OMNI 1-min Data Set

https://doi.org/10.48322/45bb-8792

2022-03-09 12:34:56.789

High resolution (1-min), multi-source, near-Earth solar wind magnetic field and plasma data as shifted to Earth's bow shock nose, plus several 1-min geomagnetic activity indices.

We acknowledge the experiment teams that acquired, processed and provided the OMNI-included data, and J.H. King and N.E. Papitashvili of NASA/GSFC for creating the OMNI data set.

spase://VMO/NumericalData/OMNI/PT1M

spase://VSPO/NumericalData/OMNI/PT1M

spase://VSPO/NumericalData/OMNI/HighResolutionObservations/Version1/PT1M

Online

Open

CDF

Online

Open

Text

We acknowledge the experiment teams that acquired, processed and provided the OMNI-included data, and J.H. King and N.E. Papitashvili of NASA/GSFC for creating the OMNI data set.

Online

Open

CSV

We acknowledge the experiment teams that acquired, processed and provided the OMNI-included data, and J.H. King and N.E. Papitashvili of NASA/GSFC for creating the OMNI data set.

PT1M

Year

Column 01

Year.

Doy

Column 02

Decimal day of year (Jan 1 = Day 1).

Hour

Column 03

Decimal hour of day

0

23

Minute

Column 04

Minute, start of the averaged interval

0

59

IMF spacecraft ID

Column 05

ID for magnetic field data source spacecraft for this 3-hour interval. See documentation cited above. The following spacecraft IDs are used:

+--------------+
| ACE | 71 |
| Geotail | 60 |
| IMP 8 | 50 |
| Wind | 51 |
+--------------+

99

Plasma spacecraft ID

Column 06

ID for plasma data source spacecraft for this 3-hour interval. See documentation cited above. The following spacecraft IDs are used:

+--------------+
| ACE | 71 |
| Geotail | 60 |
| IMP 8 | 50 |
| Wind | 51 |
+--------------+

99

IMF FTS PTS

Column 07

Number of fine scale points in magnetic field parameter averages for this minute

999

Plasma FTS PTS

Column 08

Number of fine scale points in plasma parameter averages for this minute

999

Percent interp

Column 09

The percentage (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 (see detailed documentation for these).

999

time shift

Column 10

Average time shift for all 15-s IMF values shifting into this minute.

999999

RMS, time shift

Column 11

Standard deviation in time shift average of previous word.

999999

RMS, phase front normal

Column 12

Standard deviation in phase front normal as averaged component-wise over the phase front normals determined for each 15-s IMF vector shifting into this minute.

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.

99.99

Time between observations

Column 13

Difference between mean observation time of IMF data shifting into this minute and into preceding minute. Negative values suggest "out of sequence" BSN arrivals.

999999

Average magnetic field magnitude

Column 14

Average of fine scale field magnitudes

PT1M

nT

9999.99

Magnetic field vector, GSE

Averaged GSE Cartesian components of magnetic field vector

PT1M

nT

9999.99

Magnetic field vector, GSM

Averaged GSM Cartesian components of magnetic field vector

Note that Bx(GSM)=Bx(GSE) is given only once in data record. The GSM components are determined from post-shift GSE components.

PT1M

nT

9999.99

Standard deviation in average magnetic field magnitude

Column 20

Standard derviation in average of fine scale field magnitudes

PT1M

nT

9999.99

Standard deviation of average magnetic field vector

Column 21

Standard deviation of vector-averaged magnetic field vector. SQRT(sigma<Bx>2 + sigma<By>2 + Sigma<Bz>**2)

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

9999.99

Plasma proton flow speed

Column 22

Plasma proton flow speed, variously derived for various OMNI-input data sets.

PT1H

km/s

99999.9

Plasma velocity vector, GSE

Averaged GSE Cartesian components of plasma velocity vector

PT1M

km/s

99999.9

Plasma proton density

Column 26

Plasma proton density, variously derived for various OMNI-input data sets. Cross normalized

PT1M

number/cc

999.99

Plasma proton temperature

Column 27

Plasma proton temperature, variously derived for various OMNI-input data sets. Cross normalized

PT1M

K

9999999

Flow pressure

Column 28

P (nPa) = (1.67/106) * NpV2 * (1+ 4Na/Np), created from 1-min averaged Np, Na, V

PT1M

nPa

99.99

VxB Electric Field

Column 29

-V(km/s) * Bz (nT; GSM) * 10**-3; Minute-averaged V and Bz used; nearly Ey component

PT1M

mV/m

999.99

Plasma beta

Column 30

[(T4.16/105) + 5.34] * Np / B*2

PT1M

999.99

Alfven Mach Number

Column 31

(V * Np**0.5) / 20 * B

PT1M

999.9

IMF source spacecraft location, GSE

GSE Cartesian components of location of spacecraft providing IMF data

PT1M

Re

9999.99

Bow shock nose location, GSE

GSE Cartesian components of location of Earth's bow shock nose (BSN), to which data have been shifted. Dynamically computed from solar wind parameters.

PT1M

Re

9999.99

AE Index

Column_38

PT1M

nT

AL Index

Column_39

PT1M

nT

AU Index

Column_40

PT1M

nT

SYM/D Index

Column_41

PT1M

nT

SYM/H Index

Column_42

PT1M

nT

ASY/D Index

Column_43

PT1M

nT

ASY/H Index

Column_44

PT1M

nT

PCN Index

Column_45

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