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238 results for “DAWN”
DAWN VIR CAL (RDR) VESTA VISIBLE SPECTRA V2.0
This data set contains the spectral radiance (W/(m**2*sr*micron)) data from the Dawn VIR instrument visible channel for all Vesta encounter mission phases. The data in this version of the data set have been produced using an updated calibration. The data cover the time period between 2011-05-03 and 2012-07-18.
DAWN FC2 DERIVED VESTA DTM SPG V1.0
Abstract ======== This data set contains the Vesta digital terrain model based on the Dawn High Altitude Mapping orbit (HAMO) Framing Camera 2 (FC2) images and derived by using the stereo photo-grammetric (SPG) method. The HAMO DTM covers approximately 95% of the Vesta surface (few permanently shadowed areas near the poles required interpolation). The a DTM has a lateral spacing of ~70 m/pixel (64.0 pixel/degree) and a vertical accuracy of +/-6 m.
DAWN FC2 RAW (EDR) CRUISE CHECKOUT/CALIBRATION IMAGES V1.0
Abstract ======== Framing Camera 2 is one of two identical units flying on Dawn spacecraft. This dataset includes the Experiment Data Record (EDR) version of all available images acquired during the initial checkout and all cruise phases (Earth to Mars, Mars to Vesta and Vesta to Ceres). In addition to the imagery, anciliary information is stored within the image headers. Calibration files needed for further processing are archived as a separate data set.
DAWN GRAND MAP CERES TPE NEUTRON COUNTS V1.0
A global map thermal+epithermal neutron counting rates binned on twenty-degree quasi-equal-area pixels is provided. The map was determined from a time series of the rate of neutron capture by lithium in the lithium-loaded glass scintillator, part of the +Z phoswich sensor on Dawn's Gamma Ray and Neutron Detector (GRaND). Neutrons in the thermal and epithermal energy range contribute to the reaction. The data were acquired while in low altitude mapping orbit, about 385 km from Ceres' surface (about 0.8 body radii altitude). Prior to mapping, the time series counting data were subjected to corrections for variations in the flux of galactic cosmic rays and measurement geometry, as described by PRETTYMANETAL2017.
DAWN GRAND MAP VESTA HEGR COUNTS V1.0
This data product describes a map of the high-energy gamma-ray (HEGR) count rate across the surface of Vesta. As shown in PEPLOWSKIETAL2013, HEGRS are sensitive to the bulk elemental composition of the near surface material, particularly its heavy major-element content.
NASA 3D Models: Dawn
This .stl file was produced by scaling the original model and converting it directly to .stl format.
DAWN VIR CAL (RDR) VESTA INFRARED SPECTRA V1.0
This data set contains the spectral radiance (W/(m**2*sr*micron)) data from the Dawn VIR instrument infrared channel for all Vesta encounter mission phases. The data cover the time period between 2011-05-03 and 2012-07-18.
DAWN VESTA RAW GRAVITY SCIENCE V1.0
This data set contains archival raw, partially processed, and ancillary/supporting gravity science data acquired during the Dawn mission while the spacecraft was in orbit around the asteroid Vesta. The radio observations were carried out using the Dawn spacecraft and Earth-based receiving stations of the NASA Deep Space Network (DSN). The data set was designed primarily to support generation of high-resolution gravity field models for Vesta. Of most interest are likely to be the Orbit Data Files in the ODF directory, which provided the raw input to gravity investigations, as well as the ionospheric and tropospheric media calibration files in the ION and TRO directories, respectively.
DAWN FC2 CALIBRATED CERES IMAGES V1.0
Abstract ======== Framing Camera 2 is one of two identical units flying on Dawn spacecraft. This dataset includes the Reduced Data Record (RDR) version of all available images acquired during the Ceres Encounter (Approach, Survey, HAMO, and LAMO and the Ceres extended mission phases (XMO1-4). In addition to the imagery, anciliary information is stored within the image headers, as well as a detailed account of all the reference files used for the calibration. Calibration files used during processing are archived as a separate data set.
DAWN GRAND MAP VESTA NEUTRON ABSORPTION V1.0
A global map of a unitless compositional parameter, delta-C_perpendicular (DCP), and propagated 1-sigma uncertainties is provided. DCP varies linearly with the macroscopic thermal neutron absorption cross section of Vesta's regolith. An equation for converting tabulated DCP values to absorption units is provided in this document. DCP was determined from thermal and epithermal neutron counting rates measured by the NASA Dawn mission's Gamma Ray and Neutron Detector (GRaND) while in low altitude mapping orbit, about 210 km from Vesta's surface. The measurements are representative of Vesta's bulk regolith composition to depths of a few decimeters with a spatial resolution of about 300-km full-width-at-half-maximum of arc length on the surface. The methods used to determine neutron absorption are described by PRETTYMANETAL2013.
