AndreaBozzo/ceres-open-data-index huggingface dataset:
ATLAS/ICESat-2 L3A Sea Ice Freeboard Quick Look V006

ATL10QL is the quick look version of ATL10. Once final ATL10 files are available the corresponding ATL10QL files will be removed.
ATL10 contains estimates of sea ice freeboard, calculated using three different approaches. Sea ice leads used to establish the reference sea surface and descriptive statistics used in the height estimates are also provided. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory.

Tags: cryosphere, earth-science, sea-ice
Organization: National Aeronautics and Space Administration
In-situ fatigue life prognosis for composite laminates based on stiffness degradation

In this paper, a real-time composite fatigue life prognosis framework is proposed. The proposed methodology combines Bayesian inference, piezoelectric sensor measurements, and a mechanical stiffness degradation model for in-situ fatigue life prediction. First, the composites stiffness degradation is introduced to account for the composites fatigue damage accumulation under cyclic loadings and a new growth rate-based stiffness degradation model is developed. Following this, the general Bayesian updating-based fatigue life prediction method is discussed. Several sources of uncertainties and the developed stiffness degradation model are included in the prognosis framework. Next, an in-situ composites fatigue testing with piezoelectric sensors is designed and performed to collected sensor signal and the global stiffness data. Signal processing techniques are implemented to extract damage diagnosis features. The detected stiffness degradation is integrated in the Bayesian inference framework for the remaining useful life (RUL) prediction. Prognosis performance on experimental data is validated using prognostics metric. Finally, some conclusions and future work are drawn based on the proposed study.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
RSW Mixed Element Cell-Centered Fine Mesh

This is a RSW mixed-element unstructured fine mesh for cell-centered solvers.

UG3      : Grid File Name    = rsw_fine_mixedcc.b8.ugrid
UG3      : Quad Surface Faces=     28968
UG3      : Tria Surface Faces=    239342
UG3      : Nodes             =  12002235
UG3      : Total Elements    =  27584618
UG3      : Hex Elements      =         0
UG3      : Pent_5 Elements   =     50183
UG3      : Pent_6 Elements   =  21941289
UG3      : Tet Elements      =   5593146
UG3      : BL Tet Elements   =     49651

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
GREECE -- Ground-to-Rocket Electrodynamics-Electrons Correlative Experiment: High resolution rocket and ground-based investigations of small-scale auroral structure and dynamics Project

&lt;p&gt;
	&lt;strong&gt;Methodology &lt;/strong&gt;The methodology is based on making comparisons between downward electron flux, DC electric fields, electromagnetic waves, and auroral morphology. The proposed project will launch a rocket from Poker Flat over Fort Yukon to an apogee of 200-300 km when arc or arcs are present that has optical shear-flows present. Data from downgoing electron fluxes over a large energy range, electron density (Langmuir probe), electric and magnetic fields from the in-situ rocket payload and images from all-sky and narrow field cameras at Poker Flat and Fort Yukon will be produced and analyzed. All instrumentation is selected so that high temporal resolution can be achieved. &amp;nbsp;&lt;/p&gt;

Tags: active, project, wallops-flight-facility
Organization: National Aeronautics and Space Administration
Aqua MODIS Level-3 Global Mapped 4µm Day/Night Sea Surface Temperature (SST4) - Near Real-time (NRT) Data, version R2019.0

The Ocean Biology DAAC produces near real-time (quicklook) products using the best-available combination of ancillary data from meteorological and ozone data. As such, the inputs and the calibration used are less than optimal. Quicklook products provide a snapshot of the data during a short time period within a single orbit.

