PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM ^TEXT = "AAREADME.TXT" OBJECT = TEXT PUBLICATION_DATE = 2017-04-07 NOTE = "AAREADME.TXT describes this volume." END_OBJECT = TEXT END Volume DWNXVIR_I1A Dawn VIR IR Raw Level-1A (EDR) Cruise Archive ============================================================================== Brief Disk Description ============================================================================== This volume contains the Dawn VIR IR raw level-1A (EDR) cubes from all of the Dawn cruise phases. These data were acquired to help determine the instrument alignment relative to the spacecraft, monitor instrument health, and periodically excercise mechanisms within the instrument such as the scan mirror and cryocooler. These data are not intended for science. NOTE: Reading the Science Plan (located in the /DOCUMENT/SCIENCE_PLAN directory) 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. 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). All cubes are stored in the 'DATA' branch of the directory tree. General information about the observation and its geometry are included in a detached PDS label. Housekeeping information has been included in a separate data table with its own PDS label. SPICE kernels are archived by the NAIF Node of the PDS. This volume contains a collection of SPICE metakernel (MK) files in the GEOMETRY directory. These MK's contain a list SPICE kernels that were used in processing the VIR data products, and are referenced in the data product labels. 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 VIR raw level-1A EDR data volume set. This volume set includes the following volumes: Volume ID Description -------------------------------------------------------- DWNXVIR_I1A Dawn VIR-IR L1-A EDR cruise data DWNXVIR_V1A Dawn VIR-VIS L1-A EDR cruise data DWNVVIR_I1A Dawn VIR-IR L1-A EDR Vesta data DWNVVIR_V1A Dawn VIR-VIS L1-A EDR Vesta data DWNCAVIR_I1A Dawn VIR-IR L1-A EDR Ceres Approach data DWNCAVIR_V1A Dawn VIR-VIS L1-A EDR Ceres Approach data DWNCSVIR_I1A Dawn VIR-IR L1-A EDR Ceres Survey data DWNCSVIR_V1A Dawn VIR-VIS L1-A EDR Ceres Survey data DWNCHVIR_I1A Dawn VIR-IR L1-A EDR Ceres HAMO data DWNCHVIR_V1A Dawn VIR-VIS L1-A EDR Ceres HAMO data DWNCLVIR_I1A Dawn VIR-IR L1-A EDR Ceres LAMO data DWNCLVIR_V1A Dawn VIR-VIS L1-A EDR Ceres LAMO data DWNC1VIR_I1A Dawn VIR-IR L1-A EDR Ceres Extended LAMO data DWNC1VIR_V1A Dawn VIR-VIS L1-A EDR Ceres Extended LAMO data DWNC2VIR_I1A Dawn VIR-IR L1-A EDR Ceres Extended Juling data DWNC2VIR_V1A Dawn VIR-VIS L1-A EDR Ceres Extended Juling data ============================================================================== Mission Facts ============================================================================== The 'Dawn Cruise Observations' table below provides a list of calibration observations made by the Dawn instruments. It includes the observation start date, the ID of the phase in which it occurred, the activity name, and a brief description. ------------------------------------------------------------------------------ Dawn Cruise Calibration Observations ------------------------------------------------------------------------------ Start Mission Activity Activity Date Phase Name Description ============================================================================== 07-09-27 ICO ICO Begin Initial Checkout ------------------------------------------------------------------------- 07-10-17 ICO FUNC VIR Functional Test 07-12-11 ICO STAR_CAL 33 IR & VIS Cubes centered on Arcturus ------------------------------------------------------------------------- 08-01-19 EMC EMC Begin Earth-Mars Cruise ------------------------------------------------------------------------- 08-04-07 EMC CAL Full scan/slew cubes of Canopus & Mars ------------------------------------------------------------------------- 09-03-23 MVC MVC Begin Mars-Vesta Cruise ------------------------------------------------------------------------- 09-12-03 MVC GEOCAL Scan/slew cubes of Canopus (IR) to compute mounting geometry - unsuccessful 10-04-26 MVC GEOCAL Scan/slew cubes of Canopus (IR) to compute mounting geometry - unsuccessful 10-05-10 MVC MMConfig 6Gb memory configuration test 10-07-21 MVC GEOCAL Scan/slew cubes of Canopus (IR) to compute mounting geometry - succeeded 11-03-15 MVC FUNC Pre-Vesta VIR Functional Test ------------------------------------------------------------------------- - 12-09-10 VCC VCC Begin Vesta-Ceres Cruise ------------------------------------------------------------------------- - 12-12-17 VCC FUNC VIR Functional Test 13-11-16 VCC FUNC VIR Functional Test 14-06-23 VCC FUNC VIR Functional Test ------------------------------------------------------------------------------ The first two geometry calibrations did not provide the data needed to determine the sensor alignments, primarily because the cubes acquired were not large enough to account for all of the pointing error and the targets were not observed. The ephemeris related pointing error can be especially large and unpredictable in a low thrust mission. ============================================================================== File Formats ============================================================================== The data cube files on this volume are binary. The housekeeping (HK) data files are ASCII tables. Both the binary cubes and ASCII HK data have 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. DWNVVIR_I1A (root directory) | |- AAREADME.TXT Describes volume contents, and organization (this file) | |- ERRATA.TXT Describes known deficiencies or caveats in the data or | 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 data. The DATA directory is subdivided into | separate subdirectories by mission phase, and observation | period. | |- [DOCUMENT] Contains documents important to the understanding and use | of the data on this archive volume. | |- [EXTRAS] Contains files which are not an official part of the | archive, and which may not conform with PDS standards, | but which may be of use to data users. | |- [GEOMETRY] Contains VIR SPICE metakernel (MK) files, listing the SPICE | kernels used in generating the data and data label files. | |- [INDEX] Contains a list of all data products on this volume and a a list0of geometric parameters associated with each product. ============================================================================ 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. Maria Cristina De Sanctis 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@iasf-roma.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.