PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM ^TEXT = "Readme_Raw.txt" OBJECT = TEXT PUBLICATION_DATE = 2013-07-11 NOTE = "AAREADME.TXT describes this volume." END_OBJECT = TEXT END Volume DWNVGRD_1A Dawn GRaND Raw Level-1A Vesta Encounter Archive ============================================================================== Brief Disk Description ============================================================================== This volume contains data from the Dawn GRaND raw level-1A (EDR) Vesta Encounter dataset. This dataset includes a time-ordered collection of gamma ray and neutron counting data and histograms acquired by the GRaND instrument during the Dawn mission Vesta encounter phases: Vesta Approach, Survey, High Altitude Mapping Orbit (HAMO), Low Altitude Mapping Orbit (LAMO), HAMO2 (second HAMO that followed LAMO), and the transfer phases in between. Descriptions of how the GRaND data are organized can be found in the Software Interface Specification (SIS) and Data Processing documents (both in the DOCUMENT directory) and in Prettyman et al. (2011) Space Science Reviews, Vol. 163(1-4), pp. 371-459, http://dx.doi.org/10.1007/s11214-011-9862-0 NOTE: Reading the Science Plan (DOCUMENTS/SCIENCE_PLAN/DAWN_SCIPLAN_V4_4.PDF) is critical to the understanding of the Vesta observations and science objectives. Other critical documentation in the DOCUMENT directory include the volume SIS and calibration procedure. The Experiment Data Record (EDR) data are an intermediate data product derived from the Raw Data Records using reversible operations. All higher order data products are derived from the EDR. An automated pipeline is used to process the EDR from the Raw Data Records. All data are stored in the 'DATA' branch of the directory tree. In addition to the data files, anciliary information is stored in a separate PDS label (.LBL) file. Users of these data are encouraged to acknowledge both the PDS and the principal investigators of the instruments whose data is used in analysis in all publications. ============================================================================== Volume Set Information ============================================================================== This volume is part of the GRaND raw level-1A EDR data volume set. This volume set includes the following volumes: Volume ID Description -------------------------------------------------------- DWNXGRD_1A Dawn GRaND L1-A EDR cruise data DWNMGRD_1A Dawn GRaND L1-A EDR Mars flyby images DWNVGRD_1A Dawn GRaND L1-A EDR Vesta Encounter images DWNCGRD_1A Dawn GRaND L1-A EDR Ceres Encounter images ============================================================================== Mission Facts ============================================================================== The 'Dawn Vesta Science Phases' table below provides a list Dawn Vesta Encounter mission phase start dates. ------------------------------------------------------------------------------ Dawn Vesta Science Phases ------------------------------------------------------------------------------ start date (DOY) Phase Name (ID) ------------------------------------------------------------------------------ 2011-05-03 (123) VESTA SCIENCE APPROACH (VSA) 2011-08-11 (223) VESTA SCIENCE SURVEY (VSS) 2011-08-31 (243) VESTA TRANSFER TO HAMO (VTH) 2011-09-29 (272) VESTA SCIENCE HAMO (VSH) 2011-11-02 (306) VESTA TRANSFER TO LAMO (VTL) 2011-12-12 (346) VESTA SCIENCE LAMO (VSL) 2012-05-01 (122) VESTA TRANSFER TO HAMO 2 (VT2) 2012-06-15 (167) VESTA SCIENCE HAMO 2 (VH2) 2012-07-25 (207) VESTA TRANSFER TO CERES (VTC) ------------------------------------------------------------------------------ ============================================================================== File Formats ============================================================================== Additional documentation is generally located in the DOCUMENT directory. Note for Windows users: 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, do the following. In Windows Explorer, open the 'Tools' menu and select 'Folder Options'. Select the 'File Types' tab and select 'CAT' from the list. Press 'Change...' and then choose your prefered text editor or viewer. We do not know of any harmful effects this might have on the operating system or other programs, but do not guarantee it will be entirely safe to make this change. If problems occur, the change can be undone in the same 'File Types' window by changing the default application back to 'crypto shell extension'. ============================================================================== 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. DWNVGRD_1A (root directory) | |- Readme_Raw.txt Describes volume contents, and organization (this file) | |- [DATA] Contains the images. The images are divided up into separate | subdirectories by mission subphase, observation interval. | ============================================================================ Contacts ============================================================================ This volume was produced for the Planetary Data System (PDS) at the Small Bodies node. The data, and associated metadata were supplied by Dr. Thomas H. Prettyman, of the Planetary Science Institute. The volume was assembled at the Dawn Science Center (DSC), by Joseph N. Mafi. For question regarding the data, please contact Dr. Tom Prettyman of PSI: Email prettyman@psi.edu Telephone 520-622-6300 Mail Planetary Science Institute Albuquerque, NM USA