OMNI, Combined Solar Wind Plasma Moments and Interplanetary Magnetic Field (IMF) Time-Shifted to the Nose of the Earth's Bow Shock, plus Geomagnetic Indices, 1 min Data

https://doi.org/10.48322/mj0k-fq60

2021-05-31 12:34:56.789

Near-Earth Heliospheric Data, OMNI, Definitive Multispacecraft Interplanetary Parameters Data, 1 min averaged

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 via the Space Physics Data Facility, SPDF, OMNIWeb Service: https://omniweb.gsfc.nasa.gov/ow_min.html

The Modified (Level-3) High Resolution OMNI data files are made in the same format as the OMNI files based on SWE Key Parameter data. There are a few differences between old and new high resolution OMNI data sets:

• 1. In the newly 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 to use more accurate plasma parameters. However, the time coverage in the new OMNI data was decreased by from 2% to 10%. See the data description at https://spdf.gsfc.nasa.gov/pub/data/omni/high_res_omni/modified/. For detail comparison 1 min SWE definitive and cross-normalized SWE Key Parameter data sets, see https://omniweb.gsfc.nasa.gov/ftpbrowser/wind_pla_def_kp_norm.html.
• 2. To keep the number of words and the record lengths the same as in the old OMNI high resolution data set, we replaced the PCN Index (word #45) in the ASCII records with the new Alpha/Proton Density Ratio parameter.
• 3. The latest date for these new data is usually behind of the OMNI based on SWE_KP data.

Modifications:

• 1. Conversion to ISTP/IACG CDFs via SKTEditor, February 2000
• 2. Time tags in CDAWeb version were modified to use the CDAWeb convention of having mid-average time tags rather than OMNI original convention of start-of-average time tags, March 2005

Please acknowledge the Principal Investigator J.H. King and N.E. Papitashvili for use of the Data

spase://VSPO/NumericalData/OMNI/HighResolutionObservations/Version2/PT1M

Online

Open

CDF

None

Please acknowledge the Principal Investigator J.H. King and N.E. Papitashvili. Please acknowledge the Data Providers and CDAWeb when using these Data.

Online

Open

CSV

Please acknowledge the Principal Investigator J.H. King and N.E. Papitashvili. Please acknowledge the Data Providers and CDAWeb when using these Data.

PT1M

Epoch Time

Epoch

Epoch Time Tags

PT1M

ns

1.0e-9>s

01-Jan-1963 00:00:00.000

31-Dec-2003 23:59:59.000

31-Dec-9999 23:59:59.999

Four Digit Year

Time series defined by using: EPOCH

YR

Four Digit Year

PT1M

a

31536000>s

1963

2020

-2147483648

Decimal Day of Year

Time series defined by using: EPOCH

Day

Decimal Day of Year, January 1 is Day 1

PT1M

d

86400>s

1

366

-2147483648

Decimal Hour of Day

Time series defined by using: EPOCH

HR

Decimal Hour of Day

PT1M

h

3600>s

0

23

-2147483648

Decimal Minute of Hour

Time series defined by using: EPOCH

Minute

Decimal Minute of Hour

PT1M

min

60>s

0

23

-2147483648

Omni Spacecraft ID, interplanetary magnetic field values

Time series defined by using: EPOCH

IMF

OMNI Spacecraft ID, code for the source of the data used to calculate the time-shifted interplanetary magnetic field, IMF, values, see the OMNI documentation link for a list of the Spacecraft ID codes

The following spacecraft IDs are used: ACE 71, Geotail 60, IM 50, Wind 51

PT1M

1

98

99

Omni Spacecraft ID, interplanetary plasma values

Time series defined by using: EPOCH

PLS

OMNI Spacecraft ID, code for the source of the data used to calculate the time-shifted interplanetary plasma, IP, values, see the OMNI documentation link for a list of the Spacecraft ID codes

The following spacecraft IDs are used: ACE 71, Geotail 60, IM 50, Wind 51

PT1M

1

98

99

Interplanetary Magnetic Field, number of fine time scale observations per average value

Time series defined by using: EPOCH

IMF_PTS

Number of fine time scale observations per Interplanetary Magnetic Field, IMF, Average

PT1M

0

998

999

Interplanetary Plasma, number of fine scale observations per average value

Time series defined by using: EPOCH

PLS_PTS

Number of fine time scale observations per Interplanetary Plasma, IP, Average

PT1M

0

998

999

Percent of interpolated Solar Wind Observations

Time series defined by using: EPOCH

percent_interp

Percent of interpolated Solar Wind Observations. The percentage 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.

The percentage of the points contributing to th min magnetic field averages whose phase front normal, PFN, was interpolated because neither the MVAB-0 nor Cross Product shift techniques yielde PFN that satisfied its respective tests.

