Explorer 43 Measurement of Magnetic Fields (MMF) data at 15.36 s Resolution

IMP 6 MMF data

IMP I MMF data

IMP EYE MMF data

2020-07-07 21:14:33Z

The Explorer 43 Measurement of Magnetic Fields (MMF) data at 15.36 s resolution in various coordinate systems. These data consists of magnetic field vectors, variances, and spacecraft position measurements in several coordinate systems.

NASA-Office of Space Science Applications (United States); Dr. Norman F. Ness

spase://VMO/NumericalData/Explorer/43/MMF/PT2S

spase://VSPO/NumericalData/Explorer/43/MMF/PT2S

spase://VSPO/NumericalData/Explorer43/MMF/PT2S

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NASA; Dr. Norman F. Ness

PT15.34S

Universal Time

Time

Universal time columns from left to right are: year, day of year, and milliseconds of the day.

This parameter is for the last sequence included in the 15.36 s statistical computation. for all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.

PT1S

Data Quality Flag

8 bit counts. Order: from left to right: 2^7, 2^6,2^5,...2^0. Flags: from left to right: black, 90 degrees, 0 degrees, Heater, CAL, AUTO, range 2, and range, 1.

This parameter is for the last sequence included in the 15.36 s statistical computation. For all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.

Orbit Number

Orbit number of Explroer 43 from the beginning of the mission.

This parameter is for the last sequence included in the 15.36 s statistical computation. For all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.

Bit Rate Flag

No description given.

This parameter is for the last sequence included in the 15.36 s statistical computation. For all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.

Pseudo Sequence Count

No description given.

This parameter is for the last sequence included in the 15.36 s statistical computation. For all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.

Actually Satellite Clock from spacecraft

No description given.

This parameter is for the last sequence included in the 15.36 s statistical computation. For all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.

House Keeping data

No description given.

This parameter is for the last sequence included in the 15.36 s statistical computation. For all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.

Field Magnitude (F1)

Averaged over 15.36 s. F1 = (1/N)*Sum to n of F_i where F_i is computed by the PAYAVG subroutine over 1.28 seconds. The PAYAVG subroutne was not available with the data or data descriptio.

gamma

Field Magnitude (F2)

Averaged over 15.36 s. Fl = SQRT( ((1/N) ∑ X_i)^2 + ((1/N) ∑ Y_i)^2 + ((1/N) ∑ Z_i)^2 ) where X_i, Y_i, and Z_i are computed by the PAYAVG subroutine over 1.28 seconds. Sum from i=1 to N.

gamma

Theta

Averaged over 15.36 s. Theta is sin^{-1}(Bz/B_manitude).

degrees

-90

+90

Phi

Averaged over 15.36 s.

degrees

0

360

Variance from Averages

Variance matrix over 15.36 s. [Vxx,--,--;Vyx,Vyy,--;Vzx,Vzy,VZZ]. e.g., Vxx = ( (N ∑ X^{2}{i}) - ∑ X{i} ∑ X_{i} )/(N(N-1)). Vzy = ( (N ∑ Z_{i}Y_{i}) - ∑ Z_{i} ∑ Y_{i} )/(N(N-1)). Sum from i=1 to N.

N

Number of sequences over which statistics were comuted.

ND

Number of detail points over which statistics were comuted.

Trajectory Day

Jan 1 = 0.

day

Trajectory Millisec of the Day

millisec

Geomagnetic Latitude Satellite position

degrees

Geomagnetic Longitude Satellite position

degrees

Geocentric Solar Ecliptic Satellite Position

Location of the spacecraft in GSE coordinates in units of kilometers.

Radial Distance to Satellite from Earth's center

km

Geocentric Solar Magnetospheric Satellite Position

Location of the spacecraft in GSM coordinates in units of kilometers.

Geomagnetic Latitude Sun position

degrees

Geomagnetic Longitude Sun position

degrees

Theoretical Geomagnetic Field Geocentric Solar Ecliptic

Theoretical geomagnetic field but the magnetic field model is unclear.

Rotation Matrix

Rotation matrix from GSE to GSM

Rotation Matrix

Rotation matrix from celestial inertial to GSE

Geocentric Latitude Satellite Position

degrees

Geocentric Longitude Satellite Position

degrees

Right Ascension

Not clear what this is the right ascension of. Celestial Equatorial Coordinate System?

degrees

Declination

Not clear what this is the right ascension of. Celestial Equatorial Coordinate System?

degrees

Theta Solar Ecliptic

degrees

Theta Solar Magnetic

degrees

Phi Solar Ecliptic

degrees

Phi Solar Magnetic

degrees

Magnetic Field Vector Solar Ecliptic

Magnetic Field Vector Solar Magnetic