PSP Integrated Science Investigation of the Sun, Energetic Particle Instrument (ISOIS EPI) Merged Summary, Level 2 (L2), 1 min Data

https://doi.org/10.48322/y0fb-3v04

2024-02-22 12:34:56.789

Parker Solar Probe, PSP, Integrated Science Investigation of the Sun, IS☉IS, Energetic Particle Instrument, EPI-Hi and EPI-Lo, Summary data: The Epoch time tags indicate midpoint of integration. For information concerning use of the IS☉IS data please refer to the Energetic Particle Data User Guide available from the PSP IS☉IS Science Operations Center, SOC, web site hosted by the University of New Hampshire. The energetic particle pitch angle calculations are made possible via use of magnetic field data provided by the PSP FIELDS team.

The public data reflect current instrument calibration as determined by the IS☉IS science team. Calibration efforts are ongoing and the public data will be updated over the course of the mission based on improved understanding of instrument response to the near-Sun energetic particle environment. IS☉IS visualization tools are provided as a quicklook utility for the community to better access the IS☉IS data and are also under continual development. While we make every effort to ensure their accuracy, the IS☉IS team cannot guarantee that they are error-free. For questions regarding the use of IS☉IS data, please contact Colin Joyce (cjjoyce@princeton.edu).

Refer to the following web site concerning the Rules of use for the IS☉IS energetic particle data: https://spp-isois.sr.unh.edu/ISOIS_Terms_of_Use.html.

The PSP IS☉IS effort is funded as part of the NASA Parker Solar Probe mission under contract NNN06AA01C. Use of any PSP IS☉IS data in publications or presentations should include the following text for acknowledgement and also cite the PSP IS☉IS instrument suite publication:

Acknowledgement: Thanks to the Integrated Science Investigation of the Sun (IS☉IS) Science Team (PI: D. J. McComas, Princeton University).

Citation: McComas, D. J. (2020). PSP Integrated Science Investigation of the Sun, Energetic Particle Instrument (ISOIS EPI) Merged Summary, Level 2 (L2), 1 min Data [Data set]. NASA Space Physics Data Facility.

Please acknowledge the Principal Investigator D. J. McComas by using the following text: Thanks to the Integrated Science Investigation of the Sun (IS☉IS) Science Team (PI: D. J. McComas, Princeton University). And, please cite the PSP IS☉IS instrument suite publication: McComas, D. J. et al (2016). Space Sci. Rev., doi:10.1007/s11214-014-0059-1. See http://spp-isois.sr.unh.edu/ISOIS_Terms_of_Use.html.

Online

Open

CDF

None

Please acknowledge the Principal Investigator D. J. McComas. Please acknowledge the Data Providers and CDAWeb when using these Data.

Online

Open

CSV

Please acknowledge the Principal Investigator D. J. McComas. Please acknowledge the Data Providers and CDAWeb when using these Data.

PT1M

Epoch Time, Midpoint of Integration

Epoch

Epoch Time Tags, Nanoseconds since J2000 at Midpoint of the Integration

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent. This Parameter exhibits an increasing Monotonic Progression.

PT1M

ns

1.0e-9>s

1990-01-01T00:00:00.000000000

2029-12-31T23:59:59.999999000

9999-12-31T23:59:59.999999999

Spacecraft Position, Latitude, Heliographic Carrington Coordinates, Spherical

Time series defined by using: EPOCH

HGC_Lat

Spacecraft Position at the Timestamp, Latitude, Heliographic Carrington, HGI, Coordinates, Spherical

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

°

0.0174532925>rad

-180.0

180.0

-1.0e+31

Epoch Time Delta Plus/Minus

Epoch_DELTA

Epoch Time Delta Plus/Minus, one half of the Integration Time in Nanoseconds, used for Delta in Epoch

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

ns

1.0e-9>s

0

86000000000000

-9223372036854775808

EPI-Lo Look Angle, nominal Parker spiral configuration

Time series defined by using: EPOCH

Spiral_Lo

The Look Angle between the positive Z-axis as measured in EPI-Lo instrument frame and the nominal Parker spiral direction. The nominal Parker spiral angle direction at the spacecraft is calculated by assuming constant solar wind speed equal to 400 km/s and a corotation boundary located at 20 solar radii.

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

°

0.0174532925>rad

0.0

180.0

-1.0e+31

Ram Pointing Indicator Flag

Time series defined by using: EPOCH

Ram_Pointing

Ram Pointing Flag: a flag value equal to 1 indicates that the spacecraft is Ram pointing. Otherwise, the Ram pointing flag is set equal to 0. The conditions for Ram pointing are met when the roll angle is small and that either the Sun angle or clock angle are small.

