CDAWeb Served Heliophysics Datasets Beginning with 'O'

OMNI2_H0_MRG1HR: OMNI Combined, Definitive, Hourly IMF and Plasma Data, and Energetic Proton Fluxes, Time-Shifted to the Nose of the Earth's Bow Shock, plus Solar and Magnetic Indices - J.H. King, N. Papitashvili (ADNET, NASA GSFC)

OMNI_COHO1HR_MERGED_MAG_PLASMA: OMNI Combined merged hourly magnetic field, plasma and ephermis data - J.H. King, N. Papatashvilli (AdnetSystems, NASA GSFC)

OMNI_HRO2_1MIN: OMNI Combined, Definitive 1-minute IMF and Definitive Plasma Data Time-Shifted to the Nose of the Earth's Bow Shock, plus Magnetic Indices - J.H. King, N. Papatashvilli (AdnetSystems, NASA GSFC)

OMNI_HRO2_5MIN: OMNI Combined, Definitive 5-minute IMF and Definitive Plasma, and Energetic Proton Fluxes, Time-Shifted to the Nose of the Earth's Bow Shock, plus Magnetic Indices - J.H. King, N. Papatashvilli (AdnetSystems, NASA GSFC)

OMNI_HRO_1MIN: OMNI Combined, Definitive, 1-minute IMF and Plasma Data Time-Shifted to the Nose of the Earth's Bow Shock, plus Magnetic Indices - J.H. King, N. Papatashvilli (AdnetSystems, NASA GSFC)

OMNI_HRO_5MIN: OMNI Combined, Definitive, 5-minute IMF and Plasma, and Energetic Proton Fluxes, Time-Shifted to the Nose of the Earth's Bow Shock, plus Magnetic Indices - J.H. King, N. Papatashvilli (AdnetSystems, NASA GSFC)

OMNI2_H0_MRG1HR doi:10.48322/1shr-ht18 Copy BibTeX Citation

Description

Hourly averaged definitive multispacecraft interplanetary parameters data
OMNI Data Documentation: https://omniweb.gsfc.nasa.gov/html/ow_data.html 
Additional data access options available at  SPDF's OMNIWeb Service:
https://omniweb.gsfc.nasa.gov/ow.html
COHOWeb-formatted OMNI_M merged magnetic field and plasma data
http://cohoweb.gsfc.nasa.gov/
Recent OMNI 1-HR Updates News: https://omniweb.gsfc.nasa.gov/html/ow_news.html 
Data variables with 1800 in their names use time stamps on the half-hour (1800
seconds) to reflect the mid-point of the hourly data, and are tied to the
EPOCH_1800 time variables

Modification History

created August 2003;
conversion to ISTP/IACG CDFs via SKTEditor Feb 2000
2024 Sept: changed real variables back to VAR_TYPE=data

• Data Variable Descriptions
  Bartels Rotation Number (half-hour midpoint) [Rot1800]
  OMNI ID code for the source spacecraft for time-shifted IMF values (see OMNI documentation link for codes) (half-hour midpoint) [IMF1800]
  OMNI ID code for the source spacecraft for time-shifted IP plasma values (see OMNI documentation link for codes) (half-hour midpoint) [PLS1800]
  # fine time scale IMF points (half-hour midpoint) [IMF_PTS1800]
  # fine time scale plasma points (half-hour midpoint) [PLS_PTS1800]
  1AU IP Average B Field Magnitude, nT, (last currently-available OMNI B-field data Jun 23, 2026) (half-hour midpoint) [ABS_B1800]
  1AU IP Magnitude of average field vector (nT) (half-hour midpoint) [F1800]
  1AU IP Latitude/Theta of average B vector (deg) (half-hour midpoint) [THETA_AV1800]
  1AU IP Longitude/Phi of average B vector (deg) (half-hour midpoint) [PHI_AV1800]
  1AU IP Bx (nT), GSE (half-hour midpoint) [BX_GSE1800]
  1AU IP By (nT), GSE (half-hour midpoint) [BY_GSE1800]
  1AU IP Bz (nT), GSE (half-hour midpoint) [BZ_GSE1800]
  1AU IP By (nT), GSM (half-hour midpoint) [BY_GSM1800]
  1AU IP Bz (nT), GSM (half-hour midpoint) [BZ_GSM1800]
  RMS deviation of average B magnitude (nT) (half-hour midpoint) [SIGMA-ABS_B1800]
  RMS deviation of magnitude of the average vector field (nT) (half-hour midpoint) [SIGMA-B1800]
  RMS deviation Bx (nT), GSE (half-hour midpoint) [SIGMA-Bx1800]
  RMS deviation By (nT), GSE (half-hour midpoint) [SIGMA-By1800]
  RMS deviation Bz (nT), GSE (half-hour midpoint) [SIGMA-Bz1800]
  1AU IP Plasma Temperature, deg K, (last currently-available OMNI plasma data Jul 06, 2026) (half-hour midpoint) [T1800]
  1AU IP Ion number density (per cc) (half-hour midpoint) [N1800]
  1AU IP plasma flow speed (km/s) (half-hour midpoint) [V1800]
  1AU IP plasma flow direction longitude (deg), phi (half-hour midpoint) [PHI-V1800]
  1AU IP plasma flow direction latitude (deg), theta (half-hour midpoint) [THETA-V1800]
  1AU IP Alpha/proton ratio (half-hour midpoint) [Ratio1800]
  1AU IP Flow pressure (nPa) (half-hour midpoint) [Pressure1800]
  RMS deviation of plasma temperature (deg k) (half-hour midpoint) [SIGMA-T1800]
  RMS deviation of ion number density (per cc) (half-hour midpoint) [SIGMA-N1800]
  RMS deviation in plasma flow velocity (km/s) (half-hour midpoint) [SIGMA-V1800]
  RMS deviation in plasma flow direction longitude (deg), phi (half-hour midpoint) [SIGMA-PHI-V1800]
  RMS deviation in plasma flow direction latitude (deg), theta (half-hour midpoint) [SIGMA-THETA-V1800]
  RMS deviation alpha/proton ratio (half-hour midpoint) [SIGMA-ratio1800]
  1AU IP Electric Field (mV/m) (half-hour midpoint) [E1800]
  1AU IP Plasma beta (half-hour midpoint) [Beta1800]
  1AU IP Alfven mach number (half-hour midpoint) [Mach_num1800]
  1AU IP Magnetosonic mach number (half-hour midpoint) [Mgs_mach_num1800]

