AndreaBozzo/ceres-open-data-index huggingface dataset:
DIAGNOSTIC/PROGNOSTIC EXPERIMENTS FOR CAPACITOR DEGRADATION AND HEALTH MONITORING IN DC-DC CONVERTERS

Studying and analyzing the ageing mechanisms of electronic components avionics in systems such as the GPS and INAV are of critical importance. In DC-DC power converter systems electrolytic capacitors and MOSFET’s have higher failure rates among the components. Degradation in the capacitors under varying operating conditions leads to high ripples output voltages and currents affecting downstream components leading to cascading faults. For example, in avionics systems where the power supply drives a GPS unit, ripple currents can cause glitches in the GPS position and velocity output, and this may cause errors in the Inertial Navigation (INAV) system, causing the aircraft to fly off course The work in this paper proposes a detail experimental and systematic study on analyzing the degradation phenomenon is electrolytic capacitors under high stress operating conditions. The output degradation is typically measured by an increase in ESR (Equivalent Series Resistance) and decrease in the capacitance value. We present the details of our accelerated ageing methodology along with analysis and comparison of the results.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
LAT 2-year Point Source Catalog

The Fermi Gamma-ray Space Telescope (Fermi) Large Area Telescope (LAT) is a successor to EGRET, with greatly improved sensitivity, resolution, and energy range. This web page presents the second full catalog of LAT sources, based on the first 24 months of survey data. For a full explanation about the catalog and its construction see the LAT 2-year Catalog Paper (also available on arxiv).

Tags: acd, balloon, bursts, cgro, compton, egret, energy, fermi, gamma, gamma-ray, glast, glast-ssc, gro, gssc, high-energy
Organization: National Aeronautics and Space Administration
VIIRS/JPSS1 Sea Ice Cover 6-Min L2 Swath 375m V002

This data set reports the location of sea ice cover derived from radiance data acquired by the Visible Infrared Imager Radiometer Suite (VIIRS) onboard the Joint Polar Satellite System's first satellite (JPSS-1). Following the approach used by MODIS, sea ice is detected using the Normalized Difference Snow Index.

Tags: cryosphere, earth-science, sea-ice
Organization: National Aeronautics and Space Administration
SENTINEL-1A_METADATA_SLC

Metadata for Sentinel-1A slant-range product

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-winds, oceans, sea-ice, snow-ice, solid-earth, surface-water, tectonics, terrestrial-ecosystems, terrestrial-hydrosphere, topography
Organization: National Aeronautics and Space Administration
IceBridge ATM L4 Surface Elevation Rate of Change V001

This data set contains surface elevation rate of change measurements derived from IceBridge and Pre-IceBridge Airborne Topographic Mapper (ATM) widescan elevation measurements data for Arctic and Antarctic missions flown under NASA's Operation IceBridge (OIB) and Arctic Ice Mapping (AIM) projects.

Tags: earth-science, land-surface, topography
Organization: National Aeronautics and Space Administration
MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Day V061

This global Level-3 (L3) data set provides daily daytime sea ice extent and ice surface temperature derived from the 'MODIS/Terra Sea Ice Extent 5-Min L2 Swath 1km' (https://doi.org/10.5067/MODIS/MOD29.061) product. Each data granule is a tile consisting of 10 x 10 degrees of data gridded to the Lambert Azimuthal Equal Area Scalable Earth Grid (EASE-Grid).

The terms "Version 61" and "Collection 6.1" are used interchangeably in reference to this release of MODIS data.

Tags: cryosphere, earth-science, national-geospatial-data-asset, ngda, sea-ice
Organization: National Aeronautics and Space Administration
ATLAS/ICESat-2 L3A Sea Ice Freeboard V006

This data set (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
A Systems Engineering Approach to Electro-Mechanical Actuator Diagnostic and Prognostic Development

The authors have formulated a Comprehensive Systems Engineering approach to Electro-Mechanical Actuator (EMA) Prognostics and Health Management (PHM) system development. The approach implements software tools to integrate simulation-based design principles and dynamic failure mode and effects analysis. It also provides automated failure mode insertion and propagation analysis, PHM algorithm design and verification, full dynamic simulations, code generation, and validation testing. This process aims to produce the appropriate fault detection and prediction algorithms needed for successful development of an EMA PHM system. 

