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Polar HYDRA 14-sec Moments

Published by NASA Space Physics Data Facility (SPDF) Coordinated Data Analysis Web (CDAWeb) Data Services | National Aeronautics and Space Administration | Metadata Last Checked: February 21, 2026 | Last Modified: 2026-02-17
This data set from the POLAR Hot Plasma Analyzer (HYDRA) contains survey electron and proton moments for density, bulk velocity (GSM), and temperature in parallel and perpendicular directions at 13.8-second resolution as determined for s/c potential at 0-20keV. Higher quality data products may be available from the P.I. The direction designations "parallel,""perpendicular," and "antiparallel" refer to the magnetic field and indicate sample averaging over pitch-angle ranges of 0-30, 75-105, and 150-180 degrees. Reference: HYDRA is a 3-Dimensional Electron and Ion Hot Plasma Instrument for the Polar Spacecraft of the GGS Mission, J. Scudder et al., Space Sci. Rev., 71,459-495, Feb. 1995. http://www-st.physics.uiowa.edu

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