  Derived parameters are obtained from the following equations. Magnetosonic Mach
  number = V/Magnetosonic_speedMagnetosonic speed = [(sound speed)**2 + (Alfv
  speed)**2]**0.5The Alfven speed = 20. * B / N**0.5The sound speed = 0.12 * [T +
  1.28*10**5]**0.5
  

  1AU Proton flux > 1 MeV, 1/(SQcm-ster-s), (last currently-available OMNI proton fluxes Mar 04, 2020) (half-hour midpoint) [PR-FLX_11800]
  1AU Proton flux >2 MeV (1/(SQcm-ster-s)) (half-hour midpoint) [PR-FLX_21800]
  1AU Proton flux >4 MeV (1/(SQcm-ster-s)) (half-hour midpoint) [PR-FLX_41800]
  1AU Proton flux >10 MeV (1/(SQcm-ster-s)) (half-hour midpoint) [PR-FLX_101800]
  1AU Proton flux >30 MeV (1/(SQcm-ster-s)) (half-hour midpoint) [PR-FLX_301800]
  1AU Proton flux >60 MeV (1/(SQcm-ster-s)) (half-hour midpoint) [PR-FLX_601800]
  Magnetospheric Contamination of 1AU Proton Flux code (6=No,<=5 see OMNI documentation) (half-hour midpoint) [MFLX1800]
  Daily sunspot number V2, from http://sidc.oma.be/silso/datafiles/ (1963/001-2026/181) (half-hour midpoint) [R1800]
  F10.7 - Daily 10.7 cm solar radio flux, units: 10**(-22) Joules/second/square-meter/Hertz, from NGDC (1963/001-2026/190), (half-hour midpoint) [F10_INDEX1800]
  Kp - 3-hour Kp*10 (Kp=1-,1,1+ corresponds to 7,10,13), fromNGDC (1963/001-2026/190) (half-hour midpoint) [KP1800]
  Dst - 1-hour Dst index (1963/001-2014/366), Provisional Dst (2021/001-2026/120), Quick-look Dst (2026/121-2026/190), from WDC Kyoto (half-hour midpoint) [DST1800]
  AE - 1-hour AE-index,from WDC Kyoto (1963/001-1988/182), Provisional (1990/001-2020/365), from WDC Kyoto (half-hour midpoint) [AE1800]
  ap - 3-hour ap-index (1963/001-2026/190), from NGDC (half-hour midpoint) [AP_INDEX1800]
  AL - 1-hour AL-index, from WDC Kyoto (1963/001-1988/182), Provisional (1990/001-2018/059), from WDC Kyoto (half-hour midpoint) [AL_INDEX1800]
  AU - 1-hour AU-index,from WDC Kyoto (1963/001-1988/182), Provisional (1990/001-2018/059), from WDC Kyoto (half-hour midpoint) [AU_INDEX1800]
  PC - 1-hour Polar Cap index (North, Thule station), from NGDC (Final 1975/001-2024/365) (half-hour midpoint) [PC_N_INDEX1800]
  Solar Lyman-alpha (1963/001-2026/189) (half-hour midpoint) [Solar_Lyman_alpha1800]
  Solar wind (magnetic energy density)/(kinetic energy density) (half-hour midpoint) [Proton_QI1800]

OMNI_COHO1HR_MERGED_MAG_PLASMA doi:10.48322/6ffx-3441 Copy BibTeX Citation
Proper citations should include the "Accessed on date" in the form .

