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Volume CORPWS_1001
Cassini Orbiter
Radio and Plasma Wave Science
RPWS Langmuir Probe Standard Products Archive
Entire Mission
Planetary Plasma Interactions Discipline Node
of the
Planetary Data System
==============================================================================
Introduction
==============================================================================
This volume contains the Cassini Orbiter Radio and Plasma Wave Science (RPWS)
Langmuir Probe (LP) low-level calibrated measurements and high-level derived
products from the entire mission, submitted to the Planetary Data System
(PDS). Every effort has been made to ensure that the data and documentation
are of the best possible quality. However, mistakes are inevitable. The PPI
Node of the PDS will maintain an online list of ERRATA where errors and
updates are documented. Should any user of this product find an error on this
volume, please report the error to the PPI Node so that the finding can be
made public. All users are encouraged to verify the "correctness" of the data
prior to submitting any publications or other work based on these data. Users
of these data are encouraged to acknowledge both the PDS and the principal
investigators of the instruments whose data are used in analysis in all
publications.
==============================================================================
Quick Start Summary
==============================================================================
This volume contains multiple Langmuir probe data sets, both low-level
calibrated measurements and high-level derived plasma parameters, including
electron number density, electron temperature, and spacecraft potential
derived from Cassini Orbiter RPWS LP sweeps. This data set collection will
contain all available RPWS Langmuir probe data, with new data added as they
become available.
The BROWSE directory contains NEPROXY and TITAN subdirectories which contain
plots of all of the corresponding data on this volume in the form of Portable
Network Graphics (PNG) files. The DATA directory contains CNTCUR, NEPROXY,
TITAN, and UI subdirectories which contain ASCII text tables of all of the
data on this volume along with descriptive PDS label files.
General information for this data set collection is provided in PDS catalog
files located in the CATALOG directory:
Catalog file Describes
-------------- --------------------------------------------------------------
LPCNTCURDS.CAT RPWS LP continuous current data set
LPSWEEPDS.CAT RPWS LP sweep data set containing derived plasma parameters
LPUI_DS.CAT RPWS LP sweep voltage-current data set
NEPROXYDS.CAT RPWS LP proxy electron density data set
INSTHOST.CAT Cassini Orbiter spacecraft
MISSION.CAT Cassini-Huygens mission
PERSON.CAT personnel associated with Cassini RPWS data sets
PROJREF.CAT references cited in MISSION.CAT
REF.CAT references associated with Cassini RPWS data sets
RPWSINST.CAT Cassini Radio and Plasma Wave Science (RPWS) instrument
==============================================================================
Related PDS Products
==============================================================================
The primary RPWS standard data products in volume set CORPWS_0xxx include data
sets comprised of measurements from the multiple low-rate receivers sampling
wave power at selected frequencies, a key-parameters data set derived from
these, multi-antenna waveform data, single-antenna wideband waveform data, and
an archive of raw telemetry packets.
Another related PDS product is the Cassini Magnetosphere and Plasma Science
Key Parameter data set which includes the RPWS Key Parameter data set along
with similar products from the Cassini Magnetometer, Magnetospheric Imaging
Instrument, and Cassini Plasma Spectrometer Subsystem.
==============================================================================
Volume Information
==============================================================================
These data are supplied to the Planetary Data System as an online collection
of files in a PDS volume directory structure or as a standard compressed
archive, such as ZIP or TAR.GZ, of this collection. New releases of this
volume will be made as new data become available.
==============================================================================
Volume Format Information
==============================================================================
The online volume is organized into a hierarchical directory structure
following PDS standards.
==============================================================================
File Formats
==============================================================================
The data files on this volume are ASCII text files. Browse data are provided
in Portable Network Graphics (PNG) format. All data files are described by
detached PDS labels. A detached label file has the same name as the data file
that it describes, but with the extension .LBL. For example, the file
RPWS_LP_T_2013207_T93_V1.TAB is accompanied by the detached label file
RPWS_LP_T_2013207_T93_V1.LBL in the same directory. File names within this
archive comply with the "27.3" convention for compliance with ISO 9660 Level 2
interchange requirements.
All documents and detached PDS labels are stream format files, with a carriage
return (ASCII 13) and a line feed character (ASCII 10) at the end of the
record. This allows the files to be read by MacOS, DOS, Windows, UNIX, and
VMS operating systems. UNIX system users may see an unnecessary carriage
return character (^M) at the end of each line. Mac users may see an
unnecessary line feed character (^J) at the start of each line.
