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DAWN VIR RAW (EDR) CRUISE CHECKOUT/CALIB IR SPECTRA V1.0

This data set contains the digital numbers (DN) contained in the telemetry (TM) packages of the VIR-IR instrument on board of the spacecraft DAWN. The data are from the cruise phase from launch to Vesta (Sep 2009-May 2011), and Vesta to Ceres (Sep 2012-Dec 2014).

DAWN VESTA GRAVITY SCIENCE DERIVED SCIENCE DATA V2.0

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 GRAND MAP VESTA HYDROGEN ABUNDANCE V1.0

A global map of the abundance of hydrogen in micrograms/g within the regolith of asteroid 4 Vesta is provided for two-degree equal-angle pixels. Hydrogen abundances were determined from epithermal neutron counting data acquired 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 abundances 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 hydrogen abunance are described by PRETTYMANETAL2012.

DAWN CERES RAW GRAVITY SCIENCE V2.0

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 Ceres. 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 Ceres. Of most interest are likely to be the Orbit Data Files in the ODF directory and Tracking and Navigation Files in the TNF 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.

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CPEX-CV DAWN Doppler Aerosol WiNd Lidar

CPEXCV-DAWN_DC8_1 are the Doppler Aerosol WiNd lidar (DAWN) image and NetCDF data files collected during the Convective Processes Experiment - Cabo Verde (CPEX-CV) onboard the DC-8 aircraft. Data collection for this product is complete. Seeking to better understand atmospheric processes in regions with little data, the Convective Processes Experiment – Cabo Verde (CPEX-CV) campaign conducted by NASA is a continuation of the CPEX – Aerosols & Winds (CPEX-AW) campaign that took place between August to September 2021. The campaign will take place between 1-30 September 2022 and will operate out of Sal Island, Cabo Verde with the primary goal of investigating atmospheric dynamics, marine boundary layer properties, convection, the dust-laden Saharan Air Layer, and their interactions across various spatial scales to improve understanding and predictability of process-level lifecycles in the data-sparse tropical East Atlantic region. CPEX-CV will work towards its goal by addressing four main science objectives. The first goal is to improve understanding of the interaction between large-scale environmental forcings such as the Intertropical Convergence Zone (ITCZ), Saharan Air Layer, African easterly waves, and mid-level African easterly jet, and the lifecycle and properties of convective cloud systems, including tropical cyclone precursors, in the tropical East Atlantic region. Next, observations will be made about how local kinematic and thermodynamic conditions, including the vertical structure and variability of the marine boundary layer, relate to the initiation and lifecycle of convective cloud systems and their processes. Third, CPEX-CV will investigate how dynamical and convective processes affect size dependent Saharan dust vertical structure, long-range Saharan dust transport, and boundary layer exchange pathways. The last objective will be to assess the impact of CPEX-CV observations of atmospheric winds, thermodynamics, clouds, and aerosols on the prediction of tropical Atlantic weather systems and validate and interpret spaceborne remote sensors that provide similar measurements. To achieve these objectives, the NASA DC-8 aircraft will be deployed with remote sensing instruments and dropsondes that will allow for the measurement of tropospheric aerosols, winds, temperature, water vapor, and precipitation. Instruments onboard the aircraft include the Airborne Third Generation Precipitation Radar (APR-3), lidars such as the Doppler Aerosol WiNd Lidar (DAWN), High Altitude Lidar Observatory (HALO), High Altitude Monolithic Microwave Integrated Circuit (MMIC) Sounding Radiometer (HAMSR), Advanced Vertical Atmospheric Profiling System (AVAPS) dropsonde system, Cloud Aerosol and Precipitation Spectrometer (CAPS), and the Airborne In-situ and Radio Occultation (AIRO) instrument. Measurements taken by CPEX-CV will assist in moving science forward from previous CPEX and CPEX-AW missions, the calibration and validation of satellite measurements, and the development of airborne sensors, especially those with potential for satellite deployment.

DAWN SPICE KERNELS V1.0

This data set includes the complete set of DAWN SPICE data files (``kernel files''), which can be accessed using SPICE software. The SPICE data contain geometric and other ancillary information needed to recover the full value of science instrument data. In particular SPICE kernels provide spacecraft and planetary ephemerides, instrument mounting alignments, spacecraft orientation, and data needed for relevant time conversions.