As an initial use case, the developed approach was implemented to develop and validate a model-based, virtual sensor software package for landing gear EMA PHM. This effort included creation of a dynamic, component-level system model that can be used to virtually sense parameters, detect degradation, isolate probable root cause, and assess severity. This model is also used as a virtual test bed for performing fault insertion analysis to address algorithm development and experimental prioritization. The developed model was validated using data from a test stand, which was specifically constructed for EMA PHM development. The model-based predictor was then coupled with failure mode diagnostics, advanced knowledge fusion, and failure mode progression algorithms to form a complete prototype EMA PHM solution.

Reproduced by kind permission of MFPT (www.mfpt.org).

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
Investigating the Effect of Damage Progression Model Choice on Prognostics Performance

The success of model-based approaches to systems health management depends largely on the quality of the underly- ing models. In model-based prognostics, it is especially the quality of the damage progression models, i.e., the models describing how damage evolves as the system operates, that determines the accuracy and precision of remaining useful life predictions. Several common forms of these models are gen- erally assumed in the literature, but are often not supported by physical evidence or physics-based analysis. In this paper, using a centrifugal pump as a case study, we develop differ- ent damage progression models. In simulation, we investigate how model changes influence prognostics performance. Re- sults demonstrate that, in some cases, simple damage progres- sion models are sufficient. But, in general, the results show a clear need for damage progression models that are accurate over long time horizons under varied loading conditions.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
Fast and Flexible Multivariate Time Series Subsequence Search

Multivariate Time-Series (MTS) are ubiquitous, and are generated in areas as disparate as sensor recordings in aerospace systems, music and video streams, medical monitoring, and financial systems. Domain experts are often interested in searching for interesting multivariate patterns from these MTS databases which can contain up to several gigabytes of data. Surprisingly, research on MTS search is very limited. Most existing work only supports queries with the same length of data, or queries on a fixed set of variables. In this paper, we propose an efficient and flexible subsequence search framework for massive MTS databases, that, for the first time, enables querying on any subset of variables with arbitrary time delays between them. We propose two provably correct algorithms to solve this problem — (1) an R-tree Based Search (RBS) which uses Minimum Bounding Rectangles (MBR) to organize the subsequences, and (2) a List Based Search (LBS) algorithm which uses sorted lists for indexing. We demonstrate the performance of these algorithms using two large MTS databases from the aviation domain, each containing several millions of observations. Both these tests show that our algorithms have very high prune rates (>95%) thus needing actual disk access for only less than 5% of the observations. To the best of our knowledge, this is the first flexible MTS search algorithm capable of subsequence search on any subset of variables. Moreover, MTS subsequence search has never been attempted on datasets of the size we have used in this paper.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
OMPS-N20 L2 NM Aerosol Index swath orbital NRT

The OMPS-N20 L2 NM Aerosol Index swath orbital V2 for Near Real Time. For the standard product see the OMPS_N20_NMUVAI_L2  product in CMR .The aerosol index is derived from normalized radiances using 2 wavelength pairs at 340 and 378.5 nm. Additionally, this data product contains measurements of normalized radiances, reflectivity, cloud fraction, reflectivity, and other ancillary variables.

Tags: aerosols, atmosphere, earth-science
Organization: National Aeronautics and Space Administration
Sentinel-3B OLCI Level-3M Global Mapped Earth-observation Reduced Resolution (ERR) Chlorophyll (CHL) - 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
USGS Global Fiducials

The Global Fiducials Library (GFL) is a long-term archive of images from U.S. National Imagery Systems which represents a long-term periodic record for selected scientifically important sites. The GFL was created to be the collection, archive and data management component of the Global Fiducials Program.

