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

Contents:
A. Operations overview
B. Data set status
C. Scientific use
D. Caveats
E. Updates since previous version
F. Version history



A. Operations overview
----------------------

LAP operations are described in the operations report,
IRFU-ROS-OPR-AST2 in the DOCUMENT/FLIGHT_REPORTS directory of this
data set.


B. Data set status
------------------

This data set contains scientifically useful data from the Rosetta
RPC-LAP instrument. The data contained are primary instrument data,
in instrument units (TM) and NOT calibrated to physical units
(volts and amperes) and with instrumental offsets NOT removed.
See the caveats in Section D below for data use.


C. Scientific use
-----------------

While the edited data are scientifically useful to instrument
experts, these data files are supplied mainly for long-term archiving
and reference purposes and are not intended or suitable for
scientific use by the wider community.

For information on exact data products (science data, geometry files,
housekeeping), calibration, file formats and file naming conventions,
etc., consult the EAICD, RO-IRFU-LAP-EAICD, in the DOCUMENT
directory. For the specifics of this mission phase, see
the operations report, IRFU-ROS-OPR-AST2 in
the DOCUMENT/FLIGHT_REPORTS directory.


D. Caveats
----------

This section covers caveats relevant for this specific data set. For
general caveats, see the EAICD in the DOCUMENT directory.


D.1. General caveat
-------------------

The archived data set is complete, but it has not been possible to
scan every part of it for every possible problem before delivery, so
there may be numerous data quality issues in addition to this list.
While the data clearly have a great science potential, analysis has to
be done with great care. Anybody using the present data set is strongly
encouraged to contact a LAP CoI for cooperation.


E. Updates since previous version
---------------------------------

- Changed name of 7 PDS keywords to make them probe-specific.
- Bugfix: Uses correct ADC20 sampling frequency for setting
  timestamps for ADC20 data.
- Removed previously made modification of ADC16 TM values due to
  nonlinearity in ADC16.
- Uses SPICE for time conversions. Better time conversions from
  spacecraft clock to UTC.
- MAJOR: Data reorganized into fewer files with longer time series and
  sorted by type of measurement.
- Bugfix: Sweep timestamp increments corrected.
- Removed mistakenly included additional operations report for PC12.
- Changed name of mission phase operations report for naming
  consistency across data sets.

See section Version history.


F. Version history
------------------

Note that there has been changes in the organization of data sets:
- Previously, some data sets were split into several data sets, one
  per MTP, and therefore used the DATA_SET_ID description string to
  signify which MTP.
- Previously, data sets which covered the entire mission phase used
  the description strings EDITED and CALIB.
- New edited and calibrated data sets use the DATA_SET_ID description
  strings EDITED2 and CALIB2 to signify significants updates in
  the data set pipeline and the basic format of the data sets (fewer
  files and longer time series). The versioning of these data sets
  starts from V1.0.

Therefore, this data set supersedes the following data set(s):
    RO-A-RPCLAP-2-AST2-EDITED-V1.0

These data are uncalibrated
raw data, i.e. digital output of the instrument. As such, the
confidence level is very high.