####MESSENGER EPPS FIPS DDR Bundle Readme

#####Introduction

This bundle contains part of the original data from the MESSENGER Energetic
Particle and Plasma Spectrometer (EPPS) derived data bundle set.

Note that the EPPS is made up of two instrument subsystems, the Fast
Imaging Plasma Spectrometer (FIPS), and the Energetic Particle
Spectrometer (EPS). This bundle includes only the Fast Imaging Plasma
Spectrometer (FIPS) instrument data. Two data sets were delivered within
the original data bundle, the FIPS and the EPS.

This bundle is intended for the use of scientists and students in the
study of the of the planet Mercury. The data may be used for research
and publication.

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####Bundle Organization:


####MESSENGER EPPS FIPS Derived Energy-Resolved Pitch Angle Distributions Data Collection

*  urn:nasa:pds:mess-epps-fips-derived:data-erpchang

This collection contains FIPS derived histograms of pitch angle in 5 degree bins for selected ion
species during selected time periods with the additional separation of energy/charge (i.e., E/q).


####MESSENGER EPPS FIPS Derived Energy Spectra Data Collection

*  urn:nasa:pds:mess-epps-fips-derived:data-espec

This collection contains FIPS derived differential energy flux at each
E/q value for selected ion species during selected time periods.


####MESSENGER EPPS FIPS Angular Flux Map Data Collection

*  urn:nasa:pds:mess-epps-fips-derived:data-fluxmap

This collection contains a mapping of the integrated FIPS ion flux as a
function of flow direction for selected ions and regions around Mercury.


####MESSENGER EPPS FIPS Derived Observed Density Data Collection

*  urn:nasa:pds:mess-epps-fips-derived:data-nobs

This collection contains FIPS derived observed density (n_obs) for all
major ion species as well as UTC and MESSENGER position.

####MESSENGER EPPS FIPS Derived Kinetic Properties Data Collection

*  urn:nasa:pds:mess-epps-fips-derived:data-ntp

This collection contains FIPS derived number density (cm^-3), temperature (K) and pressure
(nPa) for selected major ion species over selected time periods.

####MESSENGER EPPS FIPS Derived Pitch Angle Distributions Data Collection

*  urn:nasa:pds:mess-epps-fips-derived:data-pitchang

This collection contains FIPS derived histograms of pitch angle in 5 degree
bins for selected ion species during selected time periods.

####MESSENGER EPPS FIPS Derived Viewing Normalization Data Collection

*  urn:nasa:pds:mess-epps-fips-derived:data-rotmso

This collection conatins FIPS derived rotation
matrix from FIPS cartesian to MSO for each energy scan.


Data were originally archived in the following PDS3 data set:

*  [MESS-E/V/H/SW-EPPS-3-FIPS-DDR-V1.0](https://doi.org/10.17189/1519743)

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Every effort has been made to insure that the data are of the best quality
available. However, the PDS and the Planetary Plasma Interactions (PPI) Node
in particular, assume no liability for this bundle or its contents. Users are
encouraged to verify the 'correctness' of the data prior to submitting any
publications or other work based on these data.

***


####*Contacts*

For questions or problems regarding this bundle, please contact the PDS/PPI
PDS operator:

  Email             pds_operator@igpp.ucla.edu


For questions regarding PDS Standards or other bundles available from PDS,
please contact PDS Operator at the PDS Central Node (at JPL):

  Email             pds_operator@jpl.nasa.gov