PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2009-10-10 NOTE = "AAREADME.TXT describes this volume." END_OBJECT = TEXT END Venera 15 and Venera 16 Radio Occultation Experiment (ROE) Data Archive Planetary Plasma Interactions Node Planetary Data System ======================================================================== Introduction ======================================================================== This volume is under peer review and may contain errors, please use with caution. This volume contains the ionospheric electron density profiles (EDS files) derived from Venera 15 and 16 radio occultation data obtained by the Radio Occultation Experiment (ROE). This volume also contains documentation and other files relevant to the data set. A more complete description of the data set can be found in the V15_V16_DS.CAT file in the CATALOG directory of this volume. ======================================================================== Volume Format ======================================================================== This volume is located on a hard disk at the PPI Node. The files are available for electronic download. ======================================================================== File Formats ======================================================================== Each data file is accompanied by a detached PDS label file (*.LBL). This is an ASCII file describing the contents of the data file. For information about data file formats, please consult the file V15_V16_DS.CAT under the CATALOG directory of this volume. Catalog files (*.CAT) are ASCII files containing high-level information about the data, the instruments, the spacecraft, relevant personnel, and relevant literature references. The catalog files are located in the CATALOG directory on the volume. Further documentation is found in the DOCUMENT directory. In ASCII files with extensions *.CAT, *.TXT and *.LBL, each record is terminated by a carriage return (ASCII 13) character followed by a line feed (ASCII 10) character. Text files and detached label files contain 80-byte fixed-length ASCII records, with a carriage-return character (ASCII 13) in the 79th byte and a line-feed character (ASCII 10) in the 80th byte. This format allows the files to be read by MacOS, DOS, UNIX and VMS operating systems. Note that while both label and catalog files are ASCII, some operating systems will not recognize the .LBL and .CAT extensions as ASCII types. It may be necessary to either remap these extensions as ASCII in the system or text browser, or else to open the files from within the text browser. ======================================================================== Volume Contents ======================================================================== In the root directory, the AAREADME.TXT file (the file you are now reading) gives a general description of the volume and data. The ERRATA.TXT file describes any known errors or variances in the data. The VOLDESC.CAT file gives a high-level description of the contents of the volume. The DATA directory contains the data files and their PDS labels. For information on other directories on this volume, please consult the *INFO.TXT file under each directory. ======================================================================== Errata ======================================================================== Every effort has been made to ensure that the data and documentation are of the best possible quality. However, mistakes are inevitable. The Planetary Plasma Interactions (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. 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 it was published. If you find an error on this dataset, please report the error to the PDS Operator at the PPI Node of the PDS at the address or numbers listed under contacts below. ======================================================================== Contacts ======================================================================== For questions concerning these data products and documentation, contact: Planetary Plasma Interactions Node UNIVERSITY OF CALIFORNIA, LOS ANGELES INST. OF GEOPHYSICS AND PLANETARY PHYSICS 6707 GEOLOGY LOS ANGELES, CA 90095-1567 USA (310) 206-6073 WWW Site: http://pds-ppi.igpp.ucla.edu Email address: pds_operator@igpp.ucla.edu For questions regarding PDS Standards or other archive volumes available from the PDS, please contact PDS Operator at the PDS Central Node (at JPL): Email pds_operator@jpl.nasa.gov Telephone (818) 354-4321 U.S. Mail Planetary Data System, PDS Operator Jet Propulsion Laboratory Mail Stop 202-101 4800 Oak Grove Dr. Pasadena, CA 91109-8099 The PDS, and the Planetary Plasma Interactions Node in particular, assume no legal liability for errors on this disk. 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.