Tags: earth-science, national-geospatial-data-asset, ngda, ocean-temperature, oceans
Organization: National Aeronautics and Space Administration
SENTINEL-1A_OCN

SENTINEL-1A Level 2 Ocean wind, wave and current data

Tags: agriculture, biosphere, coastal-processes, cryosphere, earth-science, erosion-sedimentation, forest-science, frozen-ground, geomorphic-landforms-processes, glaciers-ice-sheets, land-surface, land-use-land-cover, landscape, ocean-waves, ocean-waves-swells, ocean-waves-wave-fetch, ocean-waves-wave-spectra, ocean-waves-wind-waves, ocean-winds, ocean-winds-surface-winds, ocean-winds-turbulence, ocean-winds-wind-shear, oceans, sea-ice, snow-ice, solid-earth, surface-water, tectonics, terrestrial-ecosystems, terrestrial-hydrosphere, topography
Organization: National Aeronautics and Space Administration
Algorithms for Spectral Decomposition with Applications

The analysis of spectral signals for features that represent physical phenomenon is ubiquitous in the science and engineering communities. There are two main approaches that can be taken to extract relevant features from these high-dimensional data streams. The first set of approaches relies on extracting features using a physics-based paradigm where the underlying physical mechanism that generates the spectra is used to infer the most important features in the data stream. We focus on a complementary methodology that uses a data-driven technique that is informed by the underlying physics but also has the
ability to adapt to unmodeled system attributes and dynamics. We discuss the following four algorithms: Spectral Decomposition Algorithm (SDA), Non-Negative Matrix Factorization (NMF), Independent Component Analysis (ICA) and Principal Components Analysis (PCA) and compare their performance on a spectral emulator which we use to generate artificial data with known statistical properties. This spectral emulator mimics the real-world phenomena arising from the plume of the space shuttle main engine and can be used to validate the results that arise from various spectral decomposition algorithms and is very useful for situations where real-world systems have very low probabilities of fault or failure. Our results indicate that methods like SDA and NMF provide a straightforward way of incorporating prior physical knowledge while NMF with a tuning mechanism can give superior performance on some tests. We demonstrate these
algorithms to detect potential system-health issues on data from a spectral emulator with tunable health parameters.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
A Local Distributed Peer-to-Peer Algorithm Using Multi-Party Optimization Based Privacy Preservation for Data Mining Primitive Computation

This paper proposes a scalable, local privacy-preserving algorithm for distributed peer-to-peer (P2P) data aggregation useful for many advanced data mining/analysis tasks such as average/sum computation, decision tree induction, feature selection, and more. Unlike most multi-party privacy-preserving data mining algorithms, this approach works in an asynchronous manner through local interactions and therefore, is highly scalable. It particularly deals with the distributed computation of the sum of a set of numbers stored at different peers in a P2P network in the context of a P2P web mining application. The proposed optimization-based privacy-preserving technique for computing the sum allows different peers to specify different privacy requirements without having to adhere to a global set of parameters for the chosen privacy model. Since distributed sum computation is a frequently used primitive, the proposed approach is likely to have significant impact on many data mining tasks such as multi-party privacypreserving clustering, frequent itemset mining, and statistical aggregate computation.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
Sentinel-3B OLCI Level-3M Global Mapped Earth-observation Reduced Resolution (ERR) Remote-Sensing Reflectance (RRS) - Near Real-time (NRT) Data, version R2022.0

The Ocean Biology DAAC produces near real-time (quicklook) products using the best-available combination of ancillary data from meteorological and ozone data. As such, the inputs and the calibration used are less than optimal. Quicklook products provide a snapshot of the data during a short time period within a single orbit.

Tags: atmosphere, atmospheric-radiation, earth-science, ocean-optics, oceans
Organization: National Aeronautics and Space Administration
Human Robotic Systems (HRS): Controlling Robots over Time Delay Element

