PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM ^TEXT = "AAREADME.TXT" OBJECT = TEXT PUBLICATION_DATE = 2010-05-05 NOTE = "AAREADME.TXT describes this volume." END_OBJECT = TEXT END Voyager 1 at SATURN VG1-S-RSS-1-ROCC-V1.0 1980-11-13T00:00:00 to 1980-11-13T23:59:59 Introduction ============ This volume contains archival raw, partially processed, and ancillary/supporting data acquired during the Voyager 1 (VG1) egress radio occultation and ring scattering experiment at Saturn. Observations were carried out using the VG1 spacecraft and the DSS 63 Earth-based receiving station of the NASA Deep Space Network (DSN) near Madrid (Spain). The observations were designed so that physical structure of Saturn's atmosphere (including surface temperature and pressure) and the nature of Saturn's ring system and its particles could be determined. The data also allowed estimation of Saturn's radius and inference of magnetic field orientation in the upper ionosphere. The spacecraft S- and X-band carrier signals served as coherent signal sources, probing the atmosphere at various depths and the ring system at increasing radial positions. During the ring scattering experiment, the radio signals were first transmitted through the rings (diffuse transmission) and later reflected from the rings (diffuse reflection). Output from four DSN receivers (right- and left circular polarization at both S- and X-band) was sampled and recorded for later analysis. Two recording systems were used, running in parallel with staggered start/stop times. The original data tapes were converted to computer-compatible tapes (CCTs) later at the NASA Jet Propulsion Laboratory. The data from these CCTs (with names of the form VJnnnn) represent the primary archival product here. Brief Volume Description ---------------------- This data set is organized into 8 principal sub-directories: CATALOG PDS catalog templates describing the Voyager mission, spacecraft, instruments, data sets, key personnel and references DATA contains the raw data files from VG1 RSS DOCUMENT documents describing instruments, data sets, or software contained on this volume GEOMETRY contains ephemerides and high-gain antenna pointing data INDEX index of all user files contained on this volume BROWSE Contains browse plots depicting the data EXTRAS additional information and software CALIB contains files of receiver tuning data More information on directory structure is contained in the section entitled 'Volume Contents and Structure.' Novice users, however, may ignore all files and directories except for the 'Important Files and Directories' listed below. Important Files and Directories ------------------------------- The content of each data file is described by a detached PDS label file (.LBL). The INFO.TXT provides additional information about data set and directory contents. An *INFO.TXT file (e.g. CATINFO.TXT, etc.), containing a description of the directory tree and sub-directory contents, is located in every directory immediately below the root. The INFO.TXT files provided on selected data sub-directories contain detailed descriptions of the directories on which they are located. Documents ========= The documents provided on this volume (in the /DOCUMENT sub-directory) include copyrighted materials previously published in Space Science Reviews, Vol. 21, No. 2, pp. 77-101, November 1977, and Space Science Reviews, Vol. 21, No. 3, pp. 235-376, December 1977. These materials appear on this volume with the permission of Kluwer Academic Publications (Kluwer). Kluwer retains Copyright over these articles. Please see the Copyright statement appearing at the beginning of each of the Space Science Reviews articles. File Formats ============ All of the label, table, and text files are ASCII format. All files in this volume are described by detached or combined detached PDS labels. PDS labels have a file extension of '.LBL' and generally have the same name as the file which it describes. All PDS label files in this volume are completely PDS Standards Version 3.8 compliant. This volume contains copies of documents associated with the data provided. These documents are reproduced in both plain ASCII text (.ASC) and PDF(.PDF) versions. Errata ====== For a description of any errors known at the time of the production of this volume, please refer to the file ERRATA.TXT found in the root directory. Volume Contents and Structure ============================= The tree diagram below provides a listing and brief description of the contents and key files of the root directory and instrument sub-directories of the /DATA directory. Note that some files may be omitted from this description. Each file in this volume (with the exception of *.CAT files) is associated with a PDS label file (.LBL) which describes its content and characteristics. For more information, please refer to the *INFO.TXT files located on each of the sub-directories of the root directory, or the INFO.TXT files located on the individual data sub-directories. Square brackets ([]) denote directories. VG1_9050 (root directory) | |- AAREADME.TXT describes volume contents and organization (this file) | |- ERRATA.TXT file describing errors and anomalies found in this | volume | |- VOLDESC.CAT high level description of volume contents | |-[CATALOG] Contains metadata associated with this volume including | mission, instrument host (spacecraft), instrument, | data set, personnel and reference descriptions and | information (*.CAT files) | |-[DOCUMENT] Contains mission, software, and instrument | sub-directories which contain documents relating to | the data set. | |-[GEOMETRY} contains ephemerides and high-gain antenna | pointing data | |-[CALIB} contains files of receiver tuning data | |-[BROWSE] contains snapshots of each data file | |-[INDEX] Contains a listing including file name and location, | for all user files contained in this volume. | |-[EXTRAS] Bonus content not necessarily conforming to | PDS archive standards. |-[DATA] Contains Voyager 1 Radio Science Subsystem (RSS) radio occulation data at Saturn Contacts ======== The person most directly responsible for the construction and release of this 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 structure and data organization as anyone. The construction of the PDS labels and templates was done by Mr. Joe Mafi. Other PPI personnel who may be aware of about issues related to this volume include Dr. Raymond Walker, the PDS/PPI node manager. For questions or problems regarding this Clime, please contact the PDS/PPI PDS operator: Email 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 90095-156704 For questions regarding PDS Standards or other volumes available from 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 4800 Oak Grove Drive Mail Stop 202-101 Pasadena, CA 91109