DAWN FC2 CALIBRATED MARS FLYBY IMAGES V1.0
Framing Camera 2 is one of two identical units flying on Dawn spacecraft. This dataset includes the Reduced Data Record (RDR) version of all available images acquired during the Mars Flyby phase. As in the original Raw data sets, in addition to the imagery, anciliary information is stored within the image headers, as well as a detailed account of all the reference files used for the calibartion. Calibration files needed for further processing are archived as a separate data set.
DAWN GRAND RAW (EDR) MARS FLYBY COUNTS V1.0
The GRaND EDR are a time-ordered collection of gamma ray and neutron counting data and histograms acquired by GRaND during all phases of the Dawn mission. The dataset includes state-of-health data, such as temperature and voltage readings, needed for the analysis of the counting data. The EDR is 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.
DAWN VIR CAL (RDR) VESTA INFRARED SPECTRA V2.0
This data set contains the spectral radiance (W/(m**2*sr*micron)) data from the Dawn VIR instrument infrared channel for all Vesta encounter mission phases. The data in this version of the data set have been produced using an updated calibration. The data cover the time period between 2011-05-03 and 2012-07-18.
DAWN GRAND MAP VESTA FAST NEUTRON RESIDUAL V1.0
These data are maps of fast neutron residual count rates from the GRaND plus Z boron loaded sensor. The nominal fast neutron count rates were detrended using the GRaND epithermal neutron map to produced this residual map. The residual map is related to the average atomic mass on Vesta. Details of the map and data reduction are described in LAWRENCEETAL2013B.
DAWN FC2 CALIBRATION IMAGES V1.0
Abstract ======== Framing Camera 2 is one of two identical units flying on Dawn spacecraft. This dataset includes the image files to be used in the calibration of the raw data throughout the mission. These files represent the behaviour of each individual pixel with respect to dark current generation and pixel-to-pixel non-uniformity as a function of the filter. As these are elaborated image products, not obtained from a specific image acquisition, they do not have any ancillary data.
DAWN FC2 RAW (EDR) CERES IMAGES V1.0
Abstract ======== This data set includes the Experiment Data Record (EDR) version of all available images acquired during the Ceres Prime Mission (Approach, Transfer to Survey, Survey, HAMO, and LAMO),and extended missions 1 (XMO1, XMO2, XMO3, XMO4) and 2 (XMO6, XMO7). In addition to the imagery, ancillary information is stored within the image headers. Calibration files needed for further processing are archived as a separate data set.
DAWN GRAND RAW (EDR) VESTA COUNTS V1.0
The GRaND EDR are a time-ordered collection of gamma ray and neutron counting data and histograms acquired by GRaND during all phases of the Dawn mission. The dataset includes state-of-health data, such as temperature and voltage readings, needed for the analysis of the counting data. The EDR is 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.
DAWN VESTA GRAVITY SCIENCE DERIVED SCIENCE DATA V1.0
This data set contains archival results from gravity investigations conducted during the Dawn mission while the spacecraft was in orbit around the asteroid Vesta. Radio measurements were made using the Dawn spacecraft and Earth-based stations of the NASA Deep Space Network (DSN). The data set includes a spherical harmonic model of Vesta's gravity field generated by the Jet Propulsion Laboratory and radial gravity acceleration map; these results were derived from raw radio tracking data.
DAWN FC2 DERIVED CERES MOSAICS V1.0
Abstract ======== This accumulating data set includes Ceres global mosaics and quadrangles derived from images acquired by the Framing Camera 2 (FC2) on the NASA Dawn spacecraft. Global mosaics are provided in cylindrical and polar stereographic projections. The quadrangle mosaics use Mercator (equatorial), Lambert conformal (mid-latitude) and stereographic projections. Clear and color mosaics are provided for high altitude mapping orbit (HAMO) and clear filter mosaics only in the low altitude mapping orbit (LAMO) science phases. This data set spans three PDS archive volumes which were created at different times during the mission. Volume DWNCHCFC2_2 contains HAMO clear filter mosaics, DWNCHFFC2_2 contains HAMO color filter mosaics, and DWNCLCFC2_2 contains LAMO clear mosaics.
DAWN GRAND MAP VESTA GAMMA FE CORRECTED COUNTS V1.0
This data set provides tables of net counting rates of Fe gamma rays at 7.6 MeV measured by the BGO detector of Dawn's Gamma Ray and Neutron Detector acquired at the low altitude mapping orbit. The counting rates were normalized for variations of live time, solid angle of Vesta, and galactic cosmic ray intensity. They were also corrected for variations of neutron number density derived from thermal and epithermal neutron observations by GRaND (PRETTYMANETAL2013). The table contains the original Fe counting rates reported by YAMASHITAETAL2013.
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