&lt;p&gt;This element involves the development of software that enables easier commanding of a wide range of NASA relevant robots through the Robot Application Programming Interface Delegate (RAPID) robot messaging system and infusing the developed software into flight projects.&amp;nbsp; In June and July of 2013, RAPID was tested on ISS as the robot messaging software for the Technology Demonstration Mission (TDM) Human Exploration Telerobotics (HET) Surface Telerobotics experiment.&amp;nbsp; RAPID has also been made available to &amp;mdash; and integrated with &amp;mdash; the Robot Operating System (ROS), a popular software framework for developing state-of-the-art robots for ground and space. While ROS powers a number of new robots and components such as Robonaut 2&amp;rsquo;s climbing legs and R5, the addition of RAPID allows these robots to interoperate in collaborative human-robot teams, safely and effectively over time-delayed communications links. The objective this year is to take this space-tested software and extend it to providing video streaming from remote robots and delivering this new capability to the Exploration Ground Data Systems (xGDS) area within HRS.&amp;nbsp; xGDS will then deliver its software to Science Mission Directorate (SMD) funded field tests to improve the technology readiness moving leading (potentially) to being used for the Lunar Prospector Mission ground data systems.&amp;nbsp; Success will involve delivering RAPID to xGDS and then xGDS supporting SMD field test.&lt;/p&gt;&lt;p&gt;The team is also developing algorithms for sensors capable of reconstructing remote worlds and efficiently shipping that remote environment back to earth using the RAPID robot messaging system.&amp;nbsp; This type of system could eventually lead to scientists on earth gain new insights as they are able to step into the remote world.&amp;nbsp; This sensor also has the ability to engage the public, bringing remote worlds back to earth.&amp;nbsp; During FY13, this task used science operations personnel from current SMD projects to objectively measure improvement in remote science target selection and decision-making based. The team continues to work with SMD projects to ensure that the technologies being developed are directly responsive to SMD project personnel needs. The objective of this work in FY14 is to expand the range of science operations tasks addressed by the technology, and to perform laboratory demonstrations for JPL/SMD stakeholders of the immersive visualization of data from a sensor using an SMD representative environment.&lt;/p&gt;&lt;p&gt;During 2014, the &amp;ldquo;Controlling&lt;em&gt; Robots Over Time Delay&amp;rdquo;&lt;/em&gt; project element will develop two technologies:&lt;/p&gt;&lt;ul&gt;&lt;li&gt;Develop RAPID robot messaging for unified cross-center operations platform for TDM, xGDS, and CCSDS&lt;/li&gt;&lt;li&gt;Sensor Systems for the Construction of Immersive Virtual Environments&lt;/li&gt;&lt;/ul&gt;

Tags: active, element, johnson-space-center
Organization: National Aeronautics and Space Administration
Earth Radiation area average time series through Wide-field-of-view nonscanner abroad Earth Radiation Budget Satellite Edition 4.1

ERBE_S10N_WFOV_SF_ERBS_AreaAverageTimeSeries is the Earth Radiation Budget Experiment (ERBE) through Earth Radiation Budget Satellite (ERBS) area average time series through Wide-field-of-view nonscanner abroad Earth Radiation Budget Satellite Edition 4.1 data product. Understanding the mean and variability of the Earth’s radiation budget (ERB) at the Top-of-Atmosphere (TOA) and surface is a fundamental quantity governing climate variability and, for that reason, NASA has been making concerted efforts to observe the ERB since1984 through two projects: ERBE and Clouds and the Earth's Radiant Energy System (CERES), that span nearly 30 years to date.The ERBE MEaSUREs project uses knowledge gained in the last 10 years through CERES data analyses and applies the knowledge to existing data to develop long-term (nearly 30 years) consistent and calibrated data product (TOA irradiances at the same radiometric scale) from multiple missions (ERBS and CERES). This project proposes to produce level 3 surface irradiance products that are consistent with observed TOA irradiances in a framework of 1D radiative transfer theory. Based on these TOA and surface irradiance products, a data product will be developed which contains the contribution of atmospheric and cloud property variability to TOA and surface irradiance variability. All algorithms used in the process are based on existing CERES algorithms. All data sets produced by this project will be available from the Atmospheric Science Data Center.

Tags: atmosphere, atmospheric-radiation, earth-science
Organization: National Aeronautics and Space Administration
SBU Micro Rain Radar 2 (MRR2) IMPACTS V1

The SBU Micro Rain Radar 2 (MRR-2) IMPACTS dataset consists of reflectivity, Doppler velocity, signal-to-noise ratio, spectral width, droplet size, Liquid Water Content, melting layer, drop size distribution, rain attenuation, rain rate, and radial velocity data collected during the Investigation of Microphysics and Precipitation for Atlantic Coast-Threatening Snowstorms (IMPACTS) field campaign. IMPACTS was a three-year sequence of winter season deployments conducted to study snowstorms over the U.S. Atlantic Coast (2020-2022). The campaign aimed to (1) Provide observations critical to understanding the mechanisms of snowband formation, organization, and evolution; (2) Examine how the microphysical characteristics and likely growth mechanisms of snow particles vary across snowbands; and (3) Improve snowfall remote sensing interpretation and modeling to significantly advance prediction capabilities. Both the MRR-2 and the MRR-PRO instruments were used to collect data for this dataset. The dataset files are available from January 1 through February 28, 2020 in netCDF-3 and netCDF-4/CF formats.

Tags: atmosphere, atmospheric-radiation, atmospheric-water-vapor, clouds, earth-science, precipitation, radar, spectral-engineering
Organization: National Aeronautics and Space Administration
TRMM Ground Validation Radar Site Rain Rate Map L2 1 hour 2 km V7 (TRMM_2A53UW) at GES DISC

This dataset is part of the University of Washington TRMM Ground Validation products.

Instantaneous rain rate cartesian grid based on baseUW and 2A54UW. Units are mm/hr. Min range is 17 km, max range is 150 km. Note that in the netCDF files, "alt" (altitude) is assigned the elevation angle of the lowest sweep (which is used to create baseUW) and "z_spacing" has no meaning.

A key component of the TRMM project is the Ground Validation (GV) effort which consists of collecting data from ground-based radar, rain gauges and disdrometers. The data is quality-controlled, and then validation products are produced for comparison with TRMM satellite products.

The four primary GV sites are:

+ Darwin, Australia; 
+ Houston, Texas; 
+ Kwajalein, Republic of the Marshall Islands;
+ Melbourne, Florida. 

A significant effort is also being supported at NASA Wallops Flight Facility (WFF) and vicinity to provide high quality, long-term measurements of rain rates (via a network of rain gauges collocated with National Weather Service gauges), as well as drop size distributions (DSD) using a variety of instruments, including impact-type Joss Waldvogel, laser-optical Parsivel, as well as two-dimensional video disdrometers.  DSD measurements are also being collected at Melbourne and Kwajalein using Joss-Waldvogel disdrometers.

Tags: atmosphere, earth-science, precipitation, radar, spectral-engineering
Organization: National Aeronautics and Space Administration
IceBridge ATM L1B Elevation and Return Strength with Waveforms V001

This data set contains spot elevation measurements with corresponding waveforms of Arctic and Antarctic sea ice, and Greenland, Antarctic Peninsula, and West Antarctic region ice surface acquired using the NASA Airborne Topographic Mapper (ATM) instrumentation. The data were collected as part of Operation IceBridge funded aircraft survey campaigns.

Tags: cryosphere, earth-science, glaciers-ice-sheets, infrared-wavelengths, spectral-engineering
Organization: National Aeronautics and Space Administration
Algorithms and their Impact on Integrated Vehicle Health Management - Chapter 7

This chapter discussed some of the algorithmic choices one encounters when designing an IVHM system. While it would be generally desirable to be able to pick a particular set of algorithms for a particular problem, the reality is a bit more complex. Depending on the budget, the performance requirements, the computational constraints, sensor availability, access to historical data, operational and environmental conditions, robustness to changing system configurations, algorithm maintenance needs, etc., no one algorithm will perform best in all situations. Indeed, it is necessary to evaluate these constraints during the algorithm design process and determine the best choice on a case-by-case analysis. The trade-offs between different choices are very real, and sometimes no solution can be found, which means that some of the constraints have to be relaxed. The simplest solution is generally preferred over a more complex one, but it is also important to consider that there is no free lunch. Finally, any health management solution also has to undergo verification and validation (V&V) and, in some cases, certification. Some of these issues are topics of other chapters in this book.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
Fabrication and Modeling of Carbon and Boron Nitride Nanotube Growth on Lightweight Substrates for Multi-Functional Composite Structures Project

&lt;p&gt;&amp;nbsp;Specific objectives are:&lt;/p&gt;&lt;ol&gt;&lt;li&gt;Develop the fabrication process for producing fuzzy fiber with desired&amp;nbsp;carbon nanotube (CNT) length leveraging current collaboration with MIT through the National Space Technology Fellowship (NSTRF).&lt;/li&gt;&lt;li&gt;Evaluate fuzzy fiber composites with tailored CNT length&lt;/li&gt;&lt;li&gt;Develop&amp;nbsp;Boron Nitride Nanotube (BNNT) capabilities to enable incorporation of vertically aligned BNNTs into composite structures for multifunctional composite structures.&lt;/li&gt;&lt;li&gt;Model nanotube length and loading requirements to maximize transport properties through the resin rich inter-ply region of a composite and verify the model from composite data with different CNT lengths.&lt;/li&gt;&lt;/ol&gt;

Tags: completed, glenn-research-center, project
Organization: National Aeronautics and Space Administration
OCO-2 Level 0 spacecraft ephemerides V11.2 (OCO2_Eph) at GES DISC

Version 11.2 is the current version of the data set. Older versions will no longer be available and are superseded by Version 11.2.

The Orbiting Carbon Observatory is the first NASA mission designed to collect space-based measurements of atmospheric carbon dioxide with the precision, resolution, and coverage needed to characterize the processes controlling its buildup in the atmosphere. The OCO-2 project uses the LEOStar-2 spacecraft that carries a single instrument. It incorporates three high-resolution spectrometers that make coincident measurements of reflected sunlight in the near-infrared CO2 near 1.61 and 2.06 micrometers and in molecular oxygen (O2) A-Band at 0.76 micrometers . Each band has 1016 spectral elements.This product contains the position and velocity of the spacecraft for each orbit. It is generated using the following input data:+ APID 20 telemetry+ Orbit Boundary File.It is essential in generating the Geolocations of the science data.

Tags: earth-science, platform-characteristics, spectral-engineering
Organization: National Aeronautics and Space Administration
Client-side Web Mining for Community Formation in Peer-to-Peer Environments

In this paper we present a framework for forming interests-based Peer-to-Peer communities using client-side web browsing history. At the heart of this framework is the use of an order statistics-based approach to build communities with hierarchical structure. We have also carefully considered privacy concerns of the peers and adopted cryptographic protocols to measure similarity between them without disclosing their personal profiles. We evaluated our framework on a distributed data mining platform we have developed. The experimental results show that our framework could effectively build interests-based communities.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
EnviroAtlas - San Diego, CA - Historic Places by Census Block Group

This EnviroAtlas dataset portrays the total number of historic places located within each Census Block Group (CBG). The historic places data were compiled from the National Register of Historic Places, which provides official federal lists of districts, sites, buildings, structures and objects significant to American history, architecture, archeology, engineering, and culture. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

Tags: ca, california, census block groups, communities, ecosystem, ecosystem services, enviroatlas, environment, environmental atlas, human well-being, recreation, san diego, society
Organization: U.S. Environmental Protection Agency
SMAP-Derived 1-km Downscaled Surface Soil Moisture Product V001

This data product contains global daily 1 km resolution surface soil moisture derived from the SMAP L-band radiometer. Specifically, MODIS land surface temperature data is used with the SMAP Enhanced L2radiometer Half-Orbit 9 km EASE-Grid Soil Moisture product in a downscaling algorithm to estimate soil moisture. The data set is validated by in situ soil moisture measurements from dense soil moisture networks representing different global land cover types.

Tags: earth-science, land-surface, soils
Organization: National Aeronautics and Space Administration