PSP Solar Wind Electrons Alphas and Protons (SWEAP) SPAN-A Alpha Particle Distribution Function, Partial Moments, Instrument Frame, Level 3 (L3), 14 s Data

https://doi.org/10.48322/ke19-2789

2021-04-27 15:38:11Z

SPI Level 3 Data

File Naming Format: psp_swp_spi_sf0a_l3_mom_inst_YYMMDDDD_v01.cdf

This data product contains measurements of partial moments of the alpha particle distribution function in the instrument frame of reference. Users should be aware that the full ion distribution is typicaly not in the field of view, FOV, of the SPAN Ion instrument.

Parker Solar Probe SWEAP Rules of the Road

As part of the development of collaboration with the broader Heliophysics community, the mission has drafted a "Rules of the Road" to govern how PSP instrument data are to be used.

• 1. Users should consult with the PI to discuss the appropriate use of instrument data or model results and to ensure that the users are accessing the most recently available versions of the data and of the analysis routines. Instrument team Science Operations Centers, SOCs, and/or Virtual Observatories, VOs, should facilitate this process serving as the contact point between PI and users in most cases.
• 2. Users should heed the caveats of investigators to the interpretations and limitations of data or model results. Investigators supplying data or models may insist that such caveats be published. Data and model version numbers should also be specified.
• 3. Browse products, Quicklook, and Planning data are not intended for science analysis or publication and should not be used for those purposes without consent of the PI.
• 4. Users should acknowledge the sources of data used in all publications, presentations, and reports: "We acknowledge the NASA Parker Solar Probe Mission and the SWEAP team led by J. Kasper for use of data.".
• 5. Users are encouraged to provide the PI a copy of each manuscript that uses the PI data prior to submission of that manuscript for consideration of publication. On publication, the citation should be transmitted to the PI and any other providers of data.

Please acknowledge the Principal Investigator J.C. Kasper for use of the Data

spase://VSPO/NumericalData/ParkerSolarProbe/SWEAP/SPAN-A/Level3/AlphaPartialMoments/InstrumentFrame/PT14S

Online

Open

CDF

None

Please acknowledge the Principal Investigator J.C. Kasper. Please acknowledge the Data Providers and CDAWeb when using these Data.

Online

Open

CSV

Please acknowledge the Principal Investigator J.C. Kasper. Please acknowledge the Data Providers and CDAWeb when using these Data.

PT14S

Epoch Time, TT2000, Midpoint of Integration

Time Series defined by using: EPOCH

Epoch

Epoch Time Tags, TT2000, Nanoseconds since J2000 at Midpoint of the Integration

Warning: the Epoch time typically has an irregular cadence owing to frequent changes in the operating mode. TT2000 is measured in nanoseconds from J2000 with leap seconds included. Please refer to CDF TT2000 documentation with regards to this convention. This time corresponds to the first measurement of the spectrum. In accordance with SPDF standards, this epoch is interpreted a CDF_TT2000 time. It is acknowledged here that this epoch is not strictly equal to "terrestrial time" as it is defined in the CDF_TT2000 documentation nor is the calendar date interpreted by CDF_T2000 operation performed on this epoch strictly equal to Coordinated Universal Time, UTC This Parameter exhibits an increasing Monotonic Progression.

PT14S

ns

1.0e-9>s

01-Jan-1990 00:00:00.000000000

31-Dec-2029 23:59:58.999000000

25-Jan-2073 11:55:40.029759487

Time

Time Series defined by using: EPOCH

TIME

Time

This Parameter exhibits an increasing Monotonic Progression

PT14S

s

1.2623e+09

1.89346e+09

nan

Parker Solar Probe, Mission Elapsed Time

Time Series defined by using: EPOCH

MET

Parker Solar Probe, PSP, Mission Elapsed Time, MET, in string format

The mission elapsed time string is constructed as met_seconds+':'+met_subseconds_base50000, where: met_seconds is the CCSDS_MET value cast as an integer string with no whitespace and met_subseconds_base50000 is an "I05" format integer string formed by converting the xxx_SUBSEC value to units of 1/50000 second. For example, if the xxx_SUBSEC value is recorded in parts per 65536 o second, the correct procedure would be to round 50000*(xxx_SUBSEC/65536) to the nearest integer and cast a string by using the "I05" format. Here, CCSDS_MET is the mission elapsed time, in seconds, from the PSP Epoch, which is defined to be January 1, 2010, 12:00:00 UTC and xxx_SUBSEC is the elapsed time in fractional seconds since the last tick of MET typically in units of 2^-16 seconds.