Description

Hourly averaged definitive multispacecraft interplanetary parameters data
The Heliographic Inertial (HGI) coordinates are Sun-centered and inertially
fixed with respect to an X-axis directed along the intersection line of the
ecliptic and solar equatorial  planes. The solar equator plane is inclined at
7.25 degrees from the ecliptic. This direction was towards ecliptic longitude of
74.367 degrees on 1 January 1900 at 1200 UT; because of precession of the
celestial equator, this longitude increases by 1.4 degrees/century. The Z axis 
is  directed perpendicular and northward from the solar equator, and the Y-axis
completes the right-handed set. This system differs from the usual heliographic
coordinates (e.g. Carrington longitudes) which are fixed in the frame of the
rotating Sun.
The RTN system is fixed at a spacecraft (or the planet). The R axis is directed
radially away from the Sun, the T axis is the cross product of the solar
rotation axis and the R axis, and the N axis is the cross product of the R and T
axes.  At zero heliographic latitude, when the spacecraft is in the solar
equatorial plane, the N and solar rotation axes are parallel.
Latitude and longitude angles of solar wind plasma flow are generally measured 
from the radius vector away from the Sun. In all cases, latitude angles are
positive for north-going flow.  The flow longitude angles have been treated
differently for the near-Earth data, i.e. the OMNI, and for the deep space data.
The flow is positive for the  near-Earth data when coming from the right side of
the Sun as viewed  from  the Earth, i.e. flowing toward +Y from -X GSE or
opposite to the direction of planetary motion. On the other hand, the flow
longitudes for the deep space spacecraft use the opposite sign convection, i.e.
positive for flow in the +T direction in the RTN system.

Modification History

created July 2007;
conversion to ISTP/IACG CDFs via SKTEditor Feb 2000
Time tags in CDAWeb version were modified in March 2005 to use the
CDAWeb convention of having mid-average time tags rather than OMNI's
original convention of start-of-average time tags.

• Data Variable Descriptions
  HelioGraphic Inertial (HGI) latitude [heliographicLatitude]
  HGI longitude [heliographicLongitude]
  BR in RTN (Radial-Tangential-Normal) coordinate system [BR]
  BT in RTN coordinate system [BT]
  BN in RTN coordinate system [BN]
  Field Magnitude Average |B 1/N SUM |B| [ABS_B]
  Bulk Flow Speed [V]
  Proton flow elevation angle / latitude (RTN) [elevAngle]
  Proton flow azimuth angle / longitude (RTN) [azimuthAngle]
  Ion Density [N]
  Temperature [T]

OMNI_HRO2_1MIN doi:10.48322/mj0k-fq60 Copy BibTeX Citation
Proper citations should include the "Accessed on date" in the form .

Description

1minute averaged definitive multispacecraft interplanetary parameters data
Additional information for all parameters are available from OMNI Data
Documentation: https://omniweb.gsfc.nasa.gov/html/HROdocum.html 
Additional data access options available at  SPDF's OMNIWeb Service:
https://omniweb.gsfc.nasa.gov/ow_min.html
Recent omni high resolution updates Release Notes:
https://omniweb.gsfc.nasa.gov/html/hro_news.html
Time stamps are for the beginning of each data averaging time bin.

Modification History

created September 2019;
conversion to ISTP/IACG CDFs via SKTEditor Feb 2000
Near-Earth Heliosphere Data (OMNI) 1minute averaged definitive multispacecraft
interplanetary parameters data.  Additional information for all parameters are
available from OMNI Data Documentation:
https://omniweb.gsfc.nasa.gov/html/HROdocum.html New data may be accesible at 
SPDFs OMNIWeb Service: https://omniweb.gsfc.nasa.gov/ow_min.html Created 
September 2019; conversion to ISTP/IACG CDFs via SKTEditor Feb 2000 Time tags in
CDAWeb version were modified in March 2005 to use the CDAWeb convention of
having mid-average time tags rather than OMNI original convention of
start-of-average time tags. The Modified (Level-3) High Resolution OMNI data
files are made in the same format as the omni files based on SWE_KP data.  There
are a few differences  between old and new high res. OMNI 1. In the new,
modified Level-3 OMNI data files we used the Wind/SWE plasma definitive data
rather than the Wind/SWE plasma KP-despiked data. Using the definitive data give
us possibility to include the Alpha/Proton Density Ratio and use more accurate
plasma parameters.  However, the time coverage in the new OMNI data was
decreased by 2-10% - see the data description at our FTP site at
https://spdf.gsfc.nasa.gov/pub/data/omni/high_res_omni/modified/. For detail
comparison 1-min. SWE definitive and cross-normalized SWE_KP data sets see
https://omniweb.gsfc.nasa.gov/ftpbrowser/wind_pla_def_kp_norm.html.  2. To keep
the number of words and the records length the same as in the old OMNI high
resolution data set we replaced the PCN-index (word #45 ) in the records with
the new Alpha/Proton Density Ratio parameter.  3. The latest date for these new
data usually behind of the OMNI based on SWE_KP data.
2024 Sept: Added BIN_LOCATION attributes

