Parameter Definitions
Magnetometer

RTN Bx, By, Bz: Average magnetic field component in RTN coordinates. One minute data are averages over two minutes centered on each minute. Ten minute data are averages over 20 minutes centered on the 10 minute mark. One hour data are average over 2 hours centered on each hour.

|B|: Average magnetic field magnitude calculated from individual full resolution magnitudes.

RTN RBx, RBy, RBz: Average direction cosines of the magnetic field computed from normalized components at full resolution. One minute data is average over two minutes calculated every minute. Same procedure used for 10 minute and 1 hour data.

Clock: Angle of the magnetic field in the T-N plane. Zero degree aligned with T. Ninety degrees is aligned with N.

Cone: Angle of the field with the R (antisunward) direction. Zero degrees is away from the Sun and 180 degrees is toward the Sun.





PLASTIC

Vp: Interpolated speed calculated from the three PLASTIC speed samples closest to the minute for one minute data ( These cover a two minutes span). Ten minute data are averages over 20 one-minute interpolated values centered on the 10 minute mark. One hour data are averages over 2 hours centered on each hour.

RTN, VrV, VtV, VnV: Average direction cosines of the velocity of solar wind composited every minute and averaged over two minute intervals.

Np: Interpolated proton number density. See above for averaging intervals.

Tp: Interpolated proton temperature. See above for averaging intervals.

Entropy: Logarithm of the 3/2 power over proton temperature to proton density.

Beta: Ratio of the perpendicular plasma (ion plus electron) thermal pressure to the magnetic pressure. A constant electron temperature of 130,000K is assumed. Due to the lack of alpha particle data, we assume its number density is 4% of proton's, and its temperature is 4 times of proton temperature.

Total Pressure: Sum of magnetic pressure and perpendicular plasma thermal pressure. See comments given for Beta calculation. Magenetic pressure also given separately.

Coordinate Systems:
    HAE: X to First Point of Aries; Z to ecliptic north. Angles are ecliptic longitude and latitude.
    HEE: X Sun to Earth; Z ecliptic north. Angles are longitude from Earth and ecliptic latitude.
    HEEQ: Z along solar rotation axis; Y along Z X R; Angles are heliographic longitude and latitude.
    CARR: Z along solar rotation axis. Y perpendicular to Carrington prime meridian; Angles are Carrington longitude and latitude.
    RTN: X Sun to spacecraft; Y perpendicular to plane containing Earth and rototion axis; Angles are zeroes.

Positions: X, Y, Z, R components of spacecraft position and total heliocentric distance in AU

Longitude: Angle in degrees from X axis
    CCW looking down on north pole of coordinate system

Latitude: Angle in degrees above XY plane of coordinate system

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