ASCII tabular data files (.TAB) are formatted so that they may be read
directly into many database management systems (DBMS) or spreadsheet programs
on various computers. All fields are of fixed length and are separated by
white space or commas. Character fields are left justified, and numeric
fields are right justified. The records are of fixed length, and the last two
bytes of each record contain the ASCII carriage return and line feed
characters. This allows a table to be treated as a fixed length record file
on computers that support this file type and as a normal text file on other
computers.
PDS labels are object-oriented. The object to which the label refers (e.g.,
SERIES, TABLE, etc.) is denoted by a statement of the form:
^object = location
in which the caret character (^, also called a pointer in this context)
indicates that the object starts at the given location. For an object in the
same file as the label, the location is an integer representing the starting
record number or byte of the object (the first record/byte in the file is 1).
For an object located outside the label file, the location denotes the name of
the file containing the object, along with the starting record or byte
number. For example:
^TABLE = ("RPWS_LP_T_2013207_T93_V1.TAB",1)
indicates that the TABLE object begins at record 1 of the file
RPWS_LP_T_2013207_T93_V1.TAB, in the same directory as the detached label
file. Below is a list of the possible formats that use the ^object keyword.
^object = n
^object = n❮BYTES❯
^object = ("filename.ext",n)
^object = ("filename.ext",n❮BYTES❯)
where
n is the starting record or byte number of the object, counting from
the beginning of the file (record 1, byte 1); default is record number.
❮BYTES❯ indicates that number given is in units of bytes.
filename upper-case file name.
ext upper-case file extension.
==============================================================================
Errata
==============================================================================
There is a file called ERRATA.TXT found at the root level of this volume which
contains a list of known deficiencies or caveats associated with data on this
volume at the time this revision was released.
If you find an error on this volume, please report the error to the PDS
Operator at the PPI Node of the PDS.
Internet pds_operator@igpp.ucla.edu
Telephone (310) 206-6073
U.S. Mail PDS Operator
c/o Dr. Raymond Walker
UCLA - IGPP
Los Angeles, CA 90095-1567
Only through support and feedback of the users of these data can an effective
errata list be maintained.
==============================================================================
Volume Contents and Structure
==============================================================================
This section describes the volume structure and naming conventions. Below is a
tree diagram of the volume, followed by a description of the directory
function and key files in each directory.
[CORPWS_1001] (root directory)
|
|- AAREADME.TXT Plain text describing volume contents,
| organization, and use (this file)
|
|- ERRATA.TXT Describes known deficiencies or caveats in the
| data on this volume.
|
|- VOLDESC.CAT High level description of volume contents.
|
|- [BROWSE] Contains browse plots depicting the data.
| |
| |- [ENCELADUS] Plots of plasma parameters derived from RPWS
| | LP sweeps for Enceladus encounters.
| |
| |- [NEPROXY] Plots of electron number density derived from
| | LP floating potential and an emperical relation
| | with CAPS measurements.
| |
| |- [SATURN] Plots of plasma parameters derived from RPWS
| | LP sweeps in Saturn's inner magnetosphere.
| |
| |- [TITAN] Plots of plasma parameters derived from RPWS
| LP sweeps for Titan encounters.
|
|- [CATALOG] Information on data sets and how they are
| processed and produced, on Cassini spacecraft
| and mission, on RPWS instrument, on cognizant
| personnel, and on references to various
| related documents.
|
|- [DATA] Contains the primary archive products which
| | are text tables of calibrated Langmuir probe
| | measurements or derived plasma parameters.
| |
| |
| |- [CNTCUR] Complete set of continuous current measurements
| | |
| | |- [TyyyydXX] Directory containing up to 100 days of files
| | |
| | |- RPWS_LP_CNTCUR_yyyyddd_Vm.LBL
| | |- RPWS_LP_CNTCUR_yyyyddd_Vm.LBL
| | Label and ASCII table files containing fixed bias
| | voltage and measured current in amps for both high
| | time resolution, 432 samples in 21.5s, and low time
| | resolution survey, 38 samples in 624s.
