Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.
-
Upload
alberta-boyd -
Category
Documents
-
view
214 -
download
1
Transcript of Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.
![Page 1: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/1.jpg)
MODELING THE MAGNETOSPHERE
Samantha SandersCode 674Dr. David G. SibeckNASA Goddard Space Flight Center
![Page 2: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/2.jpg)
WHAT ARE WE MODELING?
Interplanetary magnetic field (IMF) How do the forces within it affect space
weather?
![Page 3: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/3.jpg)
WHAT ARE WE MODELING?
EARTH
Velocity of solar wind
y
z
x
•Many factors affect solar weather – orientation is one of them• Looking for the location of the magnetopause – the point (boundary line) between the magnetosphere and the surrounding plasma• Sun’s magnetosphere is fluid! – ripples, waves, bounces, moves
![Page 4: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/4.jpg)
THE CCMC- Provides web-based space weather models for researches to use – ultimate goal to help predict space weather
- solar, heliospheric, magnetospheric, and ionospheric models with automated requests
- produces a visualization
- Sample inputs for magnetospheric models
![Page 5: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/5.jpg)
MAGNETOSPHERIC MODELS - VARIATIONS
BATS-R-US (Block-Adaptive-Tree-Solarwind-Roe-Upwind-Scheme)
SWMF/BATS-R-US with RCM (Space Weather ModelinG Framework/BATSRUS with Rice Convection Model)
LFM-MIX (Lyon-Fedder-Mobarry model)
Goal – understand discrepancies between the models to improve prediction accuracy and efficiency
![Page 6: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/6.jpg)
MAGNETOSPHERIC MODELS – SAMPLE VISUALIZATIONS
BATS-R-US visualSWMF separate visual
LFM visual
![Page 7: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/7.jpg)
USING THE MODELS
* The various models are based on different computational modules
Example, SWMF/BATS-R-US model
![Page 8: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/8.jpg)
PREDICTION DILEMMAS
Discrepancies in calculating the magnetopause locations between the models – could lead to errors in accurately predicting space weather
Model comparison – submitting multiple runs of sample data
![Page 9: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/9.jpg)
THE SUBMISSIONS- Generate input data - LOTS of input data
- two different comparisons – one varying solar wind velocity, one adjustingthe magnetic field
- watch out for – keeping IMF values constant, increase pressure and density of field
- watch for each model’s variations in predicting magnetopause location based on magnetosphere’s behavior
![Page 10: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/10.jpg)
ANALYZING THE RESULTS - MODELS
![Page 11: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/11.jpg)
ANALYZING THE RESULTS - MODELS
![Page 12: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/12.jpg)
ANALYZING THE RESULTS - COMPARISON
Compare model results to each other – points on a simple graph
Use a line of actual observed data from a typical set
Calculated distance of model points from observed points gives margin of error for each model
![Page 13: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/13.jpg)
ANALYZING THE RESULTS - FUTURE
Work still to be done! Need more run data to complete – a
small amount of results won’t create a good line to compare with the database of observed features
Problems can occur with submissions
![Page 14: Samantha Sanders Code 674 Dr. David G. Sibeck NASA Goddard Space Flight Center.](https://reader034.fdocuments.us/reader034/viewer/2022051620/56649e0c5503460f94af45a6/html5/thumbnails/14.jpg)
ACKNOWLEDGEMENTS
Dr. David Gary Sibeck Dr. Masha Kuznetsova The Dayside Science crew Uthra Rao and Mitch Wynyk Diane Cockrell Cori Quirk and the SESI Program