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Standardization Process for Space Radiation Models Used for Space System Design

Janet Barth, NASNGSFC Eamonn Daly, ESNESTEC

Donald Brautigam, AFRLNSSE

Space Weather Week April 5-8, 2005

Introduction

The space system design community has three concerns related to models of the radiation belts and plasma: - AP-8 and AE-8 models are not adequate for modern

applications; - Data that have become available since the creation of

AP-8 and AE-8 are not being fully exploited for modeling purposes;

- When new models are produced, there is no authorizing organization identified to evaluate the models or their datasets for accuracy and robustness.

2 'Slardardizaion Process for Space Radialion Models Ured for S p m System w i n ' psemed by Janet L Barlh al NOAA Space Weather Week ( S W ) . Boulder. CO.. April 5-8.2w5

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https://ntrs.nasa.gov/search.jsp?R=20050180625 2018-05-25T13:11:48+00:00Z

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The Radiation Environment

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Nikkei Science, Inc. of Japan, by K. Endo

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Trapped Proton & Electron Intensities

AP-8 Model AE-8 Model

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Missions in Space Radiation Environments

Scientific Research - Space science

. - Earthscience - Human exploration of space - Aeronautics and space

transportation Navigation Telecommunications Defense Space Environment Monitoring Terrestrial Weather Monitoring

"Slandaniizaion Pmcess for Space Radkabon Mod& Used for Space System Deslgn' piesented by Janet L BaRh at NOAA Space Weathw Week ( S W ) Boulder CO Apnl68 2025

=

i Space Environment Model Use in

Mission Life Cycle

Mission Concept

Mission Planning

Design J Space Weather

Manage Residual Risk Operations

Anomaly Resolution - +

in situ measurements

mSlandadili*mn P- for Space Radiabon Models Used for Space Sv~tem Des~n- PreSMed by Janet L BaRh at N O M Spwe Weather Week ( S W ) . BOMw, CO , Apll5-8.2QQ5

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The Call for New Space “Climate” Models

Identified by US Space Architect as a gap in the US Space Weather Program Identified by the US Space Technology Alliance’s Space Environments and Effects Working Group as the #I priority in space environments issues Identified in ESA R&D Roadmaps Why? - Required by engineers to build better spacecraft in

operation phases; - Used to support operational planning and on-orbit anomaly

investigations; - Need for quantitative dynamic model of electron belt flux is

the #I environment concern for astronauts on ISS (Golighfly, L WS User Requirements Workshop, 2000);

- Need improved models for safe passage of astronauts and their vehicles through the radiation belts.

‘standsrdizaion P- fof Spaw Radiatan Models Used for Space SyJtem Design- 7 pnaaed by Jane( L Barn at NOAA SpaQ W e Week ( S W ) . Boulder. CO.. Apnl5-8.2005

Working Group Meeting on New Standard Radiation Belt and Space Plasma Models

Working Group meeting was held on 5-8 October 2004 Included representatives from science, modeling, and user communities Goals - Report and document recent rogress

on radiation belt model and p f k a model development

- Com lete a roadmap for the deveropment of new standard radiation belt and space plasma models for spacecraft engineering

Input to agencies for future investments Interagency cooperation

Organizing Committee - Janet BarthlNASA - Chair - Don BrautigamlAFRL - Bern BlakelAerospace - Eamonn DalylESA

Metrics for past and current programs

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‘Wndarduamn Prccess for Space Radiabon Models Used for Space System Dewgn’ 8 presented by J a m L Earth at NOPA Space Weather Week (SWW). Bower. CO , Apnl5-8,2005

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Working Group Panels

Four Panels met to develop roadmaps - Plasma environments in the

magnetosphere

magnetosphere

magnetosphere

model standardization

* Chair: Michele TompsenlLANL - Protons trapped in the

- Electrons trapped in the

* Chair: Bern BlakelAerospace - Flight dataset verification and

* Chair: Eamonn DalylESA

- Chair: Daniel HeyndriyxlBlRA

P processes

9 are the result of the need for Model standardization activities

industry to have authorized models for space system design.

9 'Sfandardiraimn PIUCESS for Space Radiabn Mod& Used for Space System W n ' presented by Janet L. Earth at NOAA Space Weather Week (SWW). Eamer. CO.. Am1 5-8.2005

Panel 4: Examination of Existing Capability

COSPAR Panel on Standard Radiation Belts (PSRB) - Chair: Bourdarie, S. (France), 2004 - 2008

Daly, E. J. (ESNESTEC), 2002 - 2006 Fung, S. F. (USA), 2002 - 2006 Panasyuk, M. 1. (Russia), 2002 - 2006

vice-Chairs:

- Terms of Reference: The Panel was established to develop a standard model of the Earth's trapped radiation belts. The model should be based on experimental data using all available space data sources, while theoretical considerations will serve to guarantee optimal model construction and use, and internal consistency. The functionality of the model should be defined in terms of the needs of the user communit Guidelines should be defined for developing standardised radiation monitors. hhere discrepancies exist between different data sources, the PSRB should promote critical discussion to establish the quality of the data sets. The model should be updated as new data become available and as old d.ata bases are fully evaluated and exploited. A liaison should be established and maintained with the international scientific and space engineering communities, such as the IACG and IS0 TC20/SC14MIG14, in order to ensure the availability and usability of data and models for radiation belt modelling and to encourage the sharing of modelling expertise.