• Data Variable Descriptions
  OMNI ID code for the source spacecraft for time-shifted IMF values (see OMNI documentation link for codes) [IMF]

  The following spacecraft ID's are used: ACE 71, Geotail 60, IMP 8 50, Wind 51 
  

  OMNI ID code for the source spacecraft for time-shifted IP plasma values (see OMNI documentation link for codes) [PLS]

  The following spacecraft ID's are used: ACE 71, Geotail 60, IMP 8 50, Wind 51 
  

  Number of fine time scale points in IMF averages [IMF_PTS]
  Number of fine time scale points in plasma averages [PLS_PTS]
  Percent interpolated [percent_interp]

  The percent (0-100) of the points contributing to the 1-min magnetic field
  averages whose phase front normal (PFN) was interpolated because neither the
  MVAB-0 nor Cross Product shift techniques yielded a PFN that satisfied its
  respective tests.
  

  Timeshift (seconds) [Timeshift]
  RMS Timeshift (seconds) [RMS_Timeshift]
  RMS, Phase front normal (nT) [RMS_phase]

  Note that standard deviations for the two vectors are given as the square roots
  of the sum of squares of the standard deviations in the component averages.  The
  component averages are given in the records but not their individual standard
  deviations. There are no phase front normal standard deviations in the 5-min
  records.  This word has fill (99.99) for such records.
  

  Time between observations (seconds) [Time_btwn_obs]
  Magnitude of avg. field vector (nT) (last currently-available OMNI B-field data Apr 12, 2026) [F]
  Bx (nT), GSE [BX_GSE]
  By (nT), GSE [BY_GSE]
  Bz (nT), GSE [BZ_GSE]
  By (nT), GSM, determined from post-shift GSE components [BY_GSM]
  Bz (nT), GSM, determined from post-shift GSE components [BZ_GSM]
  RMS SD B scalar (nT) [RMS_SD_B]
  RMS SD field vector (nT) [RMS_SD_fld_vec]

  Note that standard deviations for the two vectors are given as the square roots
  of the sum of squares of the standard deviations in the component averages.  The
  component averages are given in the records but not their individual standard
  deviations.
  

  Flow Speed (km/s), GSE [flow_speed]
  Vx Velocity (km/s), GSE [Vx]
  Vy Velocity (km/s), GSE [Vy]
  Vz Velocity (km/s), GSE [Vz]
  Proton density (n/cc) (last currently-available OMNI plasma data Apr 12, 2026) [proton_density]
  Temperature (K) [T]
  Alpha/Proton Density Ratio [NaNp_Ratio]

  The new parameter Na/Np Ratio is included using Wind SWE definitive data.
  

  Flow pressure (nPa) [Pressure]

  Derived parameters are obtained from the following equations. Flow pressure =
  (2*10**-6)*Np*Vp**2 nPa (Np in cm**-3, Vp in km/s, subscript p for proton) 
  

  Electric Field (mV/m) [E]

  Derived parameters are obtained from the following equations. Electric field =
  -V(km/s) * Bz (nT; GSM) * 10**-3 
  

  Plasma beta [Beta]

  Derived parameters are obtained from the following equations. Plasma beta =
  [(T*4.16/10**5) + 5.34] * Np / B**2 (B in nT) 
  

  Alfven mach number [Mach_num]

  Derived parameters are obtained from the following equations. Alfven Mach number
  = (V * Np**0.5) / 20 * B
  

  1AU IP Magnetosonic mach number [Mgs_mach_num]

  Derived parameters are obtained from the following equations. Magnetosonic Mach
  number = V/Magnetosonic_speedMagnetosonic speed = [(sound speed)**2 + (Alfv
  speed)**2]**0.5The Alfven speed = 20. * B / N**0.5The sound speed = 0.12 * [T +
  1.28*10**5]**0.5
  

  X s/c (Re), GSE [x]
  Y s/c (Re), GSE [y]
  Z s/c (Re), GSE [z]
  Bow Shock Nose (Re) location, X, GSE [BSN_x]
  Bow Shock Nose (Re) location, Y, GSE [BSN_y]
  Bow Shock Nose (Re) location, Z, GSE [BSN_z]
  AE - 1-minute AE-index, from WDC Kyoto (Final 1988/001-1988/182, Provisional 1990/001-2020/365) [AE_INDEX]
  AL - 1-minute AL-index, from WDC Kyoto (Final 1988/001-1988/182, Provisional 1990/001-2020/365) [AL_INDEX]
  AU - 1-minute AU-index,from WDC Kyoto (Final 1988/001-1988/182, Provisional 1990/001-2020/365) [AU_INDEX]
  SYM/D - 1-minute SYM/D index,from WDC Kyoto (1981/001-2026/090) [SYM_D]
  SYM/H - 1-minute SYM/H index,from WDC Kyoto (1981/001-2026/090) [SYM_H]
  ASY/D - 1-minute ASY/D index,from WDC Kyoto (1981/001-2026/090) [ASY_D]
  ASY/H - 1-minute ASY/H index,from WDC Kyoto (1981/001-2026/090) [ASY_H]

OMNI_HRO2_5MIN doi:10.48322/hkaw-ff03 Copy BibTeX Citation
Proper citations should include the "Accessed on date" in the form .

