Interplanetary Shocks Observed by the DSCOVR Spacecraft

Tuesday, 15 December 2015: 11:20
2009 (Moscone West)
Andriy Koval1,2, Lynn B Wilson III1, Adam Szabo1, Justin Christophe Kasper3, Michael Louis Stevens4, Anthony W Case4 and Douglas Alan Biesecker5, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)University of Maryland Baltimore County, Baltimore, MD, United States, (3)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (4)Smithsonian Astrophysical Observatory, Cambridge, MA, United States, (5)NOAA Boulder, SWPC, Boulder, CO, United States
We are examining magnetic field fluctuations in and around interplanetary shocks observed by the DSCOVR spacecraft. The DSCOVR spacecraft, launched in February 2015 and currently in an orbit about L1, provides very high cadence measurements of the magnetic field (50 Hz) and ion velocity distribution functions (1 Hz). Observations suggest the fluctuations near the shock ramps are whistler precursors. The properties of both the precursor waves and the shock ramp structure are compared to the shock geometry and strength. The observations are compared with the observations by the Wind spacecraft, also in an orbit about L1.