The Global Fiducials Program is a collaborative effort between Federal Civil Agencies, Academia, and the Intelligence Community. The principal goal of the Global Fiducials Program was to build and maintain a long-term record of data to support scientists and policy makers involved in that collaborative effort. At the inception of the Program, it was hoped that at some point - perhaps as much as twenty-five years into the future - the acquired data could be openly released to support future scientists and policy makers as well. Since the 1990s, the Global Fiducials Program has been periodically collecting images of environmentally significant sites around the world.

The GFL, which is the archive that maintains this long-term imagery record, is managed by the U.S. Geological Survey under the National Civil Applications Program, in partnership with the Civil Applications Committee

Tags: earth-science, erosion-sedimentation, geomorphic-landforms-processes, land-surface, land-use-land-cover, landscape, soils, surface-radiative-properties, topography
Organization: National Aeronautics and Space Administration
Gazetteer of Planetary Nomenclature: Jovian System: Amalthea

These images display several of Jupiter's moons approved by the International Astronomical Union (IAU).

Tags: amalthea, callisto, europa, ganymede, imagery, images, io, jovian, jupiter, moons, thebe, usgs, working-group-for-planetary-system-nomenclature
Organization: National Aeronautics and Space Administration
TROPICS06 L1A Orbital Geolocated Native-Resolution Antenna Temperatures V1.0

The "Time-Resolved Observations of Precipitation structure and storm Intensity with a Constellation of Smallsats" (TROPICS) mission has a goal of providing nearly all-weather observations of three-dimensional temperature and humidity, as well as cloud ice and precipitation horizontal structure, at high temporal resolution to conduct high-value science investigations of tropical cyclones.  The mission comprises a constellation of six identical Space Vehicles (SVs) conforming to the 3U form factor and hosting a passive microwave spectrometer payload.  This dataset is produced from the Pathfinder satellite, a single 3U small satellite, which has launched previous to the constellation, on a sun-synchronous orbital plane.

Each SV hosts an identical high-performance spectrometer named the TROPICS Millimeter-wave Sounder (TMS) that will provide temperature profiles using seven channels near the 118.75-GHz oxygen absorption line, water vapor profiles using three channels near the 183-GHz water vapor absorption line, imagery in a single channel near 90 GHz for precipitation measurements (when combined with higher resolution water vapor channels), and a single channel near 205 GHz that is more sensitive to cloud-sized ice particles.

Each TROPICS netCDF file contains a granule of data with 81 spots and approximately 2880 scans, where a granule is defined as an orbit's worth of data.

Tags: earth-science, microwave, spectral-engineering
Organization: National Aeronautics and Space Administration
NASA 3D Models: Kepler Photometer

The Kepler Mission is specifically designed to survey a portion of our region of the Milky Way galaxy to discover Earth-sized planets in or near the habitable zones of their stars and determine how many of the billions of stars in our galaxy have such planets. Kepler was launched in March 2009. This package includes models of Kepler, the photometer, and the solar array. By Ball Aerospace.

Tags: 3d-model, kepler, satellite, spacecraft
Organization: National Aeronautics and Space Administration
OCO-3 Level 2 meteorological parameters interpolated from global assimilation model for each sounding, Forward Processing V11 (OCO3_L2_Met) at GES DISC

Version 11 is the current version of the data set. Older versions will no longer be available and are superseded by Version 11.

The Orbiting Carbon Observatory -3 (OCO-3) was deployed to the International Space Station in May, 2019. It is technically a single instrument, almost identical to OCO-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.

OCO-3 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. The three spectrometers have different characteristics and are calibrated independently. 

Oxygen-A Band cloud screening algorithm is one of the primary cloud screening tools implemented in the operational OCO processing pipeline. The algorithm was introduced and applied to early GOSAT data  with further analysis performed on OCO-2 simulations.

