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Captured 2 SS onsets in sci-orbit

Captured 2 SS onsets in sci-orbit. http://sscweb.gsfc.nasa.gov/tipsod. THEMIS. POLAR. Mar-23: Two SS onsets. THEMIS. POLAR. Mar-23: Two SS onsets. THE. FAST. THA. THB. THC. THD. Mar-23: Two SS onsets, AE. THEMIS in Fast Survey. Real-time AE available, but at risk in next 2 years

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Captured 2 SS onsets in sci-orbit

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  1. Captured 2 SS onsets in sci-orbit http://sscweb.gsfc.nasa.gov/tipsod THEMIS POLAR

  2. Mar-23: Two SS onsets THEMIS POLAR

  3. Mar-23: Two SS onsets THE FAST THA THB THC THD

  4. Mar-23: Two SS onsets, AE THEMIS in Fast Survey • Real-time AE available, but at risk in next 2 years • Collaborated with NSF to ensure its presence during THEMIS • Developing tools for inserting AE into THEMIS database

  5. TH-FGM Fast Survey Overview Mar-23: Two SS onsets, FGM THA THA-FGM Data Types Available THB FGE (8S/s) THC (leading) FGL (4S/s) THD FGH (128S/s) THE (trailing)

  6. ____ ____ ____ X: Y: Z: TH-FGL Overview THA-FGM FIT Data (3s) Available FLRs (Samson, ’92) Substorm Onset POLAR UVI/VIS Onset 10:58UT Intensifications

  7. GBO/GMAG/KIANA THC/FGL SST ESA THD/FGL • Local Intensification at Kiana • Seen at THD/B/A as: • Field aligned current • Injection, followed by: • Velocity Dispersed Ions • Can identify source in space • Can identify ground signatures SST ESA THB/FGL SST ESA THA/FGL SST ESA THE/FGL SST ESA

  8. Injection at low energies as well. ESA Ions on A/B/D/E

  9. Instrument Commissioning • ISSUES • FGM (at 2m) sees bus currents at spin tone/harmonics • Developing software solution: tone removal • Worst case effect: 0.2nT inaccuracy (does not affect science) • SCM (at 1m) also sees bus currents at spin tone/harmonics • Developing software solution: tone removal • Worst case effect: Limit use above 10Hz (use FGM below 10Hz) • SCM sees noise from BAU/IDPUat 8Hz/32Hz and harmonics • Solution demonstrated • Routine implementation ongoing

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