PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2018-11-01 NOTE = "N/A" END_OBJECT = TEXT END Volume DWNCVIR_2 Dawn VIR Derived Ceres Global Mosaics V1.0 Archive ============================================================================== Brief Volume Description ============================================================================== This data set contains global mosaics of the Dawn VIR band centers and depths of phyllosilicate absorption bands, located at 2.7 (OH band) and 3.1 microns (NH4 band), from the Ceres encounter. The data set was acquired during the Survey and Ceres Science RC3 (CSR) phases between 2015-04-25 and 2015-06-27. NOTE: Reading the Science Plan (located in the /DOCUMENT/SCIENCE_PLAN directory) is critical to the understanding of the Ceres observations and science objectives. Other critical documentation in the DOCUMENT directory include the volume SIS and calibration procedure. These data have been decompressed, decoded, and formatted into scientifically useful data structures from the original raw telemetry packets. These products, along with their required PDS documentation, form the level-1a data sets (EDRs). The EDRs are then calibrated using the procedure defined in the VIR_CALIBRATION document by using the calibration files found in the CALIB directory on the level-1b volumes. VIR data provided in radiance units were next converted into reflectance in order to calculate the spectral parameters, some of which are provided here as global mosaics (please refer to the file CATALOG/VIR_DDR_CERES_MOSAICS_DS.CAT for details on the method). All data files are stored in the 'DATA' branch of the directory tree. The data are organized into subdirectories by phase and activity. JPEG images of the data files can be found in the 'BROWSE' directory. A brief overview of the mission phases and activities (including the start times and names used in the DATA subdirectories is provided in the 'Dawn Science Observations' table below. ============================================================================== Mission Facts ============================================================================== The 'Dawn Science Observations' table below provides a partial list of scientific observations made by the Dawn instruments used to produce these mosaics. It includes the observation start date, the ID of the phase in which it occurred, the activity name, and a brief description. ---------------------------------------------------------------------------- Dawn Science Observations ---------------------------------------------------------------------------- Start Mission Activity Activity Date Phase Name Description ============================================================================ ---------------------------------------------------------------------------- 15-04-25 CSR CSR Ceres Science RC3 Phase (avg rng ~13600 km) ---------------------------------------------------------------------------- 15-04-25 CSR EQUATORIAL1 10 orb limb south observation imaging - 20 obs 15-05-01 CSR EQUATORIAL2 10 orb limb north observation imaging - 20 obs 15-05-04 CSR NORTH 5 orb north observation - 15 obs 15-05-05 CSR EQUATORIAL3 5 orb equatorial observation imaging - 15 obs 15-05-07 CSR SOUTH 5 orb south observation - 15 obs ---------------------------------------------------------------------------- 15-06-04 CSS SURVEY Ceres Science Survey Phase (range ~4850 km) ---------------------------------------------------------------------------- 15-06-04 CSS CYCLE1 Survey Cycle (orbit) 1 - 44 obs 15-06-08 CSS CYCLE2 Survey Cycle (orbit) 2 - 49 obs 15-06-11 CSS CYCLE3 Survey Cycle (orbit) 3 - 44 obs 15-06-14 CSS CYCLE4 Data lost to instrument reset, sci data lost 15-06-17 CSS CYCLE5 Survey Cycle (orbit) 5 VIS-Only - 51 obs 15-06-21 CSS CYCLE6 Survey Cycle (orbit) 6 VIS bad - 50 obs 15-06-24 CSS CYCLE7 Survey Cycle (orbit) 7 VIS-Only - 49 obs 15-06-27 CSS CYCLE8 Data lost to instrument reset, sci data lost ============================================================================== File Formats ============================================================================== The data files on this volume are PC binary floating point images described by detached PDS labels. The PDS label is an ASCII file containing information describing spacecraft, target, and observation parameters characterizing the associated data file. A data set description, instrument description, and other PDS documents are in .CAT files in the CATALOG directory. In more recent versions of the Microsoft Windows operating system the .CAT by default is reserved as 'Security Catalog.' The .CAT files contained in this volume are ASCII text files, and can be read by any form of text editor. To make Windows open files with this name extension as text files right click the .CAT file, select with and choose a text editor to open the file. Additional documentation is located in the DOCUMENT directory. ============================================================================== Errata ============================================================================== Every effort has been made to assure that the data and documentation are of the best possible quality. However, mistakes are inevitable. 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 volume was produced. ============================================================================== 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. DWNCVIR_V1B (root directory) | |- AAREADME.TXT Describes volume contents, and organization (this file) | |- ERRATA.TXT Describes known deficiencies or caveats in the data on | this volume. | |- VOLDESC.CAT High level description of volume contents. | |- [CATALOG] PDS catalog files containing information describing the | data, instrument, instrument personnel, relevant references, | the spacecraft, and mission. | |- [DATA] Contains the 4 data files and their labels. | |- [BROWSE] Contains JPEG images of the data files and their labels. | |- [DOCUMENT] Contains documents important to the understanding and use | of the data on this archive volume. | |- [INDEX] Contains a list of all data products on this volume. ============================================================================ Contacts ============================================================================ This volume was produced for the Planetary Data System (PDS) at the Small Bodies node. The images, and associated metadata were supplied by Dr. Angioletta Coradini at the Istituto Nazionale Di Astrofisica (INAF). The volume was assembled at the Dawn Science Center (DSC), by Joseph N. Mafi. For questions or problems regarding the volume, please contact Dr. Carol Neese at the PDS Small Bodies Node: Email neese@psi.edu Telephone 520-622-6300 Mail Carol Neese Planetary Science Institute 1700 E. Ft. Lowell, Ste. 106 Tuscon, AZ 85719-2395 USA For question regarding the data, please contact Dr. Maria Cristina De Sanctis at INAF: Internet mariacristina.desanctis@iaps.inaf.it Telephone +39 06 499344448 Mail Area di Ricerca di Tor Vergata via del Fosso del Cavaliere, 100 00133 Rome Italy For questions regarding PDS Standards or other archives available from the PDS, please contact PDS Operator at the PDS Engineering Node (at JPL): Email pds_operator@jpl.nasa.gov Telephone 818-354-4321 Mail Planetary Data System, PDS Operator Jet Propulsion Laboratory Mail Stop 202-101 4800 Oak Grove Dr. Pasadena, CA 91109-8099 USA The PDS assumes 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. Please report errors on this disk to the Small Bodies Node of the PDS through the ERRATA reporting procedures described above.