PT1M

0

100

999

Solar Wind Propagation Time Shift

Time series defined by using: EPOCH

Timeshift

Solar Wind Propagation Time Shift

PT1M

s

-10000

10000

999999

Solar Wind Propagation Time Shift, RMS

Time series defined by using: EPOCH

RMS_Timeshift

Solar Wind Propagation Time Shift, Root Mean Square, RMS

PT1M

s

-10000

10000

999999

Solar Wind Phase Front Normal, RMS

Time series defined by using: EPOCH

RMS_phase

Solar Wind Phase Front Unit Vector Normal Direction, Root Mean Square, RMS. 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.

PT1M

nT

1.0e-9>T

0.0

100.0

99.99

Time between Observations

Time series defined by using: EPOCH

Time_btwn_obs

Time between Observations

PT1M

s

-10000

10000

999999

Interplanetary Magnetic Field Vector, Average Magnitude

Time series defined by using: EPOCH

F

Interplanetary Magnetic Field, B, Vector, Average Magnitude

PT1M

nT

1.0e-9>T

0.0

100.0

9999.99

Interplanetary Magnetic Field, Bx-component, GSE Coordinates

Time series defined by using: EPOCH

BX_GSE

Interplanetary Magnetic Field, Bx-component, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

PT1M

nT

1.0e-9>T

-99.9

99.9

9999.99

Interplanetary Magnetic Field, By-component, GSE Coordinates

Time series defined by using: EPOCH

BY_GSE

Interplanetary Magnetic Field, By-component, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

PT1M

nT

1.0e-9>T

-99.9

99.9

9999.99

Interplanetary Magnetic Field, Bz-component, GSE Coordinates

Time series defined by using: EPOCH

BZ_GSE

Interplanetary Magnetic Field, Bz-component, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

PT1M

nT

1.0e-9>T

-99.9

99.9

9999.99

Interplanetary Magnetic Field, By-component, GSM Coordinates

Time series defined by using: EPOCH

BY_GSM

Interplanetary Magnetic Field, By-component, Geocentric Solar Magnetospheric, GSM, Cartesian Coordinates, determined from post-shift values components

PT1M

nT

1.0e-9>T

-99.9

99.9

9999.99

Interplanetary Magnetic Field, Bz-component, GSM Coordinates

Time series defined by using: EPOCH

BZ_GSM

Interplanetary Magnetic Field, Bz-component, Geocentric Solar Magnetospheric, GSM, Cartesian Coordinates, determined from post-shift values components

PT1M

nT

1.0e-9>T

-99.9

99.9

9999.99

Interplanetary Magnetic Field Vector Magnitude, RMS Standard Deviation

Time series defined by using: EPOCH

RMS_SD_B

Interplanetary Magnetic Field Vector Magnitude, B, Root Mean Square, RMS, Standard Deviation

PT1M

nT

1.0e-9>T

0.0

100.0

9999.99

Interplanetary Magnetic Field Vector, RMS Standard Deviation

Time series defined by using: EPOCH

RMS_SD_fld_vec

Interplanetary Magnetic Field Vector, B, Root Mean Square, RMS, Standard Deviation

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.

PT1M

nT

1.0e-9>T

0.0

100.0

9999.99

Solar Wind Flow Speed

Time series defined by using: EPOCH

flow_speed

Solar Wind Flow Speed, V

PT1M

km/s

1.0e3>m/s

0.0

2000.0

99999.9

Solar Wind Velocity, Vx-component, GSE Coordinates

Time series defined by using: EPOCH

Vx

Solar Wind Velocity, Vx-component, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

PT1M

km/s

1.0e3>m/s

-2000.0

2000.0

99999.9

Solar Wind Velocity, Vy-component, GSE Coordinates

Time series defined by using: EPOCH

Vy

Solar Wind Velocity, Vy-component, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

PT1M

km/s

1.0e3>m/s

-1000.0

1000.0

99999.9

Solar Wind Velocity, Vz-component, GSE Coordinates

Time series defined by using: EPOCH

Vz

Solar Wind Velocity, Vz-component, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

PT1M

km/s

1.0e3>m/s

-100.0

100.0

99999.9

Solar Wind Proton Number Density

Time series defined by using: EPOCH

proton_density

Solar Wind Proton Number Density, Np

PT1M

cm^-3

1.0e6>m^-3

-100.0

100.0

999.99

Solar Wind Plasma Temperature

Time series defined by using: EPOCH

T

Solar Wind Plasma Temperature, T

PT1M

°K

0.0

9.99998e+06

1.0e+07

Solar Wind Alpha Particle to Proton Number Density Ratio

Time series defined by using: EPOCH

NaNp_Ratio

Solar Wind Alpha Particle to Proton Number Density Ratio, Na/Np

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

PT1M

0.0

8.0

9.999

Solar Wind Flow Dynamic Pressure

Time series defined by using: EPOCH

Pressure

Solar Wind Flow Dynamic Pressure, p

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

PT1M

nPa

1.0e-9>Pa

0.0

100.0

99.99

Solar Wind Motional Electric Field

Time series defined by using: EPOCH

E

Solar Wind Motional Electric Field, E, equal to -(Vx (in km/s) Bz (in nT))/1000

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

PT1M

mV/m

1.0e-3>V/m

-50.0

100.0

999.99

Solar Wind Plasma Beta

Time series defined by using: EPOCH

Beta

Solar Plasma Beta, β, Ratio of the plasma pressure over the magnetic field pressure