Description

5minute averaged definitive multispacecraft interplanetary parameters data
Additional information for all parameters are available from OMNI Data
Documentation: https://omniweb.gsfc.nasa.gov/html/HROdocum.html 
Additional data access options available at  SPDF's OMNIWeb Service:
https://omniweb.gsfc.nasa.gov/ow_min.html
Recent omni high resolution updates Release Notes:
https://omniweb.gsfc.nasa.gov/html/hro_news.html
Time stamps are for the beginning of each data averaging time bin.

Modification History

created September 2019;
conversion to ISTP/IACG CDFs via SKTEditor Feb 2000
Near-Earth Heliosphere Data (OMNI) 5minute averaged definitive multispacecraft
interplanetary parameters data.  Additional information for all parameters are
available from OMNI Data Documentation:
https://omniweb.gsfc.nasa.gov/html/HROdocum.html New data may be accesible at 
SPDFs OMNIWeb Service: https://omniweb.gsfc.nasa.gov/ow_min.html Created 
September 2019; conversion to ISTP/IACG CDFs via SKTEditor Feb 2000 Time tags in
CDAWeb version were modified in March 2005 to use the CDAWeb convention of
having mid-average time tags rather than OMNI original convention of
start-of-average time tags. The Modified (Level-3) High Resolution OMNI data
files are made in the same format as the omni files based on SWE_KP data.  There
are a few differences  between old and new high res. OMNI 1. In the new,
modified Level-3 OMNI data files we used the Wind/SWE plasma definitive data
rather than the Wind/SWE plasma KP-despiked data. Using the definitive data give
us possibility to include the Alpha/Proton Density Ratio and use more accurate
plasma parameters.  However, the time coverage in the new OMNI data was
decreased by 2-10% - see the data description at our FTP site at
https://spdf.gsfc.nasa.gov/pub/data/omni/high_res_omni/modified/. For detail
comparison 1-min. SWE definitive and cross-normalized SWE_KP data sets see
https://omniweb.gsfc.nasa.gov/ftpbrowser/wind_pla_def_kp_norm.html.  2. To keep
the number of words and the records length the same as in the old OMNI high
resolution data set we replaced the PCN-index (word #45 ) in the records with
the new Alpha/Proton Density Ratio parameter.  3. The latest date for these new
data usually behind of the OMNI based on SWE_KP data.
2024 Sept: Added BIN_LOCATION attributes

• Data Variable Descriptions
  OMNI ID code for the source spacecraft for time-shifted IMF values (see OMNI documentation link for codes) [IMF]

  The following spacecraft ID's are used: ACE 71, Geotail 60, IMP 8 50, Wind 51 
  

  OMNI ID code for the source spacecraft for time-shifted IP plasma values (see OMNI documentation link for codes) [PLS]

  The following spacecraft ID's are used: ACE 71, Geotail 60, IMP 8 50, Wind 51 
  

  Number of fine time scale points in IMF averages [IMF_PTS]
  Number of fine time scale points in plasma averages [PLS_PTS]
  Percent interpolated [percent_interp]

  The percent (0-100) of the points contributing to the 1-min magnetic field
  averages whose phase front normal (PFN) was interpolated because neither the
  MVAB-0 nor Cross Product shift techniques yielded a PFN that satisfied its
  respective tests.
  

  Timeshift (seconds) [Timeshift]
  RMS Timeshift (seconds) [RMS_Timeshift]
  Time between observations (seconds) [Time_btwn_obs]
  Magnitude of avg. field vector (nT) (last currently-available OMNI B-field data Apr 12, 2026) [F]
  Bx (nT), GSE [BX_GSE]
  By (nT), GSE [BY_GSE]
  Bz (nT), GSE [BZ_GSE]
  By (nT), GSM, determined from post-shift GSE components [BY_GSM]
  Bz (nT), GSM, determined from post-shift GSE components [BZ_GSM]
  RMS SD B scalar (nT) [RMS_SD_B]
  RMS SD field vector (nT) [RMS_SD_fld_vec]

  Note that standard deviations for the two vectors are given as the square roots
  of the sum of squares of the standard deviations in the component averages.  The
  component averages are given in the records but not their individual standard
  deviations.
  

  Flow Speed (km/s), GSE [flow_speed]
  Vx Velocity (km/s), GSE [Vx]
  Vy Velocity (km/s), GSE [Vy]
  Vz Velocity (km/s), GSE [Vz]
  Proton density (n/cc) (last currently-available OMNI plasma data Apr 12, 2026) [proton_density]
  Temperature (K) [T]
  Alpha/Proton Density Ratio [NaNp_Ratio]

  The new parameter Na/Np Ratio is included using Wind SWE definitive data.
  

