Data Set Overview
    =================

    This data set contains 'raw' SREM count rate data (1/s), converted from
    the equivalent SREM Level 0 CDF products, which are provided in the
    EXTRAS directory.
    Note that the CDF processing levels differ from the CODMAC definition
    used within these PDS data sets.  The SREM CDF Level 0 data are
    equivalent to the PDS CODMAC Level 2 data while the SREM CDF Level 2
    data are equivalent to the PDS CODMAC Level 5 data.

    Associated standard deviations are also provided within each data product,
    calculated as the square root of the count rate values.

    These data are useful for determining the energetic particle
    environment experienced by the Standard Radiation Environment Monitor
    onboard the Rosetta Orbiter.

    Processing
    ==========

    These are 'raw' count rate data converted directly from the equivalent
    SREM Level 0 CDF data.  No additional processing has been completed.

    Standard deviations are provided within each data product, along side
    the data, and are calculated as the square root of the count rate values.

    Data
    ====

    One data product is provided per day of measurement.  Data products
    are named according to the following convention:

    SREM_L_YYYYMMDD.EXT

    Where:

     is the CODMAC processing level (2 for the count rate data and 5 for
        the derived proton and electron flux data).

    YYYMMDD is the date of the observation.

    EXT is the file extension (TAB for the ASCII data table and LBL for
        the detached PDS label file).

    All data products are formatted as plain ASCII tables and have an
    associated detached PDS label.

    The CODMAC Level 2 data are given as count rates (1/s) for each of the
    15 SREM energy bins, and their associated standard deviations
    (calculated as square root of the count rate).  Measurements are time
    tagged at the middle of the time interval (centered).

    The following table provides a list of the 15 SREM channels and the
    corresponding energy ranges of detected protons and electrons.

    |======|==========|==========|==========|============|
    | SREM | Proton Energy [Mev] | Electron Energy [MeV] |
    |------|----------|----------|----------|------------|
    | Bin  | Emin     | Emax     | Emin     | Emax       |
    |======|==========|==========|==========|============|
    | TC1  | 27       | infinity | 2.00     | infinity   |
    |------|----------|----------|----------|------------|
    | S12  | 26       | infinity | 2.08     | infinity   |
    |------|----------|----------|----------|------------|
    | S13  | 27       | infinity | 2.23     | infinity   |
    |------|----------|----------|----------|------------|
    | S14  | 24       | 542      | 3.20     | infinity   |
    |------|----------|----------|----------|------------|
    | S15  | 23       | 434      | 8.18     | infinity   |
    |======|==========|==========|==========|============|
    | TC2  | 49       | infinity | 2.80     | infinity   |
    |------|----------|----------|----------|------------|
    | S25  | 48       | 270      | -        | -          |
    |------|----------|----------|----------|------------|
    | C1   | 43       | 86       | -        | -          |
    |------|----------|----------|----------|------------|
    | C2   | 52       | 278      | -        | -          |
    |------|----------|----------|----------|------------|
    | C3   | 76       | 450      | -        | -          |
    |------|----------|----------|----------|------------|
    | C4   | 164      | infinity | 8.10     | infinity   |
    |======|==========|==========|==========|============|
    | TC3  | 12       | infinity | 0.80     | infinity   |
    |------|----------|----------|----------|------------|
    | S32  | 12       | infinity | 0.75     | infinity   |
    |------|----------|----------|----------|------------|
    | S33  | 12       | infinity | 1.05     | infinity   |
    |------|----------|----------|----------|------------|
    | S34  | 12       | infinity | 2.08     | infinity   |
    |======|==========|==========|==========|============|

    Table Extracted from [SANDBERGETAL2012]

    The LBL file contains metadata with information about the instrument,
    mission, any important instrument parameters or measurement parameters,
    start and stop time of the measurement, and the pointer to the TAB
    object.

    The data table is structured as follows:

    - A first row with text headers defining the corresponding SREM channel
      and standard deviation for each column in the subsequent table.

    - The data table (called SREM_COUNT_RATES_TABLE) with each row containing
      the following columns:

      Time:                 A time tag per measurement, at the center of the
                            observation.
      Count Rates:          15 count rates values (one per channel).

      Standard Deviations:  15 standard deviation values (one per count rate)
                            calculated as the square root of the count rates.

    IMPORTANT NOTES:
    - As noted above, the time values provided mark the center time of
      the observation.
    - The PDS keyword MISSING_CONSTANT, which is provided in every LBL file,
      indicates the value (-1.0E31) used in the data table if no measurement
      data is available.  Any zero values in the data tables are real
      measurements.


    Software
    ========

    No software is provided with this data set.  All products are provided as
    plain ASCII tables and can be read using the standard freely available
    NASAView and ReadPDS software packages.


    Media/Format
    ============

    The data set will be delivered and kept online.

All data have been reviewed by the SREM
                                       team to check for data set completeness
                                       and screened for non-physical values
                                       such as negative energy.  No obvious
                                       errors have been found in the data at
                                       this time.  Data have also been passed
                                       through two Rosetta independent science
                                       reviews, and all items raised have been
                                       addressed.