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ID:: ivo://pds-ppi/mess_epps_eps_calibrated_summary_spectra/ppi/epn_core
Title:: MESSENGER EPPS EPS Calibrated Summary Spectra Data Collection
Short Name:: mess_epps_eps_ca
Date:: 25 Apr 2025 02:08:06
Publisher:: Planetary Data System
Description:: Contains a subset of EPS rate counters and low resolution calibrated energy spectra. CDR available only after FSW6 (8/18/2008).

ID:: ivo://pds-ppi/mess_epps_eps_calibrated_scan_spectra/ppi/epn_core
Title:: MESSENGER EPPS EPS Calibrate Scan Rate Data Collection
Short Name:: mess_epps_eps_ca
Date:: 25 Apr 2025 02:07:32
Publisher:: Planetary Data System
Description:: Integrated EPS hardware counters over four energy thresholds. Each threshold setting and integration lasts 1/4 second. Rates are reported in both raw and 'delta' form, see SIS document for details. CDR available only after FSW6 (8/18/2008).

ID:: ivo://pds-ppi/mess_epps_eps_derived_pa_daily_spectrogram/ppi/epn_core
Title:: MESSENGER EPPS EPS Derived Daily Pitch Angle Spectrograms Data Collection
Short Name:: mess_epps_eps_de
Date:: 25 Apr 2025 02:05:56
Publisher:: Planetary Data System
Description:: Contains derived daily pitch angle spectrogram data for the EPS odd-numbered shaped channels (ion=1,5,7,9). A given pitch angle spectrogram DDR data file contains all the observations obtained on one electron event. The particle measurement is 120 seconds averaged.

ID:: ivo://pds-ppi/mess_epps_eps_derived_pa_values/ppi/epn_core
Title:: MESSENGER EPPS EPS Derived Pitch Angle Data Collection
Short Name:: mess_epps_eps_de
Date:: 25 Apr 2025 02:02:24
Publisher:: Planetary Data System
Description:: EPS derived pitch angles for each of the six look directions reported at the same cadence as the EPS LoRes Spectral rate measurements. Each file thus has a one-to-one relationship with a corresponding LoRes spectral file.

ID:: ivo://pds-ppi/mess_epps_fips_calibrated_hi_spectra/ppi/epn_core
Title:: MESSENGER EPPS FIPS Calibrated High Priority Spectra Data Collection
Short Name:: FIPS-HI-SPCETRA
Date:: 15 Dec 2022 19:30:25
Publisher:: Planetary Data System
Description:: FIPS calibrated spectra data containing flux spectra and proton velocity distributions.

ID:: ivo://pds-ppi/mess_epps_fips_calibrated_hires_proton_v/ppi/epn_core
Title:: MESSENGER EPPS FIPS Calibrated High Resolution Proton Velocity Distribution Data Collection
Short Name:: FIPS-HIRES-P-V
Date:: 15 Dec 2022 19:24:52
Publisher:: Planetary Data System
Description:: MESSENGER EPPS FIPS Calibrated High Resolution Proton Velocity Distribution.

ID:: ivo://pds-ppi/mess_epps_fips_calibrated_med_spectra/ppi/epn_core
Title:: MESSENGER EPPS FIPS Calibrated Medium Priority Spectra Data Collection
Short Name:: mess_epps_fips_c
Date:: 25 Apr 2025 01:58:41
Publisher:: Planetary Data System
Description:: MESSENGER EPPS FIPS Calibrated Medium Priority Spectra Data.

ID:: ivo://pds-ppi/mess_epps_fips_calibrated_scan/ppi/epn_core
Title:: MESSENGER EPPS FIPS Calibrated Scan Data Collection
Short Name:: mess_epps_fips_c
Date:: 25 Apr 2025 02:00:41
Publisher:: Planetary Data System
Description:: FIPS calibrated flux spectra. Available only after the FSW6 upload.

ID:: ivo://pds-ppi/mess_mag_raw_log_ac_data/ppi/epn_core
Title:: MESSENGER MAG Alternating Current Data Collection
Short Name:: mess_mag_raw_log
Date:: 25 Apr 2025 02:08:46
Publisher:: Planetary Data System
Description:: Contains alternating current (AC) level values at the commanded sample rate. To conserve telemetry the vector sampling will usually be less than the maximum rate, 20 sample/s. To provide a record of the amplitude of fluctuations for frequencies higher than 1 Hz, an AC amplitude is calculated from the internally sampled 20/s data for the sensor axis commanded as the AC_AXIS. Thus, in addition to the vector samples data, a 1 Hz to 10 Hz bandpass average amplitude is evaluated for the commanded sensor axis, selected by command, and recorded as a log AC value with a 4-bit mantissa of the four most significant non-zero bits and a 4-bit power of two exponent of the 4th (least significant) bit of the mantissa. This is called the logAC value. It is created once per second and saved for telemetry at that rate or at the commanded science rate, whichever is less frequent.

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