Volume PV10_0001 Pioneer Venus Orbiter - Venus Orbital Operations CD-ROM Retarding Potential Analyzer Datasets Orbits 1-1000 Planetary Plasma Interactions Node of the Planetary Data System ============================================================================== Introduction ============================================================================== This disk contains Venus Orbital Operations data submitted to the Planetary Data System (PDS) by PVO ORPA project investigators. Every effort has been made to assure that the data are of the best quality available. However, the PDS and the Planetary Plasma Interactions (PPI) Node in particular, assume no liability for this disk or its contents. All users are encouraged to verify the "correctness" of the data prior to submitting any publications or other work based on these data. Brief Disk Description This CD-ROM is organized into 6 principal sub-directories. These are as follows: CATALOG Contains PDS Catalog templates which contain information describing the mission, spacecraft, instruments, data sets, personnel, and references. DATA Contains the data sub-directories. DOCUMENT Contains complete 'official' versions of documents published in other sources and contained on this volume (including copyright notices, and GIF image representations of figures and tables). Please note that full or partial copies of these documents may appear elsewhere on the CD-ROM. INDEX Contains a complete index of all files of interest including file location and associated data sets. MANAGE Contains DITDOS inventory files which PPI node uses for making this volume available on its website. SOFTWARE Contains a description of software useful for viewing or manipulating data found on this volume, plus instructions for obtaining it. For a more detailed description of these sub-directories, please refer to the "Volume Contents and Structure" section below. Novice users, however, can ignore all directories and files except for those mentioned in the following description of "Important Files and Directories." Important Files and Directories This CD-ROM contains data for orbits 1-1000 covering the time period between 1978-12-05 to 1981-08-03. All data files are stored in the "DATA" branch of the directory tree. All the data, except for the low resolution data, are stored in IEEE binary (.DAT) files, the low resolution data are stored in ASCII (.TAB) files. All are 1 file per orbit. The content of each data file is described by a detached PDS label file (.LBL). The internal structure or format of each data set is described by a single format file (.FMT) which is pointed to (^STRUCTURE). The file DATASET.TXT, found in each sub-directory which contains data, provides additional information about the data which it accompanies. Users of this disk should read the INFO.TXT file located in the DATA directory which explains where each type of data is located. INFO.TXT files, which are located in each data sub-directory, describe the data found in that directory Although the INFO.TXT files can be quite large they contain the most relevant information first. They begin by describing the type of data in the directory, the days covered, and the names of the most useful user files. Next the file naming conventions are described and the structure of the data files is given. More detailed information about each data file is then given. ============================================================================== Volume Set Information ============================================================================== This CD-ROM is disk 1 of 3 in the PV10_000x series. This volume set contains 1 processed datasets comprised of 4 components: 1) Thermal Electron, 2) Ion (which contains uncertainties), 3) Photoelectron, and 4) Low Resolution data (density, temperature, S/C potential - originally submitted as UADS data). Spacecraft position or trajectory data can be found either on the PVO SEDR data volumes (PV04_xxxx), or on the OMAG/OEFD processed data (PV01_xxxx) volume series. Volume 1 contains orbits 0001-1000 (198X-XX-XX to 199X-XX-XX) Volume 2 contains orbits 1001-3000 (198X-XX-XX to 199X-XX-XX) Volume 3 contains orbits 3001-5055 (199X-XX-XX to 1992-10-07) All three volumes in this series have an identical structure and duplicates of documents, templates, etc. ============================================================================== Documents ============================================================================== This CD-ROM contains documents (consisting of text and, in some cases, images) which have been extracted from the original documentation. All copyright protections associated with these documents are retained by the publishers. All occurrences on this CD-ROM of documents originally published by Kluwer Academic Publishers and by IEEE contain their respective copyright permissions statements in their text in some form: Reprinted with permission of Kluwer Academic Publishers. or Copyright (c) 1980 IEEE. Reprinted, with permission, from IEEE Transactions on Geoscience and Remote Sensing, GE-18, Num. 1, 60-65, Jan. 1980. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of PDS's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new ccollective works for resale or redistribution must be obtained from the IEEE by sending a blank e-mail message to info.pub.permission@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it. Users of this CD-ROM and/or the Planetary Data System are required to comply with the copyright laws governing the usage of these and any other copyrighted materials on the disk. ============================================================================== Errata ============================================================================== There may be a file called ERRATA.TXT found at the root level of this volume which contains a list of changes and errors if there are any at the time this CD was published. This is a list of cumulative changes made to any ORPA CD-ROM (volume set PV10) created by this production date. Any changes or errors that were found to any PV10 CD-ROM after the production of this volume can be found via anonymous-ftp at pdsppi.igpp.ucla.edu. The account name is anonymous, but please provide your e-mail address when prompted for a password (to leave an audit trail). Change to the PDS errata directory (cd pds/ERRATA/PV10), and transfer the file ERRATA.TXT (get ERRATA.TXT). Changes can also be found through our web site at http://www.igpp.ucla.edu/igpp/ditdos.exe through the data access system. ============================================================================== File Format ============================================================================== All files on this disk are time series data described by detached version 3.2 PDS labels. PDS labels are identified by a .LBL file name extension. There is one label file for each text and data file contained on this disk and the file name prefix is the same as the file the label describes. The data directories contain multiple time series data files all with an identical structure. There is an ASCII text format file which describes the physical structure of the data files. This format file is then pointed to by all of the labels. Both the label files (.LBL) and the format files (*.FMT) are all located in the same directory as the data files they describe. ============================================================================== Volume Contents and Structure ============================================================================== The tree diagram below shows the root directory (including its top level sub-directories), plus the top level of the /DATA sub-directory only. It also provides a brief summary of directory contents and a list of key files. Note that all files are not listed. Each file on this CD-ROM (with the exception of *.CAT files) is accompanied by a PDS label file (.LBL) which describes the content and characteristics of the associated file. For more detailed information, please refer to the *INFO.TXT file located on every directory below the root. Square brackets ([]) denote directories. Please note also that the 'DATA' directory is listed out of alphabetical order for the sake of readability PV10_0001 (root directory) | |- AAREADME.TXT describes volume contents, organization and use | (this file) | |- AAREADME.LBL detached PDS label for AAREADME.TXT | |- VOLDESC.CAT high level description of volume contents | | |- [CATALOG] Contains metadata associated with this CD-ROM, | including mission, instrument host (spacecraft), | instrument, data set, personnel and reference | descriptions and information (*.CAT files). The file | CATINFO.TXT contains a more detailed description of | individual catalog file naming and contents. | |- [DOCUMENT] Contains 4 documents which are considered important to | the understanding of these and other PVO charged particle | experiment datasets. Each document is stored in its own | directory and has been converted to an ASCII text file | (without any graphics). In addition, two of the | documents have been scanned electronically and stored | as HTML files (images are GIF). In addition, Fortran | code which was used to create this data from the EDRs is | included in this section as reference to this process. | For more information refer to DOCINFO.TXT contained in | the /DOCUMENT directory or one off the INFO.TXT files | contained in each subdirectory. | |- [INDEX] Contains a cumulative index (CUM_INDX.TAB) which | describes the location of all files on the PV10 | collection (PVO-ORPA). In addition, there is a | file (INDEX.TAB) which gives the name and location of | all files on this volume. These index files have been | provided for users who do not wish to make use of the | DITDOS software. The index files are described by | detached PDS labels. | |- [MANAGE] Contains 'DITDOS' data management information for this | CD-ROM. The PDS/PPI nodes uses the DITDOS software to | make data from this CD-ROM available on its website. | Contains no user files. | |- [SOFTWARE] Contains software to assist Windows 95 users in visualizing | data organization and rendering the data. The PDS Explorer | tool is designed to have a similar look and feel to the | Microsoft