Pysche Gamma Ray Spectrometer Delivery Notes 

This document, psyche_grs_delivery_notes.txt, contains delivery notes and 
errata concerning the Psyche Gamma Ray Spectrometer bundle. It is updated with 
each delivery of Psyche Gamma Ray Spectrometer data.

This document contains an entry for each Psyche Gamma Ray 
Spectrometer delivery with additional information about the contents of the delivery, 
in order from newest to oldest. Updates to previously delivered files are 
reported in these entries, along with any known errata.

******** DELIVERY-SPECIFIC INFORMATION ********

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Delivery Number: 1
Delivery Date: 2025-05-28
Data Coverage 2023-10-13 through 2025-03-31

New products added to these collections:
        urn:nasa:pds:psyche.grs:data_raw
        urn:nasa:pds:psyche.grs:document

Products revised in these collections:
        None 

Purpose of delivery: 
        Initial data delivery from Launch on 2023-10-13 through 2025 day of year 090.

Spacecraft activities during data coverage period:
        Launch: 2023-10-13
        Instrument powered on: 2023-11-06
        Initial Checkout: 2023-10-13 through 2024-01-21 
        Periodic Maintenance and Calibration Roll 1: 2024-07-18 
        Periodic Maintenance and Calibration Roll 2: 2025-01-26 

Anomalies:
        During Periodic Maintenance & Calibration (PMC) #1, which ran from 
        July 15 - 18 2024, we performed a simulation of Psyche Orbital operations 
        (on July 17) which included disabling the raw HPGe spectra. During this time, 
        only the Anti-Coincidence (AC) HPGe spectra were produced. This accounts for the 
        lack of Ch0_Raw_Spec events reported by the GRS Raw Counters data product during
        this time. This is noted in the recently published Psyche GRNS calibration paper. 
        Note that the PMCs will frequently include activities that may result in 
        undocumented changes in the science products, as the team continues to perform 
        activities like that detailed here, as well as updates to pulse processing 
        parameters to optimize science performance prior to arrival at asteroid 16 Psyche.

Additional Comments:
        None 

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Users are encouraged to provide comments to the PDS Small Bodies Node
if errors are found either in data or in documentation in this archive.
Please send comments by e-mail to:

    Department of Astronomy
    PDS Small Bodies Node
    University of Maryland
    Phone: (301) 405-5024
    Web: https://pds-smallbodies.astro.umd.edu/
    Email: neese@pmi.edu