The OCO ABO2 algorithm employs a fast Bayesian retrieval to estimate surface pressure and surface albedo from high resolution spectra of the molecular oxygen (O2) A-band, near 0.765 µm. The radiative transfer forward model (FM) assumes a clear-sky condition, i.e. Rayleigh scattering only, such that differences between the modeled and measured radiances are apparent when the measurement scene contains cloud or aerosol.

Tags: atmosphere, atmospheric-chemistry, earth-science
Organization: National Aeronautics and Space Administration
Shuttle Radar Topography Mission DTED Level 1 (3-arc second) Data (DTED-1)

The Shuttle Radar Topography Mission (SRTM) successfully collected Interferometric Synthetic Aperture Radar (IFSAR) data over 80 percent of the landmass of the Earth between 60 degrees North and 56 degrees South latitudes in February 2000. The mission was co-sponsored by the National Aeronautics and Space Administration (NASA) and National Geospatial-Intelligence Agency (NGA). NASA's Jet Propulsion Laboratory (JPL) performed preliminary processing of SRTM data and forwarded partially finished data directly to NGA for finishing by NGA's contractors and subsequent monthly deliveries to the NGA Digital Products Data Wharehouse (DPDW). All the data products delivered by the contractors conform to the NGA SRTM products and the NGA Digital Terrain Elevation Data (DTED) to the Earth Resources Observation & Science (EROS) Center. The DPDW ingests the SRTM data products, checks them for formatting errors, loads the SRTM DTED into the NGA data distribution system, and ships the public domain SRTM DTED to the U.S. Geological Survey (USGS) Earth Resources Observation & Science (EROS) Center.   

Two resolutions of finished grade SRTM data are available through EarthExplorer from the collection held in the USGS EROS archive:

1 arc-second (approximately 30-meter) high resolution elevation data are only available for the United States.

3 arc-second (approximately 90-meter) medium resolution elevation data are available for global coverage. The 3 arc-second data were resampled using cubic convolution interpolation for regions between 60° north and 56° south latitude.

[Summary provided by the USGS.]

Tags: earth-science, land-surface, radar, spectral-engineering, topography
Organization: National Aeronautics and Space Administration
Aquarius L3 Gridded 1-Degree Seasonal Soil Moisture Climatology V005

This data set contains Level-3 gridded seasonal global soil moisture climatology estimates derived from the NASA Aquarius passive microwave radiometer on the Sat&eacute;lite de Aplicaciones Cient&iacute;ficas (SAC-D).

Tags: earth-science, land-surface, soils
Organization: National Aeronautics and Space Administration
HERITAGE SMC PACS 160 micron Catalog

The HERschel Inventory of The Agents of Galaxy Evolution (HERITAGE) open time key program mapped the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) at 100, 160, 250, 350, and 500 microns using Herschel's PACS and SPIRE instruments. The overriding science goal of HERITAGE is to study the life cycle of matter as traced by dust in the LMC and SMC.

Tags: __
Organization: National Aeronautics and Space Administration
Distributed Anomaly Detection using 1-class SVM for Vertically Partitioned Data

There has been a tremendous increase in the volume of sensor data collected over the last decade
for different monitoring tasks. For example, petabytes of earth science data are collected from modern
satellites, in-situ sensors and different climate models. Similarly, huge amount of flight operational data
is downloaded for different commercial airlines. These different types of datasets need to be analyzed
for finding outliers. Information extraction from such rich data sources using advanced data mining
methodologies is a challenging task not only due to the massive volume of data, but also because these
datasets are physically stored at different geographical locations with only a subset of features available
at any location. Moving these petabytes of data to a single location may waste a lot of bandwidth.
To solve this problem, in this paper, we present a novel algorithm which can identify outliers in the
entire data without moving all the data to a single location. The method we propose only centralizes
a very small sample from the different data subsets at different locations. We analytically prove and
experimentally verify that the algorithm offers high accuracy compared to complete centralization with
only a fraction of the communication cost. We show that our algorithm is highly relevant to both earth
sciences and aeronautics by describing applications in these domains. The performance of the algorithm
is demonstrated on two large publicly available datasets: (1) the NASA MODIS satellite images and (2) a
simulated aviation dataset generated by the ‘Commercial Modular Aero-Propulsion System Simulation’ (CMAPSS).