| |
| |- [ENCELADUS] Plasma parameters derived near Enceladus
| | |
| | |- RPWS_LP_E_yyyyddd_Enn_Vm.LBL
| | |- RPWS_LP_E_yyyyddd_Enn_Vm.TAB
| | Label and ASCII table files containing plasma
| | parameters including electron number density,
| | electron temperature, and spacecraft potential,
| | derived from RPWS LP sweeps in the vicinity of
| | Enceladus.
| |
| |- [NEPROXY] Complete proxy density and spacecraft potential
| | |
| | |- [TyyyydXX] Directory containing up to 100 days of files
| | |
| | |- RPWS_LP_NEPROXY_yyyyddd_Vm.LBL
| | |- RPWS_LP_NEPROXY_yyyyddd_Vm.TAB
| | Label and ASCII table files containing electron
| | number density and spacecraft potential. Density is
| | derived using an emperical relation between the probe
| | floating potential and CAPS measurements.
| |
| |- [SATURN] Plasma parameters derived near Saturn's inner
| | | magnetosphere
| | |
| | |- RPWS_LP_S_yyyyddd_nnn_Vm.LBL
| | |- RPWS_LP_S_yyyyddd_nnn_Vm.TAB
| | Label and ASCII table files containing plasma
| | parameters including electron number density,
| | electron temperature, and spacecraft potential,
| | derived from RPWS LP sweeps in the vicinity of
| | Saturn's inner magnetosphere.
| |
| |- [TITAN] Plasma parameters derived near Titan
| | |
| | |- RPWS_LP_T_yyyyddd_Tnn_Vm.LBL
| | |- RPWS_LP_T_yyyyddd_Tnn_Vm.TAB
| | Label and ASCII table files containing plasma
| | parameters including electron number density,
| | electron temperature, and spacecraft potential,
| | derived from RPWS LP sweeps in the vicinity of
| | Titan.
| |
| |- [UI] Complete set of calibrated voltage-current data
| |
| |- [TyyyydXX] Directory containing up to 100 days of files
| |
| |- RPWS_LP_UI_yyyyddd_Vm.LBL
| |- RPWS_LP_UI_yyyyddd_Vm.TAB
| Label and ASCII table files containing calibrated
| Langmuir probe sweep voltage-current points acquired
| almost continuously throughout the mission.
|
|- [DOCUMENT] Instrument paper, RPWS calibration document,
| RPWS users' guide.
|
|- [INDEX] Volume index of archive products.
==============================================================================
Contacts
==============================================================================
The person most directly responsible for the construction and release of this
archive volume is Mr. Steven Joy. He was the PPI Node Data Administrator at
the time this volume was created and understands as much about the volume
structure and data organization as anyone. Other PPI personnel who may be
aware of issues related to this archive volume include Dr. Jan-Erik Whalund,
Dr. William Kurth, and Dr. Raymond Walker, the PDS/PPI Node manager.
For questions or problems regarding this volume, please contact the PDS/PPI
operator:
Internet pds_operator@igpp.ucla.edu
Telephone (310) 206-6073
U.S. Mail PDS Operator
c/o Dr. Raymond Walker
3845 Slichter Hall
UCLA - IGPP
Los Angeles, CA 90095-1567
For questions regarding PDS Standards or other archive volumes available from
the PDS, please contact PDS Operator at the PDS Central Node (at JPL):
Internet pds_operator@jpl.nasa.gov
U.S. Mail Planetary Data System, PDS Operator
Jet Propulsion Laboratory
Mail Stop 202-101
4800 Oak Grove Dr.
Pasadena, CA 91109-8099
==============================================================================
Disclaimer
==============================================================================
The PDS and the Planetary Plasma Interactions (PPI) Node in particular, assume
no legal liability for errors on this volume. All users are encouraged to
verify the "correctness" of the data prior to submitting any publications or
other work based on these data. Errors on this volume should be reported back
to the PPI Node of the PDS through the ERRATA reporting procedures described
above.
==============================================================================
Acknowledgements
==============================================================================
These data were collected under the auspices of the Cassini Project. Donald A.
Gurnett was the Radio and Plasma Wave Science Principal Investigator. The
archiving effort at The University of Iowa was supported by L. Granroth and C.
Piker.
This archiving effort was supported by the Planetary Plasma Interactions Node
of the Planetary Data System. Assistance was provided by J. Mafi of the
University of California, Los Angeles.
==============================================================================
|