DAWN GRAND CALIBRATED MARS FLYBY COUNTS V1.0

The GRaND RDR are a time-ordered collection of corrected gamma ray and neutron counting data and calibrated pulse height spectra acquired by GRaND during all phases of the Dawn mission. This data set is specific to Mars Gravity Assist (MGA), and includes data acquired during Mars approach and flyby. The RDR is a calibrated data set derived from the Experiment Data Records (EDR), consisting of time-series counting rates from which elemental abundances can be determined. Ancillary ephemeris and pointing data needed for analysis and mapping of the time series data are included in the data set.

DAWN VIR RAW (EDR) CERES INFRARED SPECTRA V1.0

This volume contains the digital numbers (DN) contained in the telemetry (TM) packages of the VIR-IR instrument on board of the spacecraft DAWN. The data are from the Ceres Encounter and Extended mission phases, which occurred 2014-12-26 to 2017-04-29.

DAWN FC2 CALIBRATED VESTA 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 Vesta Encounter (Approach, Survey, Transfer to HAMO, HAMO, Transfer to LAMO, LAMO, Transfer to HAMO2, HAMO-2, and Transfer to Ceres). 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 needed for further processing are archived as a separate data set.

DAWN FC2 RAW (EDR) VESTA 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 Vesta Encounter (Approach, Survey, transfer to HAMO, HAMO, transfer to LAMO, LAMO, transfer to HAMO2, HAMO-2, and departure). 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 FC1 RAW (EDR) CRUISE CHECKOUT/CALIBRATION IMAGES V1.0

Abstract ======== Framing Camera 1 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 VIR CAL (RDR) CRUISE CHECKOUT/CALIB VIS SPECTRA V1.0

This data set contains the spectral radiance (W/(m**2*sr*micron)) data from the Dawn VIR instrument VIS channel for all cruise mission phases. The data are from the cruise phase from launch to Vesta (Sep 2009-May 2011), and Vesta to Ceres (Sep 2012-Dec 2014).

DAWN VIR RAW (EDR) VESTA INFRARED SPECTRA V1.0

This volume contains the digital numbers (DN) contained in the telemetry (TM) packages of the VIR instrument on board of the spacecraft DAWN. The data are from the Vesta Encounter phase, which occurred 2011-05-03 to 2012-07-18.

DAWN CERES 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 Ceres. 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 Ceres's gravity field generated by the Jet Propulsion Laboratory and gravity maps; these results were derived from raw radio tracking data.

DAWN VIR RAW (EDR) VESTA VISIBLE SPECTRA V1.0

DAWN CERES SPC SHAPE MODEL V1.0

The shape model of 1 Ceres derived from Dawn Framing Camera images using the Stereo-photoclinometry method. The model is provided in the implicitly connected quadrilateral (ICQ). This version of the model was prepared on October 19, 2018.

DAWN VIR CAL (RDR) CRUISE CHECKOUT/CALIB IR SPECTRA V1.0

This data set contains the spectral radiance (W/(m**2*sr*micron)) data from the Dawn VIR instrument IR channel for all cruise mission phases. The data are from the cruise phase from launch to Vesta (Sep 2009-May 2011), and Vesta to Ceres (Sep 2012-Dec 2014).

DAWN VIR CAL (RDR) CERES 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 Ceres encounter mission phases. The data cover the time period between 2014-12-26 and 2017-04-29.

DAWN GRAND MAP CERES SMOOTHED HYDROGEN MAP V1.0

A smoothed, global map of the concentration of hydrogen within the regolith of asteroid 1 Ceres on two-degree equal-angle pixels is provided. Hydrogen concentrations were determined from thermal+epithermal neutron counting data acquired by the NASA Dawn mission's Gamma Ray and Neutron Detector (GRaND) while in low altitude mapping orbit, about 385 km from Ceres' surface (about 0.8 body radii altitude). The concentrations are representative of Ceres's bulk regolith to depths up to a few decimeters with a spatial resolution of about 600-km full-width-at-half-maximum of arc length on the surface. The methods used to determine hydrogen concentration are described by PRETTYMANETAL2017.

DAWN FC1 CALIBRATED CRUISE CHECKOUT/CALIB IMAGES V1.0

Abstract ======== Framing Camera 1 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 initial checkout and pre-Vesta cruise phases (Checkout, Earth to Mars, and Mars to Vesta). As in the original Raw data sets, in addition to the imagery, ancillary information is stored within the image headers, as well as a detailed account of all the reference files used for the calibration. Calibration files needed for further processing are archived as a separate data set.