Windows Explorer. It displays directory contents | and provides a simple point and click means of navigating | through the CD-ROM. The Explorer provides access to various | rendering tools such as Textview (to display text files) | and the SPLASH software which provides graphics capability | for ordered data files. SPLASH has a simple wizard | interface to assist users in producing data plots. Please | refer to the file SOFTINFO.TXT for more information on | specific software, or information on how to obtain any | other software that may be available. | |- [DATA] Contains 4 sub-directories, each containing data files | for a different PVO ORPA component. Each data file | (.TAB for ASCII and .DAT for binary) is accompanied | by PDS label file (.LBL) which describes data file | contents. A single format file (.FMT) describes data file | internal structure or record format. Other documentation | includes and instrument description (INST.TXT) and data | set description (DATASET.TXT). While some of this | information is repeated in the CATALOG and DOCUMENT | directories, it is provided in the /DATA directory for | the convenience of the data user. Please refer to the | INFO.TXT, which is found in each sub-directory for more | information. | |- [ION] Reduced ion mode sweeps (which contains uncertainties) | (sub-directories containing 100 orbits of data and | uncertainties) | |- [LOW_RES] Low Resolution data (density, temperature, S/C potential) | (sub-directories containing 100 orbits) | |- [PHOTOELE] Reduced photoelectron mode sweeps | (sub-directories containing 100 orbits) | |- [THRM_ELE] Reduced thermal electron mode sweeps | (sub-directories containing 100 orbits) Data files are named using the orbit number of the file. Files whose names are Orbit numbers begin with the letters "ORB" and give the orbit in the format ORBXXXX. If the number of files within a single sample rate directory would exceed the ISO 9660 CD-ROM standard of 255, an additional directory level is added. This level is given an orbit count name which follows the convention just described. In this case, the directory is given the same name as the first file in that directory. ============================================================================== Software ============================================================================== The Planetary Plasma Interactions (PPI) Node of NASA's Planetary Data System (PDS) provides software to facilitate the location of the data of interest on CD-ROM data products, as well as software to convert data between architecture specific data formats. In addition, the PPI Node provides software which has been made available by individual projects which may be useful when working with PPI data. Non-PDS software is provided "as is" and is distributed by the PPI Node as a service to the community. This disk contains software to assist Windows 95 users in visualizing data organization and rendering the data. The PDS Explorer tool is designed to have a similar look and feel to the Microsoft Windows Explorer. It displays directory contents and provides a simple point and click means of navigating through the CD-ROM. The Explorer provides access to various rendering tools such as Textview (to display text files) and the SPLASH software which provides graphics capability for ordered data files. SPLASH has a simple wizard interface to assist users in producing data plots. Please contact pds_operator@igpp.ucla.edu or check the latest version of this CD-ROM located on the PDS/PPI website (http://www.igpp.ucla.edu/ssc/pdsppi/Welcome.html) for software which may have become available subsequent to the release of this volume. ============================================================================== Contacts ============================================================================== If the user has problems reading this disk or can not make use of it on one or more of the platforms which should be supported, please contact the PPI pds_operator. This person can be reached in the following ways: Internet pds_operator@igpp.ucla.edu SPAN/DEC-NET uclasp::pds_operator Telephone (310) 206-6073 U.S. Mail PDS Operator c/o Dr. Raymond Walker 3845 Slichter Hall UCLA - IGPP Los Angeles, CA 90024-1567 ============================================================================== Cognizant Persons ============================================================================== The person most directly responsible for the construction and release of this CD-ROM is Mr. Steven Joy. He was the PPI Node Data Administrator at the time this disk was created and he understands as much about the disk structure and data organization as anyone. The construction of the PDS labels and templates was done by Ms. Eva Fried of the PPI Node and verified by Mr. Tyler Brown of the Central Node at JPL. PPI Personnel JPL Personnel Ray Walker / Steve Joy Eva Fried / Todd King Tyler Brown / Mike Martin 3845 Slichter Hall 4800 Oak Grove Dr. UCLA - IGPP Mail Stop 525-389 Los Angeles, CA 90024-1567 Pasadena, CA 91109 (310)206-6073 (818)306-6130 pds_operator@igpp.ucla.edu pds_operator@jplpds.jpl.nasa.gov