Motivation
- NOAA’s magnetospheric real-time disturbance field calculator was presented at 2012 ISCWSA meeting at San Antonio.
- Updated the calculator to use latest USGS 1 minute Dst
- Validation against magnetic observatory and MWD data
Geomagnetic Field
- Main field
- Convection in the outer core
- 95% of the observed strength
- Secular variation
- Data by satellite and observatories
- Crustal field
- Magnetized rocks in the crust
- Does not change with time
- Data by satellite, ship and aircrafts
- External field
- Currents in the magnetosphere and ionosphere
- Disturbance by space weather
- Upper atmospheric winds
- Data by satellite and observatories
Real-time modeling of geomagnetic field
- What is included
- Magnetospheric variations caused by space weather
- Rotation of the Earth in the magnetosphere
- Secondary magnetic fields of electric currents, induced by time-varying magnetic fields in the conducting Earth and oceans
- How
- USGS real-time Dst* index (ground observatories), backup from WDC Kyoto
- NASA solar wind measurements (ACE satellite)
- Cloud based real-time modeling
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View the entire Presentation:
Manoj Nair, Adam Woods, Arnaud Chulliat, Patrick Alken and Nir Boneh
Thanks to Stefan Maus (MagVar), Benny Poedjono (Schlumberger)