  Flow pressure (nPa) [Pressure]

  Derived parameters are obtained from the following equations. Flow pressure =
  (2*10**-6)*Np*Vp**2 nPa (Np in cm**-3, Vp in km/s, subscript p for proton) 
  

  Electric Field (mV/m) [E]

  Derived parameters are obtained from the following equations. Electric field =
  -V(km/s) * Bz (nT; GSM) * 10**-3 
  

  Plasma beta [Beta]

  Derived parameters are obtained from the following equations. Plasma beta =
  [(T*4.16/10**5) + 5.34] * Np / B**2 (B in nT) 
  

  Alfven mach number [Mach_num]

  Derived parameters are obtained from the following equations. Alfven Mach number
  = (V * Np**0.5) / 20 * B
  

  1AU IP Magnetosonic mach number [Mgs_mach_num]

  Derived parameters are obtained from the following equations. Magnetosonic Mach
  number = V/Magnetosonic_speedMagnetosonic speed = [(sound speed)**2 + (Alfv
  speed)**2]**0.5The Alfven speed = 20. * B / N**0.5The sound speed = 0.12 * [T +
  1.28*10**5]**0.5
  

  X s/c (Re), GSE [x]
  Y s/c (Re), GSE [y]
  Z s/c (Re), GSE [z]
  Bow Shock Nose (Re) location, X, GSE [BSN_x]
  Bow Shock Nose (Re) location, Y, GSE [BSN_y]
  Bow Shock Nose (Re) location, Z, GSE [BSN_z]
  AE - 5-minute AE-index, from WDC Kyoto (Final 1988/001-1988/182, Provisional 1990/001-2020/365) [AE_INDEX]
  AL - 5-minute AL-index, from WDC Kyoto (Final 1988/001-1988/182, Provisional 1990/001-2020/365) [AL_INDEX]
  AU - 5-minute AU-index,from WDC Kyoto (Final 1988/001-1988/182, Provisional 1990/001-2020/365) [AU_INDEX]
  SYM/D - 5-minute SYM/D index,from WDC Kyoto (1981/001-2026/090) [SYM_D]
  SYM/H - 5-minute SYM/H index,from WDC Kyoto (1981/001-2026/090) [SYM_H]
  ASY/D - 5-minute ASY/D index,from WDC Kyoto (1981/001-2026/090) [ASY_D]
  ASY/H - 5-minute ASY/H index,from WDC Kyoto (1981/001-2026/090) [ASY_H]
  Proton flux >10 MeV (1/(SQcm-ster-s)) (all fluxes from GOES 1986/001-2020/063) [PR-FLX_10]
  Proton flux >30 MeV (1/(SQcm-ster-s)) [PR-FLX_30]
  Proton flux >60 MeV (1/(SQcm-ster-s)) [PR-FLX_60]

OMNI_HRO_1MIN doi:10.48322/45bb-8792 Copy BibTeX Citation
Proper citations should include the "Accessed on date" in the form .

Description

1minute averaged definitive multispacecraft interplanetary parameters data
Additional information for all parameters are available from OMNI Data
Documentation: https://omniweb.gsfc.nasa.gov/html/HROdocum.html 
Additional data access options available at  SPDF's OMNIWeb Service:
https://omniweb.gsfc.nasa.gov/ow_min.html
Recent omni high resolution updates Release Notes:
https://omniweb.gsfc.nasa.gov/html/hro_news.html
Time stamps are for the beginning of each data averaging time bin.

Modification History

created November 2006;
conversion to ISTP/IACG CDFs via SKTEditor Feb 2000
2024 Sept: Added BIN_LOCATION attributes

• Data Variable Descriptions
  OMNI ID code for the source spacecraft for time-shifted IMF values (see OMNI documentation link for codes) [IMF]

  The following spacecraft ID's are used: ACE 71, Geotail 60, IMP 8 50, Wind 51 
  

  OMNI ID code for the source spacecraft for time-shifted IP plasma values (see OMNI documentation link for codes) [PLS]

  The following spacecraft ID's are used: ACE 71, Geotail 60, IMP 8 50, Wind 51 
  

  Number of fine time scale points in IMF averages [IMF_PTS]
  Number of fine time scale points in plasma averages [PLS_PTS]
  Percent interpolated [percent_interp]

  The percent (0-100) of the points contributing to the 1-min magnetic field
  averages whose phase front normal (PFN) was interpolated because neither the
  MVAB-0 nor Cross Product shift techniques yielded a PFN that satisfied its
  respective tests.
  

  Timeshift (seconds) [Timeshift]
  RMS Timeshift (seconds) [RMS_Timeshift]
  RMS, Phase front normal (nT) [RMS_phase]

  Note that standard deviations for the two vectors are given as the square roots
  of the sum of squares of the standard deviations in the component averages.  The
  component averages are given in the records but not their individual standard
  deviations. There are no phase front normal standard deviations in the 5-min
  records.  This word has fill (99.99) for such records.
  