Derived parameters are obtained from the following equations. Plasma bet [(T*4.16/10**5 5.34 N B**2 (B in nT)

PT1M

0.0

500.0

999.99

Solar Wind Alfvén Mach Number

Time series defined by using: EPOCH

Mach_num

Solar Wind Alfvén Mach Number, Ma, Ratio of the Flow Speed over the Alfvén Speed

Derived parameters are obtained from the following equations. Alfven Mach numbe ( Np**0.5 2 B

PT1M

0.0

500.0

999.9

Solar Wind Magnetosonic Mach Number

Time series defined by using: EPOCH

Mgs_mach_num

Solar Wind Magnetosonic Mach Number, Ms, Ratio of the Flow Speed over the square root of the sum of the Gas Dynamic Sound Speed squared and the Alfvén Speed squared

Derived parameters are obtained from the following equations. Magnetosonic Mach numbe V/Magnetosonic_speedMagnetosonic spee [(sound speed)** (Alfv speed)**2]**0.5The Alfven spee 20 N**0.5The sound spee 0.1 [ 1.28*10**5]**0.5

PT1M

0.0

30.0

99.9

Spacecraft Position, x-component, GSE Coordinates

Time series defined by using: EPOCH

x

Spacecraft Position, x-component, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

PT1M

Re

6.3712e6>m

-100.0

1000.0

9999.99

Spacecraft Position, y-component, GSE Coordinates

Time series defined by using: EPOCH

y

Spacecraft Position, y-component, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

PT1M

Re

6.3712e6>m

-100.0

1000.0

9999.99

Spacecraft Position, z-component, GSE Coordinates

Time series defined by using: EPOCH

z

Spacecraft Position, z-component, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

PT1M

Re

6.3712e6>m

-100.0

1000.0

9999.99

Bow Shock Nose Position, x-component, GSE Coordinates

Time series defined by using: EPOCH

BSN_x

Bow Shock Nose Position, x-component, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

PT1M

Re

6.3712e6>m

-100.0

100.0

9999.99

Bow Shock Nose Position, y-component, GSE Coordinates

Time series defined by using: EPOCH

BSN_y

Bow Shock Nose Position, y-component, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

PT1M

Re

6.3712e6>m

-100.0

100.0

9999.99

Bow Shock Nose Position, z-component, GSE Coordinates

Time series defined by using: EPOCH

BSN_z

Bow Shock Nose Position, z-component, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

PT1M

Re

6.3712e6>m

-100.0

100.0

9999.99

AE Index

Time series defined by using: EPOCH

AE_INDEX

AE Index, from the World Data Center, WDC, Kyoto, the index values are final for the time interval from 1988-01-01 to 1988-06-30 are provisional for the time interval from 1990-01-01 to 2018-02-28

PT1M

nT

1.0e-9>T

0

7000

99999

AL Index

Time series defined by using: EPOCH

AL_INDEX

AL Index, from the World Data Center, WDC, Kyoto, the index values are final for the time interval from 1988-01-01 to 1988-06-30 are provisional for the time interval from 1990-01-01 to 2018-02-28

PT1M

nT

1.0e-9>T

-5000

300

99999

AU Index

Time series defined by using: EPOCH

AU_INDEX

AU Index, from the World Data Center, WDC, Kyoto, the index values are final for the time interval from 1988-01-01 to 1988-06-30 are provisional for the time interval from 1990-01-01 to 2018-02-28

PT1M

nT

1.0e-9>T

-200

3000

99999

SYM D Index

Time series defined by using: EPOCH

SYM_D

SYM D Index, from World Data Center, WDC, Kyoto for the time interval from 1981-01-01

PT1M

nT

1.0e-9>T

-1000

1000

99999

SYM H Index

Time series defined by using: EPOCH

SYM_H

SYM H Index, from World Data Center, WDC, Kyoto for the time interval from 1981-01-01

PT1M

nT

1.0e-9>T

-1000

1000

99999

ASY D Index

Time series defined by using: EPOCH

ASY_D

ASY D Index, from World Data Center, WDC, Kyoto for the time interval from 1981-01-01

PT1M

nT

1.0e-9>T

-1000

1000

99999

ASY H Index

Time series defined by using: EPOCH

ASY_H

ASY H Index, from World Data Center, WDC, Kyoto for the time interval from 1981-01-01

PT1M

nT

1.0e-9>T

-1000

1000

99999