NASA Logo, National Aeronautics and Space Administration
CDAWeb
+ FEEDBACK
CDAWeb banner

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 (spase://NASA/NumericalData/OMNI/PT1H)
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 
Modification History
created August 2003;
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.
 
Dataset in CDAWeb
Python/ IDL  Data Access Code Examples
Back to top
OMNI_COHO1HR_MERGED_MAG_PLASMA (spase://NASA/NumericalData/OMNI/COHO/MergedMagPlasma/PT1H)
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.
 
Dataset in CDAWeb
Python/ IDL  Data Access Code Examples
Back to top
OMNI_HRO2_1MIN (spase://NASA/NumericalData/OMNI/HighResolutionObservations/Version2/PT1M)
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
Modification History
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's
original convention of start-of-average time tags.
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..sci.gsfc.nasa.gov/html/HROdocum.html New data may be accesible
at  SPDFs OMNIWeb Service: https://omniweb.sci.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.sci.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.
 
Dataset in CDAWeb
Python/ IDL  Data Access Code Examples
Back to top
OMNI_HRO2_5MIN (spase://NASA/NumericalData/OMNI/HighResolutionObservations/Version2/PT5M)
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
Modification History
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's
original convention of start-of-average time tags.
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..sci.gsfc.nasa.gov/html/HROdocum.html New data may be accesible
at  SPDFs OMNIWeb Service: https://omniweb.sci.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.sci.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.
 
Dataset in CDAWeb
Python/ IDL  Data Access Code Examples
Back to top
OMNI_HRO_1MIN (spase://NASA/NumericalData/OMNI/HighResolutionObservations/Version1/PT1M)
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
Modification History
created November 2006;
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.
 
Dataset in CDAWeb
Python/ IDL  Data Access Code Examples
Back to top
OMNI_HRO_5MIN (spase://NASA/NumericalData/OMNI/HighResolutionObservations/Version1/PT5M)
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
Modification History
created November 2006;
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.
 
Dataset in CDAWeb
Python/ IDL  Data Access Code Examples
Back to top
NASA Logo - nasa.gov