Explorer 35 Goddard Space Flight Center Magnetometer data

IMP 2 Goddard Space Flight Center Magnetometer data

IMP-E Goddard Space Flight Center Magnetometer data

AIMP 2 Goddard Space Flight Center Magnetometer data

2021-03-11 18:39:11Z

This data set, from the GSFC magnetometer on the lunar- orbiting Explorer 35 spacecraft, contains 81.92s averages, taken over 5.12s values, of the magnetic field magnitude and Cartesian components in GSE and GSM coordinates, plus the standard deviations for field magnitude and GSE component averages. The spacecraft position vector is given in GSE, GSM and SSE (Selenocentric Solar Ecliptic) coordinates. Additional parameters in the data records relate to field data in payload coordinates, spacecraft spin rate and spin axis direction, relative variability of the field vector and its magnitude, and various quality flags. The data are available in annual ASCII files.

To the instrument PI, Norman F. Ness, and to the Space Physics Data Facility at Goddard

spase://VHO/NumericalData/Explorer35/GSFC_Magnetometer/PT82S

spase://VMO/NumericalData/Explorer35/GSFC_Magnetometer/PT82S

spase://VSPO/NumericalData/Explorer35/GSFC_Magnetometer/PT82S

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To the instrument PI, Norman F. Ness, and to the Space Physics Data Facility at Goddard

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NSSDC; Dr. Steve Joy

PT82S

Universal Time

Time

Universal time columns from left to right are: year-month-day (yyyy-mm-dd) and seconds of the day.

PT1S

Field Magnitude

Magnetic field magnitude

Magnetic field magnitude for Explorer 35 in units of nT.

PT82S

nT

Standard Deviation in the Field Magnitude

Standard Deviation in the magnetic field magnitude

Standard deviation in the magnetic field magnitude for Explorer 35 in units of nT. The magnitude give is an average over 82 s and the standard deviation is given with the mean value.

PT82S

nT

GSE Bx, By, Bz

Magnetic Field Vectors in GSE coordinates

Magnetic field vector for Explorer 35 in GSE coordinate system in units of nT.

PT82S

nT

Standard deviations of Magnetic Field Vectors

Standard deviations of Magnetic Field Vectors in GSE coordinates

Standard deviations for each magnetic field component for Explorer 35 in GSE coordinate system in units of nT.

PT82S

nT

GSE B Latitutde and Azimuth

Latitude and azimuthal direction of the magnetic field

Latitude and azimuthal direction of the magnetic field for Explorer 35 in GSE coordinate system in units of degrees.

PT82S

degrees

GSM By, Bz

Magnetic Field Vectors in GSM coordinates

Magnetic field vector for Explorer 35 in GSM coordinate system in units of nT.

PT82S

nT

GSE X,Y,Z

Position Vectors

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

PT82S

GSM Y,Z

Position Vectors

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

PT82S

Selenocentric Solar Ecliptic X,Y,Z

Position Vectors

Location of the spacecraft in Selenocentric Solar Ecliptic coordinates in units of lunar radii.

PT82S

Spacecraft spin period

S/C spin period

Spin period of the spacecraft in seconds.

PT82S

s

Optical Aspect Time

Optical aspect time

Come from the optical apsect system on Explroer 35. It is unclear what the optical aspect time is a measure of.

PT82S

s

Right Ascension and Declination

Spin axis RA and Declination

Right ascension and declination in GSE coordinates referenced to the earth equator and equinox of Julian Epoch 1950.0.

PT82S

degrees

Right Ascension and Declination

Spin axis RA and Declination

Right ascension and declination in GSM coordinates referenced to the earth equator and equinox of Julian Epoch 1950.0.

PT82S

degrees

F Ratio

F Ratio

F Ratio is {(RMS standard deviation in sequence-averaged field magnitude)/(sequence averaged field magnitude)}*100.

PT82S

Payload Bx, By, Bz

Magnetic Field Vectors in spacecraft coordinates

Magnetic field vector for Explorer 35 in spacecraft coordinate system in units of nT.

PT82S

nT

Standard deviations of Payload Magnetic Field Vectors

Standard deviations of Magnetic Field Vectors in spacecraft coordinates

Standard deviations for each magnetic field component for Explorer 35 in spacecraft coordinate system in units of nT. See N.F. Ness, Magnetometers for space research,
Space Science Reviews November 1970, Volume 11, Issue 4, pp 459-554 for a good discussion on the payload coordinates.

PT82S

nT

Payload B Latitutde and Azimuth

Latitude and azimuthal direction of the magnetic field

Latitude and azimuthal direction of the magnetic field for Explorer 35 in spacecraft coordinate system in units of degrees.

PT82S

degrees

C Ratio

C Ratio

C Ratio is {[RMS(BxSE) + RMS(BySE) + RMS(BzSE)]/[SQRT(<BxSE>2 + <BySE>2 + <BzSE>*2)]} 100/3.

PT82S

Data quality flag

Data quality flag

Data quality flags relate to spacecraft clock readings. A value of zero is best.

PT82S

Experiment flag 1

Experiment flag

The sensor flip state. It is unclear what each value indicates.

PT82S

Experiment flag 2

Experiment flag

State of the magnetometer: normal, flipping, or calibrating. It is unclear what each value indicates.

PT82S

Experiment flag 3

Experiment flag

The sensitivity level (+/-24 nT or ±64 nT) of the magnetometer. It is unclear what each value indicates.

PT82S

Number of points in avgs

# of points in avgs

The number of data points used to get average values.

PT82S

Sequence Number

Sequence # (clock)

Spacecraft clock sequence number.

PT82S

Sequence ID

Sequence ID

It is unclear what each value indicates.

PT82S