Parker Solar Probe(PSP) ASCII merged data (aareadme_psp)
COHO hourly and daily PSP data were made using PSP high res data archived at CDAWeb
1. The name of plasma data - 'PSP_SWP_SPC_L3I', parameters name -
Proton bulk velocity, from 1-dimensional Maxwellian fitting, in the [inertial] RTN frame (Only Good Quality)
[Total] proton density, from 1-dimensional Maxwellian fitting. (Only Good Quality)
Proton radial [most probable] thermal speed component, from 1-dimensional Maxwellian fitting. (Only Good Quality)
Note: for hourly data thermal speed was converted into temperature
2. The name of magnetic field data: 'PSP_FLD_L2_MAG_RTN_1MIN'
( see details at data descriptione there)
and heliocentric trajectory from HelioWeb at https://omniweb.sci.gsfc.nasa.gov/coho/helios/heli.html
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FORMAT DESCRIPTION ( for hourly and daily files)
WORD FORMAT FILL Value MEANING UNITS/COMMENTS
1 I4 Year 2018, etc.
2 I4 Decimal Day January 1 = Day 1
3 I3 Hour 0,1,...,23
4 F7.2 999.99 Spacecraft Heliocentric Astronomical units
Distance
5 F7.1 9999.9 Heliographic Inertial Latitude Degrees, +/-90
of the Earth
6 F7.1 9999.9 Heliographic Inertial Longitude Degrees, 0-360
of the Earth
7 F9.2 99999.99 BR RTN nT
8 F9.2 99999.99 BT RTN nT
9 F9.2 99999.99 BN RTN nT
10 F9.2 99999.99 Field Magnitude average (Vector) nT
11 F8.1 99999.9 VR Proton Flow speed, RTN km/s
12 F8.1 99999.9 VT Proton Flow speed, RTN km/s
13 F8.1 99999.9 VN Proton Flow speed, RTN km/s
14 F8.1 99999.9 V Proton Flow speed, km/s
15 F8.1 99999.9 THETA - elevation angle Degrees
of the velocity vector(V), RTN
16 F8.1 99999.9 PHI- azimuth angle Degrees
of the velocity vector(V), RTN
17 F8.1 99999.9 Proton Density N/cm^3
18 F10.0 99999999. Proton Temperature Degrees, K
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DESCRIPTION OF COORDINATE SYSTEMS
The Heliographic Inertial (HGI) coordinates are Sun-centered and inertially
fixed with respect to an X-axis directed along the intersection line of the
ecliptic and solar equatorial planes. The solar equator plane is inclined
at 7.25 degrees from the ecliptic. This direction was towards ecliptic
longitude of 74.367 degrees on 1 January 1900 at 1200 UT; because of
precession of the celestial equator, this longitude increases by 1.4
degrees/century. The Z axis is directed perpendicular and northward from
the solar equator, and the Y-axis completes the right-handed set. This
system differs from the usual heliographic coordinates (e.g. Carrington
longitudes) which are fixed in the frame of the rotating Sun.
The RTN system is fixed at a spacecraft (or the planet). The R axis
is directed radially away from the Sun, the T axis is the cross product of
the solar rotation axis and the R axis, and the N axis is the cross
product of the R and T axes. At zero heliographic latitude, when the
spacecraft is in the solar equatorial plane, the N and solar rotation axes
are parallel.
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Acknowledgement:
Use of these data in publications should be accompanied at minimum by
acknowledgements of the GSFC/SPDF and OMNIWeb.
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SPDF contact:
Dr. N. Papitashvili, E-mail: Natalia.E.apitashvili@nasa.gov
Dr Lan Jian, E-mail: lan.jian@nasa.gov
For browse and retrieval that data with different kind of functionalities:
see http://omniweb.gsfc.nasa.gov/coho/
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Related data and directories:
SPDF Data and Orbits Services <http://spdf.gsfc.nasa.gov/>
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Please acknowledge NASA's Space Physics Data Facility and
and relevant scientists identified above for data usage.
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Authorizing NASA Official: Robert Candey, Head, SPDF, NASA Goddard Space Flight Center
e-mail: Robert.M.Candey@nasa.gov
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