I S 0 TC201SC14MIG4 Space Environment (Natural & Artificial) - WG4 Convenor: Prof. M. 1. Panasyuk

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Datasets and Modeling Standardization Roadmap (112)

PSRB owns the process of dataset acceptance and modeling acceptance; supports IS0 standardization; Update panel membership; Define acceptance criteria for datasets: - It is a PSRB task, but shall include (type, error bars, pre-flight calibration

history, simulation, documentation, in-flight calibr. (e.g. conjunctions), coordinate system);

- Datasets shall be made available to a sub-panel (peer review); report back to PSRB;

- PI should be involved in the process and compare data. Issue calls for modeling datasets to feed the above Initiate in PSRB modeling “tasks” (decide today) and issue modeling calls (parallel); Define modeling acceptance criteria (handling propagation of errors, responding to user requirements, validation process, development timescale,. . .);

‘Standafdiabn P- for Space Radiation Mcdds Used for Space Sysem Oesign’ 11 m e d by J a m L Earth at NOAA Space W e Week (SWW). Bodclef. CO.. A w l 5-8.2M)5

at aset s and Model i ng Standardization Roadmap (2/2)

Resulting draft model shall be put in public domain for evaluation (peers, industry); User community shall be part of the process; Test the IS0 process: prepare a low-altitude proton model along these lines now, and generate an IS0 New Work kern simultaneously; POLE electron model can also be done now in this process; other electron models later; Prepare a “process standard” via PSRB as an IS0 activity - datasets and model characteristics; PRSB to meet before next COSPAR (China, 2006); IS0 WG4 mtg. TBD + Toulouse 2005; Access methods, formats and support. PSRB discussion but not seen as a problem; The resources required are large, est. POLE -1my; LAPM -2my; others ... The calls: Joint NASA+ESA+XYZ.

’StandardiZam Pmcess for Space Rahabon Models Used for Space System W n ‘ 12 presented by Janet L Banh at NOM Space Weather Week (SWW). Boulder. CO , Apnl68, 2M)5

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Two Models Recommended for Standardization

Initiated as tasks in PSRB POLE (Particle ONERA-LANL Environment) for geostationary orbits - Data sets: CPA and SOPA

Electron Model

Low Altitude Proton (LAP) Model based on TPM-1ISAIC and PSB97IESA - Data sets: TIROS, CRRES, SAMPEX

13 'Standadizaon Pmcess for Space Radiatbn Modas Used for Space System Dewpn' presentd by Janet L. Barth at NOM Space Wealher Week (SWW). Boulder. CO , Apnl5-8. Mo5

1.H10

1.W8 - z E f 1.EI.06 E

6 1.W7

F 1.WS

z

a ii = 1.- - L

m & 1.W3

1.W2

1.W1

1 . W 0.01

Comparison of POLE, AE-8 _ _ ~ ~ -

- -A- - POLE Ave Sol Min - AE-8 Sol Max

0.1 1

Energy (MeV)

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14 'Standaaizatwn Pmcess for Space Radimn Modas Used for Space System Dewgn" presented by J a m L BaRh at NOAA Space Weathef Week (SWW). Bouldw. CO , Apnl5-8. Mo5

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Comparison of TPM-1, PSB97, AP-8

..

- -e - TPMl Quiet Sol Mn '. -TPM1 Quiet Sol Mx - -PSB97SolMn - -m - AP-8Sd Mn - - AP-8 Sd h b ~

, b

0.001 4 1 10 Energy(MeV) 100 1000

"Standardiratii Pmc~as for Space Radiafion Mcdds Used for Space System Desipn' presented by Janet L Earth al NOAA Space Wealher Week (SWW). Bobider. GO., Apnl5-8,2005

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Dataset Management Issues

Need to break through the funding "Catch-22'' - Radiation belt and plasma modeling not considered a science

activity, But ... - Experimental space scientists must be a significant part of the

modeling effort Acceptance process must be part of standardization activity. Need ancillarylmeta data (calibration, simulation, performance, ...) Need data access tools for users/modellers/validators/reviewers Format? - Raw + software vs. processed - Use of existing ventures (CSDS, CAA, CCMC, SEDAT, ...) 7

Need documentation of process of model generation from data Distribution - Distributed vs. data center - Access and restriction

3andarduaion Ptccess for Space Radatlon Models Used for space system Des~gn. presented by Janet L Banh at NOAA Space Weatha Week (SWW). Boulder. CO , Apnl5-8.2005

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Summary

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Lack of Space “Climate” models is seen as a gap in Space Weather capability. Industry has a clear need for a model standardization process. Good tools and processes for comparing other modelslimplementations (i.e. benchmarking) needed. Modular, “bite-sized” approach encouraged for new model development. Strong version control on datasets, metadata, and models id required. Manpower!

Products should be defined pre-flight. Need more meetings of the PSRB panel.

- Modeling activities for Space “Climate” models are not embraced by either the science or engineering communities.

17 Smd&k+m Rocess for Space RaMdbn W s UJed for Space System Design’ presented by Janet L. Batih at NCXA Space WeaMer Week (SWW). &Adder. CO , Awl 58.2w5

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