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER COMET ESCORT1 OSIWAC 3 RDR MTP 010 V1.0

This data set contains calibrated images acquired by the OSIRIS Wide Angle
Camera during the escort phase of the Rosetta mission at the comet 67P,
covering the period from 2014-11-21 to 2014-12-19.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
Catalog of Galactic OB Stars

An all-sky catalog of Galactic OB stars has been created by extending the Case-Hamburg Galactic Plane Luminous Stars surveys to include 5,500 additional objects drawn from the literature. This work brings the total number of known or reasonably suspected OB stars to over 16,000. This catalog contains UBV photometry and MK spectral type classifications for these objects as well as radial velocities. This project originated in the summer of 1991 when the author began compiling a cross-reference catalog and tabulation of published UBVbeta photometry for stars listed in Stephenson and Sanduleak&#39;s Luminous Stars (LS) in the Southern Milky Way Catalog (&lt;a href="https://cdsarc.cds.unistra.fr/ftp/cats/III/43"&gt;CDS Cat. III/43&lt;/a&gt;). This database was published in July 1993 (Reed 1993, ApJS, 87, 367) and was subsequently expanded to include compilations of published MK classifications (Reed &amp; Beatty 1995, ApJS, 97, 189), 4-color photometry (Read 1996, A&amp;AS, 117, 313), and radial velocities (Reed &amp; Kuhna 1997, AJ, 113, 823) for these objects. In mid-1997 the project was again expanded to include UBVbeta photometry for stars listed in the Northern-hemisphere volumes of the &quot;Case-Hamburg&quot; (&lt;a href="https://cdsarc.cds.unistra.fr/ftp/cats/III/76"&gt;CDS Cat. III/76&lt;/a&gt;) surveys (Reed 1998, ApJS, 115, 271); MK classifications for the Northern stars were similarly compiled and made electronically available to interested parties, though they were not formally published. Most of the LS objects are OB stars, but there are as well a number of A, F, and G supergiants and a few white dwarfs and Wolf Rayet stars. These surveys reached a limiting photographic magnitude of ~13.5, and were based on objective-prism surveys of dispersion 580 Angstrom/mm at H-gamma. OB stars is here taken to mean main-sequence stars down to temperature class B2 and more luminous ones down to temperature class B9. The original Case-Hamburg surveys (about 12,000 stars) also include some 2,000 evolved A-G stars, along with some white dwarfs, planetary nebulae, and Wolf-Rayet stars. It is worth noting that the definition of an OB star is not universal; for example, Vanbeveren et al. (1998, in &quot;The Brightest Stars&quot;) define them as O-B2 V-IV, O-B3 III, O-B4 II, and all OBA Ib, Iab, Ia, and IaO stars. This table was created by the HEASARC in September 2017 based on the &lt;a href="https://cdsarc.cds.unistra.fr/ftp/cats/V/125"&gt;CDS Catalog V/125&lt;/a&gt; files obcat.dat, obmk.dat, obubvbet.dat and radvel.dat. This is a service provided by NASA HEASARC .

Tags: __
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P RSI 1/2/3 COMET ESCORT 3 1078 V1.0

This is a Rosetta Radio Science data set, collected during the COMET ESCORT 3 phase 2015-07-01 to 2015-10-21. It is a Global Gravity measurement at the comet 67P and covers the time 2015-10-04T20:53:10.000 to 2015-10-05T05:22:30.000.

Tags: __
Organization: National Aeronautics and Space Administration