC

• AFRL midnight boundary index

• ULF index

Electron DistributionMeasurements

• Flux: – Primary: CRRES, POLAR, GEO

(LANL/GOES), SAMPEX– Secondary: GPS, CLUSTER, THEMIS***

• PSD: CRRES, POLAR, GEO

• Energies: – Primary: Relativistic: >1 MeV– Secondary: Subrelativistic (30 keV, 300 keV)

Ion DistributionMeasurements

• Flux: – Primary: CRRES, POLAR, LANL, AMPTE,

ACE (SEP)– Secondary: SAMPEX

• PSD: CRRES, POLAR

• Composition (H+, O+, He++)

Field (incl. Wave) Measurements

Primary:

• ULF waves@GEO

Secondary:

• Ground pulsations