Skip to main content
U.S. flag

An official website of the United States government

Polar HYDRA 14-sec Moments

Published by CDAWeb | National Aeronautics and Space Administration | Catalog Last Checked: September 09, 2026 at 12:37 AM | Dataset Last Updated: September 07, 2026
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

Resources

7 resources available

Find Related Datasets

Search by Tags

Click any tag below to search for similar datasets

Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
  "026:00"
]
contactPoint 
{
  "fn": "NASA Space Physics Data Facility",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:NASA-SPDF-Support@nasa.onmicrosoft.com"
}
description 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
distribution 
[
  {
    "@type": "dcat:Distribution",
    "format": "BIN",
    "mediaType": "application/octet-stream",
    "downloadURL": "ftps://spdf.gsfc.nasa.gov/pub/data/polar/hydra/moments-14sec/"
  },
  {
    "@type": "dcat:Distribution",
    "format": "BIN",
    "mediaType": "application/octet-stream",
    "downloadURL": "https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=POLAR_HYDRA_MOMENTS-14SEC&index=sp_phys"
  },
  {
    "@type": "dcat:Distribution",
    "format": "BIN",
    "mediaType": "application/octet-stream",
    "downloadURL": "https://cdaweb.gsfc.nasa.gov/hapi"
  },
  {
    "@type": "dcat:Distribution",
    "format": "BIN",
    "mediaType": "application/octet-stream",
    "downloadURL": "https://helio.data.nasa.gov/dataset/POLAR_HYDRA_Moments_PT14S"
  },
  {
    "@type": "dcat:Distribution",
    "format": "BIN",
    "mediaType": "application/octet-stream",
    "downloadURL": "https://hpde.io/NASA/NumericalData/POLAR/HYDRA/Moments/PT14S"
  },
  {
    "@type": "dcat:Distribution",
    "format": "BIN",
    "mediaType": "application/octet-stream",
    "downloadURL": "https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1996-013A-03"
  },
  {
    "@type": "dcat:Distribution",
    "format": "BIN",
    "mediaType": "application/octet-stream",
    "downloadURL": "https://spdf.gsfc.nasa.gov/pub/data/polar/hydra/moments-14sec/"
  }
]
identifier https://doi.org/10.48322/gvf7-x480
keyword 
[
  "energeticparticles"
]
landingPage https://doi.org/10.48322/gvf7-x480
license https://www.usa.gov/government-works
modified 2026-09-07
programCode 
[
  "026:000"
]
publisher 
{
  "name": "CDAWeb",
  "@type": "org:Organization"
}
theme 
[
  "Heliophysics"
]
title Polar HYDRA 14-sec Moments

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov