CLPS TO2-AB LETS (Linear Energy Transfer Spectrometer) Data Archive
-------------------------------------------------------------------

Table of Contents

1. - Introduction
2. - Archive Overview

1. Introduction
---------------
The Linear Energy Transfer Spectrometer (LETS) Data Archive is
compiled for the National Aeronautics and Space Administration
(NASA) by members of the Space Radiation Analysis Group (SRAG) 
under the direction of LETS Science & Operations Lead
Dr. Nicholas N. Stoffle and Principal Investigator 
Dr. Edward J. Semones. Luke Stegeman, Research Engineer, is
responsible for its compilation.

This readme corresponds to the LETS data products found in
data_derived, data_raw, data_supplemental, and document collections. For more
detailed information on LETS, see the LETS User's guide,
users_guide.pdf, in the document collection within this bundle.

2. Archive Overview
-------------------

Top-level of bundle (clps_to_2ab_lets)
-------------------
readme.txt - The file you're looking at right now.
bundle_clps_to_2ab_lets.xml - A PDS4 required xml file that 
                              contains metadata pertaining to 
                              the full bundle contents.

data_derived collection (clps_to_2ab_lets/data_derived)
-----------------------
The data_derived collection contains LETS data products
derived from the raw particle count data. Namely, absorbed dose
and linear energy transfer flux spectra.

data_raw collection (clps_to_2ab_lets/data_raw)
-------------------
The data_raw collection contains LETS data products, like raw particle
count data, individual linear energy transfer count data, timing
statistics, and engineering data.

data_supplemental collection (clps_to_2ab_lets/data_supplemental)
----------------------------
The data_supplemental collection contains ancillary LETS data like
the time periods during Peregrine Mission 1 over which LETS was
functional, the sequence and timing of commands that were sent to LETS,
and the periods over which sending telemetry between LETS and Earth
was possible via the Deep-Space Network.

document collection (clps_to_2ab_lets/document)
-------------------
The document collection contains documentation to help the user
understand and use the data contained within the archive.

Archive Map
-----------

The clps_to_2ab_lets data bundle assumes the following structure:
/---clps_to_2ab_lets
   |   bundle_clps_to_2ab_lets.xml
   |   readme.txt
   |   
   +---data_derived
   |       collection_data_derived_inventory.csv
   |       collection_data_derived_inventory.xml
   |       dose.csv
   |       dose.xml
   |       let_flux.csv
   |       let_flux.xml
   |       
   +---data_raw
   |       alpha_counts.csv
   |       alpha_counts.xml
   |       cno_counts.csv
   |       cno_counts.xml
   |       collection_data_raw_inventory.csv
   |       collection_data_raw_inventory.xml
   |       electron_counts.csv
   |       electron_counts.xml
   |       engineering.csv
   |       engineering.xml
   |       gamma_counts.csv
   |       gamma_counts.xml
   |       heavy_counts.csv
   |       heavy_counts.xml
   |       let.csv
   |       let.xml
   |       nuclear_counts.csv
   |       nuclear_counts.xml
   |       proton_counts.csv
   |       proton_counts.xml
   |       timing.csv
   |       timing.xml
   |       unknown_counts.csv
   |       unknown_counts.xml
   |
   +---data_supplemental
   |       collection_data_supplemental_inventory.csv
   |       collection_data_supplemental_inventory.xml
   |	   lets_commands.csv
   |	   lets_commands.xml
   |       network_contact_periods.csv
   |       network_contact_periods.xml
   |       ontime.csv
   |       ontime.xml
   |
   \---document
           collection_document_inventory.csv
           collection_document_inventory.xml
           users_guide.docx
           users_guide.xml