PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 80 OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2017-03-02 NOTE = "N/A" END_OBJECT = TEXT END Mariner 9 Radio Science Derived Data Ionospheric Electron Density Profiles (MR9-M-RSS-5-ELEDENPROFILES-V1.0) Nov 14, 1971 to June 25, 1972 ============================================================================= INTRODUCTION ============================================================================= This dataset contains 114 ionospheric electron density profiles (EDS files) derived from Mariner 9 radio occultation data. The Mariner 9 electron density profiles have been published graphically in [KLIORE1972A], [KLIORE1972B], [KLIOREETAL1973], [ZHANGETAL1990], and [KLIOREETAL1992]. They were archived as microfilmed data tables and images at the National Space Science Data Center (NSSDC) as dataset PSPA-00141, and this archive is described further at http://nssdc.gsfc.nasa.gov/nmc/datasetDisplay.do?id=PSPA-00141. We requested data tables and plots of ionospheric properties as functions of radial distance for all occultations for which ionospheric peak properties were reported in [KLIOREETAL1972B] and [KLIOREETAL1973]. We assumed that the absence of reported peak properties for a given occultation meant that no useful ionospheric profile was delivered to the archive. This approach primarily selected ingress occultations with solar zenith angles less than 90 degrees, although a handful of the selected occultations have solar zenith angles between 90 and 100 degrees. Neutral properties, although present in the archive and available to other interested researchers, were not deemed useful for our purposes. Please read CATALOG/DATASET.CAT for the remainder of the data set description. ============================================================================= ERRATA ============================================================================= A cumulative list of errors and changes is maintained in the file ERRATA.TXT at the root level of each volume. ERRATA.TXT in higher numbered volumes (or higher version numbers) will have errors for earlier volumes. ============================================================================= DISC FORMAT ============================================================================= The disc is organized according to the PDS standard for "one data set, one volume." This file (AAREADME.TXT), a PDS volume object definition (VOLDESC.CAT), and the listing of errors and changes (ERRATA.TXT) are included at the root level. The following directories of descriptive material are also at the root level: CATALOG contains descriptive files for cataloging the data on this disc. INDEX contains index information (table of contents) on each of the data files included in this disc; it also includes a cumulative index to all files in this set of discs. The remaining directories at the root level contain data files and detached PDS labels. ============================================================================= FILE FORMAT ============================================================================= All files associated with this data set are stored as simple ascii tables with detached PDS labels. ============================================================================= SOFTWARE ============================================================================= No software is included with this data set. ============================================================================= DISCLAIMER ============================================================================= Although considerable care has gone into making this volume set, errors are possible. Reports of errors or difficulties would be appreciated. Please contact one of the persons listed below. ============================================================================= COGNIZANT PERSONNEL ============================================================================= The person most directly responsible for construction and release of this volume set was Paul Withers. He created the data files and the data set description contained in the DATA_SET.CAT file. Other PDS required files were either copied from existing archive products (MISSION.CAT, INST_HOST.CAT from the IMAGING Node Mariner 9 image archive) or created by Steven Joy of the PDS-PPI Node. Paul Withers Phone: 617 353-1531 e-mail: withers@bu.edu BOSTON UNIVERSITY 725 COMONWEALTH AVE BOSTON, MA 02215 USA Steven Joy Phone: 310 825-3506 e-mail: sjoy@igpp.ucla.edu UCLA 603 CHARLES E. YOUNG DRIVE, EAST Los Angeles, CA 90095-1567 USA