PT14S

-1.0e+30

1.0e+30

nan

Application ID

Time Series defined by using: EPOCH

APID

Application Identifier, APID

PT14S

-1.0e+30

1.0e+30

nan

Sequence Number

Time Series defined by using: EPOCH

SEQN

Sequence Number

PT14S

-1.0e+30

1.0e+30

nan

Source

Time Series defined by using: EPOCH

SOURCE

Source

PT14S

-1.0e+30

1.0e+30

nan

Source Hash Value

Time Series defined by using: EPOCH

SOURCE_HASH

Source Hash Value

PT14S

-1.0e+30

1.0e+30

nan

Compression Ratio

Time Series defined by using: EPOCH

COMPR_RATIO

Compression Ratio

PT14S

-1.0e+30

1.0e+30

nan

Number of Data Points

Time Series defined by using: EPOCH

NDAT

Number of Data Points

PT14S

-1.0e+30

1.0e+30

nan

Data Size

Time Series defined by using: EPOCH

DATASIZE

Data Size

PT14S

-1.0e+30

1.0e+30

nan

SMP Bits

Time Series defined by using: EPOCH

SMP_BITS

SMP Bits

PT14S

-1.0e+30

1.0e+30

nan

LTCS NNNN Bits

Time Series defined by using: EPOCH

LTCSNNNN_BITS

LTCS NNNN Bits

PT14S

-1.0e+30

1.0e+30

nan

ARCH Bits

Time Series defined by using: EPOCH

ARCH_BITS

ARCH Bits

PT14S

-1.0e+30

1.0e+30

nan

Mode 1

Time Series defined by using: EPOCH

MODE1

Mode Number 1

PT14S

-1.0e+30

1.0e+30

nan

ARCH SUM

Time Series defined by using: EPOCH

ARCH_SUM

ARCH SUM

PT14S

-1.0e+30

1.0e+30

nan

ARCH SMP Data Quality Flag

Time Series defined by using: EPOCH

ARCH_SMP_FLAG

ARCH SMP Data Quality Flag

PT14S

-1.0e+30

1.0e+30

nan

Total Accumulation Period

Time Series defined by using: EPOCH

TOT_ACCUM_PERIOD

Total Accumulation Period

PT14S

-1.0e+30

1.0e+30

nan

Number of Accumulations

Time Series defined by using: EPOCH

NUM_ACCUM

Number of Accumulations

PT14S

-1.0e+30

1.0e+30

nan

Mode 2, ORI

Time Series defined by using: EPOCH

MODE2_ORI

Mode Number 2, ORI

PT14S

-1.0e+30

1.0e+30

nan

Mode 2

Time Series defined by using: EPOCH

MODE2

Mode Number 2

PT14S

-1.0e+30

1.0e+30

nan

F0

Time Series defined by using: EPOCH

F0

F0

PT14S

-1.0e+30

1.0e+30

nan

Status Bits

Time Series defined by using: EPOCH

STATUS_BITS

Status Bits

PT14S

-1.0e+30

1.0e+30

nan

Peak Bin

Time Series defined by using: EPOCH

PEAK_BIN

Peak Bin

PT14S

-1.0e+30

1.0e+30

nan

Product Bits

Time Series defined by using: EPOCH

PRODUCT_BITS

Product Bits

PT14S

-1.0e+30

1.0e+30

nan

Particle Counts

Time Series defined by using: EPOCH

CNTS

Particle Counts

PT14S

-1.0e+30

1.0e+30

nan

Gap

Time Series defined by using: EPOCH

GAP

Gap

PT14S

-1.0e+30

1.0e+30

nan

Quality Flag

Time Series defined by using: EPOCH

QUALITY_FLAG

Quality Flag

PT14S

256

-1

Rotation Matrix, Spacecraft Instrument

Time Series defined by using: EPOCH

ROTMAT_SC_INST

Rotation Matrix, Spacecraft Instrument

PT14S

nan

Partial Moment Number Density

Time Series defined by using: EPOCH

DENS

Partial Moment Number Density

PT14S

cm^-3

1.0e6>m^-3

0.1

10000.0

nan

Particle Velocity Moment

Time Series defined by using: EPOCH

VEL

Particle Velocity Moment

PT14S

km/s

1.0e3>m/s

-10000.0

10000.0

nan

Temperature Tensor

Time Series defined by using: EPOCH

T_TENSOR

Temperature, T, Tensor

PT14S

eV

1.602176565e-19>J

-10000.0

10000.0

nan

Temperature, Partial Moment

Time Series defined by using: EPOCH

TEMP

Temperature, Partial Moment, Average of Trace of Temperature Tensor

PT14S

eV

1.602176565e-19>J

-10000.0

10000.0

nan

Differential Energy Flux versus Energy

Time Series defined by using: EPOCH

EFLUX_VS_ENERGY

Differential Energy Flux versus Energy

PT14S

eV/(cm^2 s sr eV)

1.0e4>J/(m^2 s sr J)

0.001

1.0e+12

nan

Differential Energy Flux versus Theta

Time Series defined by using: EPOCH

EFLUX_VS_THETA

Differential Energy Flux versus Elevation Angle, Theta

PT14S

eV/(cm^2 s sr eV)

1.0e4>J/(m^2 s sr J)

0.001

1.0e+12

nan

Differential Energy Flux versus Phi

Time Series defined by using: EPOCH

EFLUX_VS_PHI

Differential Energy Flux versus Azimuth Angle, Phi

PT14S

eV/(cm^2 s sr eV)

1.0e4>J/(m^2 s sr J)

0.001

1.0e+12

nan

Particle Energy

Time Series defined by using: EPOCH

ENERGY_VALS

Particle Energy

PT14S

eV

1.602176565e-19>J

1.0

100000.0

nan

Elevation Angle, Spacecraft coordinates

Time Series defined by using: EPOCH

THETA_VALS

Elevation Angle, Spacecraft, SC, coordinates

PT14S

°

0.0174532925>rad

-90.0

90.0

nan

Azimuth Angle, Spacecraft coordinates

Time Series defined by using: EPOCH

PHI_VALS

Azimuth Angle, Spacecraft, SC, coordinates

PT14S

°

0.0174532925>rad

-180.0

360.0

nan