  Time between observations (seconds) [Time_btwn_obs]
  Magnitude of avg. field vector (nT) (last currently-available OMNI B-field data Jul 07, 2026) [F]
  Bx (nT), GSE [BX_GSE]
  By (nT), GSE [BY_GSE]
  Bz (nT), GSE [BZ_GSE]
  By (nT), GSM, determined from post-shift GSE components [BY_GSM]
  Bz (nT), GSM, determined from post-shift GSE components [BZ_GSM]
  RMS SD B scalar (nT) [RMS_SD_B]
  RMS SD field vector (nT) [RMS_SD_fld_vec]

  Note that standard deviations for the two vectors are given as the square roots
  of the sum of squares of the standard deviations in the component averages.  The
  component averages are given in the records but not their individual standard
  deviations.
  

  Flow Speed (km/s), GSE [flow_speed]
  Vx Velocity (km/s), GSE [Vx]
  Vy Velocity (km/s), GSE [Vy]
  Vz Velocity (km/s), GSE [Vz]
  Proton density (n/cc) (last currently-available OMNI plasma data Jul 07, 2026) [proton_density]
  Temperature (K) [T]
  Flow pressure (nPa) [Pressure]

  Derived parameters are obtained from the following equations. Flow pressure =
  (2*10**-6)*Np*Vp**2 nPa (Np in cm**-3, Vp in km/s, subscript p for proton) 
  

  Electric Field (mV/m) [E]

  Derived parameters are obtained from the following equations. Electric field =
  -V(km/s) * Bz (nT; GSM) * 10**-3 
  

  Plasma beta [Beta]

  Derived parameters are obtained from the following equations. Plasma beta =
  [(T*4.16/10**5) + 5.34] * Np / B**2 (B in nT) 
  

  Alfven mach number [Mach_num]

  Derived parameters are obtained from the following equations. Alfven Mach number
  = (V * Np**0.5) / 20 * B
  

  1AU IP Magnetosonic mach number [Mgs_mach_num]

  Derived parameters are obtained from the following equations. Magnetosonic Mach
  number = V/Magnetosonic_speedMagnetosonic speed = [(sound speed)**2 + (Alfv
  speed)**2]**0.5The Alfven speed = 20. * B / N**0.5The sound speed = 0.12 * [T +
  1.28*10**5]**0.5
  

  X s/c (Re), GSE [x]
  Y s/c (Re), GSE [y]
  Z s/c (Re), GSE [z]
  Bow Shock Nose (Re) location, X, GSE [BSN_x]
  Bow Shock Nose (Re) location, Y, GSE [BSN_y]
  Bow Shock Nose (Re) location, Z, GSE [BSN_z]
  AE - 1-minute AE-index, from WDC Kyoto (Final 1988/001-1988/182, Provisional 1990/001-2020/365) [AE_INDEX]
  AL - 1-minute AL-index, from WDC Kyoto (Final 1988/001-1988/182, Provisional 1990/001-2020/365) [AL_INDEX]
  AU - 1-minute AU-index,from WDC Kyoto (Final 1988/001-1988/182, Provisional 1990/001-2020/365) [AU_INDEX]
  SYM/D - 1-minute SYM/D index,from WDC Kyoto (1981/001-2026/181) [SYM_D]
  SYM/H - 1-minute SYM/H index,from WDC Kyoto (1981/001-2026/181) [SYM_H]
  ASY/D - 1-minute ASY/D index,from WDC Kyoto (1981/001-2026/181) [ASY_D]
  ASY/H - 1-minute ASY/H index,from WDC Kyoto (1981/001-2026/181) [ASY_H]
  PC - 1-minute Polar Cap index (North, Qaanaaq geomagnetic observatory), from DTU Space, Technical University of Denmark (1981/001-2024/365) [PC_N_INDEX]

OMNI_HRO_5MIN doi:10.48322/gbpg-5r77 Copy BibTeX Citation
Proper citations should include the "Accessed on date" in the form .

Description

5minute averaged definitive multispacecraft interplanetary parameters data
Additional information for all parameters are available from OMNI Data
Documentation: https://omniweb.gsfc.nasa.gov/html/HROdocum.html 
Additional data access options available at  SPDF's OMNIWeb Service:
https://omniweb.gsfc.nasa.gov/ow_min.html
Recent omni high resolution updates Release Notes:
https://omniweb.gsfc.nasa.gov/html/hro_news.html
Time stamps are for the beginning of each data averaging time bin.