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

0

1

-128

Spacecraft Position, Longitude, Heliocentric Inertial Coordinates, Spherical

Time series defined by using: EPOCH

HCI_Lon

Spacecraft Position at the Timestamp, Longitude, Heliocentric Inertial, HCI, Coordinates, Spherical

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

°

0.0174532925>rad

0.0

360.0

-1.0e+31

EPI-HETA Look Angle, nominal Parker spiral configuration

Time series defined by using: EPOCH

Spiral_HETA

The Look Angle between the positive Z-axis as measured in EPI-HETA instrument frame and the nominal Parker spiral direction. The nominal Parker spiral angle direction at the spacecraft is calculated by assuming constant solar wind speed equal to 400 km/s and a corotation boundary located at 20 solar radii.

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

°

0.0174532925>rad

0.0

180.0

-1.0e+31

Spacecraft Position, Longitude, Heliographic Carrington Coordinates, Spherical

Time series defined by using: EPOCH

HGC_Lon

Spacecraft Position at the Timestamp, Longitude, Heliographic Carrington, HGI, Coordinates, Spherical

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

°

0.0174532925>rad

0.0

360.0

-1.0e+31

Spacecraft Position, Heliocentric Radial Distance, Heliocentric Inertial Coordinates, Spherical

Time series defined by using: EPOCH

HCI_R

Spacecraft Position at the Timestamp, Heliocentric Radial Distance, Heliocentric Inertial, HCI, Coordinates, Spherical

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

ua

1.495978706961e11>m

0.04

1.03

-1.0e+31

Clock Angle, the off-pointing angle measured from ecliptic north

Time series defined by using: EPOCH

Clock_Angle

The clock angle corresponds to the angle measured around the positive R-axis between the positive Z-axis of the spacecraft projected on to the TN plane and the positive N-axis. The clock angle is nominally equal to zero meaning roughly ecliptic north. The clock angle ascends in the right-handed, counter clockwise, CCW, sense despite its name. So, positive values indicate directions toward the negative T-axis, which is opposite the ram direction, and negative values indicate directions toward positive T-axis or equivalently into ram. Undefined, that is fill, clock angle values occur if the Sun Angle is small.

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

°

0.0174532925>rad

-180.0

180.0

-1.0e+31

Roll Angle, the angle between nominal and actual ram directions

Time series defined by using: EPOCH

Roll_Angle

The roll angle corresponds to the angle measured in right-handed sense and in RTN coordinates between the spacecraft positive X-axis direction and the positive T-axis. The roll angle has a positive value when the spacecraft positive X-axis is tilted northward relative to the ecliptic plane.

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

°

0.0174532925>rad

-180.0

180.0

-1.0e+31

Spacecraft Position, Heliocentric Radial Distance, Heliographic Carrington Coordinates, Spherical

Time series defined by using: EPOCH

HGC_R

Spacecraft Position at the Timestamp, Heliocentric Radial Distance, Heliographic Carrington, HGI, Coordinates, Spherical

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

ua

1.495978706961e11>m

0.04

1.03

-1.0e+31

Umbra Pointing Indicator Flag

Time series defined by using: EPOCH

Umbra_Pointing

Umbra Pointing Flag: a flag value equal to 1 indicates that the spacecraft is Umbra pointing. Otherwise, the Umbra pointing flag is set equal to 0. Umbra pointing is nominal for encounter. The condition for Umbra pointing is met when the Sun angle is equal to zero.

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

0

1

-128

EPI-LET1A Look Angle, nominal Parker spiral configuration

Time series defined by using: EPOCH

Spiral_LET1A

The Look Angle between the positive Z-axis as measured in EPI-LET1A instrument frame and the nominal Parker spiral direction. The nominal Parker spiral angle direction at the spacecraft is calculated by assuming constant solar wind speed equal to 400 km/s and a corotation boundary located at 20 solar radii.

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

°

0.0174532925>rad

0.0

180.0

-1.0e+31

EPI-LET2C Look Angle, nominal Parker spiral configuration

Time series defined by using: EPOCH

Spiral_LET2C

The Look Angle between the positive Z-axis as measured in EPI-LET2C instrument frame and the nominal Parker spiral direction. The nominal Parker spiral angle direction at the spacecraft is calculated by assuming constant solar wind speed equal to 400 km/s and a corotation boundary located at 20 solar radii.

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

°

0.0174532925>rad

0.0

180.0

-1.0e+31

Spacecraft Position, Latitude, Heliocentric Inertial Coordinates, Spherical

Time series defined by using: EPOCH

HCI_Lat

Spacecraft Position at the Timestamp, Latitude, Heliocentric Inertial, HCI, Coordinates, Spherical

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

°

0.0174532925>rad

-180.0

180.0

-1.0e+31

Sun Angle, the angle between the spacecraft positive Z-axis and Sun direction

Time series defined by using: EPOCH

Sun_Angle

The Sun angle corresponds to the angle measured between the Thermal Protection System, TPS, orientation, which is given by the spacecraft positive Z-axis, and the Sun direction, which is given by the negative R-axis in RTN coordinates. The Sun angle is zero when the spacecraft is in encounter. The Sun angle always has a positive value.

* Mnenomic Pattern: A_Electrons>rate * Variable Parent: A_Electrons_Rate_TS_Parent

PT1M

°

0.0174532925>rad

0.0

180.0

-1.0e+31