Modification History

created November 2006;
conversion to ISTP/IACG CDFs via SKTEditor Feb 2000
2024 Sept: Added BIN_LOCATION attributes

• Data Variable Descriptions
  OMNI ID code for the source spacecraft for time-shifted IMF values (see OMNI documentation link for codes) [IMF]

  The following spacecraft ID's are used: ACE 71, Geotail 60, IMP 8 50, Wind 51 
  

  OMNI ID code for the source spacecraft for time-shifted IP plasma values (see OMNI documentation link for codes) [PLS]

  The following spacecraft ID's are used: ACE 71, Geotail 60, IMP 8 50, Wind 51 
  

  Number of fine time scale points in IMF averages [IMF_PTS]
  Number of fine time scale points in plasma averages [PLS_PTS]
  Percent interpolated [percent_interp]

  The percent (0-100) of the points contributing to the 1-min magnetic field
  averages whose phase front normal (PFN) was interpolated because neither the
  MVAB-0 nor Cross Product shift techniques yielded a PFN that satisfied its
  respective tests.
  

  Timeshift (seconds) [Timeshift]
  RMS Timeshift (seconds) [RMS_Timeshift]
  Time between observations (seconds) [Time_btwn_obs]
  Magnitude of avg. field vector (nT) (last currently-available OMNI B-field data Jul 07, 2026) [F]
  Bx (nT), GSE [BX_GSE]
  By (nT), GSE [BY_GSE]
  Bz (nT), GSE [BZ_GSE]
  By (nT), GSM, determined from post-shift GSE components [BY_GSM]
  Bz (nT), GSM, determined from post-shift GSE components [BZ_GSM]
  RMS SD B scalar (nT) [RMS_SD_B]
  RMS SD field vector (nT) [RMS_SD_fld_vec]

  Note that standard deviations for the two vectors are given as the square roots
  of the sum of squares of the standard deviations in the component averages.  The
  component averages are given in the records but not their individual standard
  deviations.
  

  Flow Speed (km/s), GSE [flow_speed]
  Vx Velocity (km/s), GSE [Vx]
  Vy Velocity (km/s), GSE [Vy]
  Vz Velocity (km/s), GSE [Vz]
  Proton density (n/cc) (last currently-available OMNI plasma data Jul 07, 2026) [proton_density]
  Temperature (K) [T]
  Flow pressure (nPa) [Pressure]

  Derived parameters are obtained from the following equations. Flow pressure =
  (2*10**-6)*Np*Vp**2 nPa (Np in cm**-3, Vp in km/s, subscript p for proton) 
  

  Electric Field (mV/m) [E]

  Derived parameters are obtained from the following equations. Electric field =
  -V(km/s) * Bz (nT; GSM) * 10**-3 
  

  Plasma beta [Beta]

  Derived parameters are obtained from the following equations. Plasma beta =
  [(T*4.16/10**5) + 5.34] * Np / B**2 (B in nT) 
  

  Alfven mach number [Mach_num]

  Derived parameters are obtained from the following equations. Alfven Mach number
  = (V * Np**0.5) / 20 * B
  

  1AU IP Magnetosonic mach number [Mgs_mach_num]

  Derived parameters are obtained from the following equations. Magnetosonic Mach
  number = V/Magnetosonic_speedMagnetosonic speed = [(sound speed)**2 + (Alfv
  speed)**2]**0.5The Alfven speed = 20. * B / N**0.5The sound speed = 0.12 * [T +
  1.28*10**5]**0.5
  

  X s/c (Re), GSE [x]
  Y s/c (Re), GSE [y]
  Z s/c (Re), GSE [z]
  Bow Shock Nose (Re) location, X, GSE [BSN_x]
  Bow Shock Nose (Re) location, Y, GSE [BSN_y]
  Bow Shock Nose (Re) location, Z, GSE [BSN_z]
  AE - 5-minute AE-index, from WDC Kyoto (Final 1988/001-1988/182, Provisional 1990/001-2020/365) [AE_INDEX]
  AL - 5-minute AL-index, from WDC Kyoto (Final 1988/001-1988/182, Provisional 1990/001-2020/365) [AL_INDEX]
  AU - 5-minute AU-index,from WDC Kyoto (Final 1988/001-1988/182, Provisional 1990/001-2020/365) [AU_INDEX]
  SYM/D - 5-minute SYM/D index,from WDC Kyoto (1981/001-2026/181) [SYM_D]
  SYM/H - 5-minute SYM/H index,from WDC Kyoto (1981/001-2026/181) [SYM_H]
  ASY/D - 5-minute ASY/D index,from WDC Kyoto (1981/001-2026/181) [ASY_D]
  ASY/H - 5-minute ASY/H index,from WDC Kyoto (1981/001-2026/181) [ASY_H]
  PC - 5-minute Polar Cap index (North, Qaanaaq geomagnetic observatory), from DTU Space, Technical University of Denmark (1981/001-2024/365) [PC_N_INDEX]
  Proton flux >10 MeV (1/(SQcm-ster-s)) (all fluxes from GOES 1986/001-2020/063) [PR-FLX_10]
  Proton flux >30 MeV (1/(SQcm-ster-s)) [PR-FLX_30]
  Proton flux >60 MeV (1/(SQcm-ster-s)) [PR-FLX_60]