AndreaBozzo/ceres-open-data-index huggingface dataset:
Sentinel-3A OLCI Level-3B Global Binned 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
ICESat-2 Derived 30 m Along-Track Boreal Aboveground Biomass Density V001

This data set provides a quality-filtered set of ATLAS/ICESat-2 L3A Land and Vegetation Height, Version 5 (ATL08) observations of relative canopy heights and aboveground biomass density model results for circumpolar boreal forests. The data were collected at 30 m along-track segment lengths for strong beams only during the 2019–2021 high northern latitude growing seasons. The ATL08 point observations were clipped to the extent of the boreal forest spatial domain.

Tags: biosphere, earth-science, vegetation
Organization: National Aeronautics and Space Administration
SWOT Level 2 Nadir Altimeter Interim Geophysical Data Record with Waveforms - SGDR Version 1.0

Same as L2_NALT_GDR, using preliminary values for some auxiliary data. Uses Medium-accuracy (preliminary) Orbit Ephemeris (MOE). Available with latency of < 1.5 days. Discrete measurements at nadir for each half orbit, along the ground track. Available in netCDF-4 file format.

Tags: earth-science, ocean-waves, oceans, sea-surface-topography
Organization: National Aeronautics and Space Administration
OMPS-N21 L2 NM Aerosol Index swath orbital NRT

The OMPS-N21 L2 NM Aerosol Index swath orbital V2 for Near Real Time. For the standard product see the OMPS_N21_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
Soil Moisture Active Passive (SMAP) L1-L3 Ancillary Satellite Data V001

This ancillary SMAP product contains two dynamic data sets describing 1) the attitude and 2) the trajectory of the SMAP satellite. The data files are generated using quaternions from the SMAP spacecraft and inputs from earth receiving stations, respectively.

Tags: earth-science, platform-characteristics, spectral-engineering
Organization: National Aeronautics and Space Administration
Subnanosecond scintillation detector for high energy cosmic rays Project

&lt;p&gt;The task objective is to develop a gamma ray scintillator technology with subnanosecond temporal resolution and the capability to withstand unprecedented rates and doses of high energy gamma radiation. This is a joint project with Caltech Prof. Dave Hitlin to detect BaF2 fast scintillation (&amp;tau;&amp;nbsp;~&amp;nbsp;0.9ns at &amp;lambda;&amp;nbsp;~&amp;nbsp;220nm) while rejecting slow scintillation (&amp;tau;&amp;nbsp;~&amp;nbsp;650ns at &amp;lambda;&amp;nbsp;~&amp;nbsp;330nm). We will also develop solar blind coatings using ALD technology for DUV bandpass filter.&lt;/p&gt;

Tags: active, jet-propulsion-laboratory, project
Organization: National Aeronautics and Space Administration
Cosmic Dust Catalog

Since May 1981, the National Aeronautics and Space Administration (NASA) has used aircraft to collect cosmic dust (CD) particles from Earth's stratosphere. Specially designed dust collectors are prepared for flight and processed after flight in an ultraclean (Class-100) laboratory constructed for this purpose at the Lyndon B. Johnson Space Center (JSC) in Houston, Texas. Particles are individually retrieved from the collectors, examined and cataloged, and then made available to the scientific community for research. Cosmic dust thereby joins lunar samples and meteorites as an additional source of extraterrestrial materials for scientific study.

Tags: planetary-science, space-science
Organization: National Aeronautics and Space Administration
IceBridge LVIS L1A Geotagged Images V001

This data set contains geotagged images taken over Greenland by the NASA Digital Mapping Camera paired with the Land, Vegetation, and Ice Sensor (LVIS), an airborne lidar scanning laser altimeter. The data were collected as part of Operation IceBridge funded campaigns.

Tags: earth-science, spectral-engineering, visible-wavelengths
Organization: National Aeronautics and Space Administration
Pulsar Ephemerides for Timing LAT Pulsars

Timing pulsars with the LAT requires the use of an ephemeris that covers the time period being analyzed. Below are several resources to provide this useful input to your analysis.

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
HEASARC SAOImage DS9

SAOImage DS9 is an astronomical imaging and data visualization application. DS9 supports FITS images and binary tables, multiple frame buffers, region manipulation, and many scale algorithms and colormaps. It provides for easy communication with external analysis tasks and is highly configurable and extensible via XPA and SAMP.

Tags: astronomy, data-visualization, goddard-space-flight-center, gsfc, hearsarc, smithsonian-astrophysical-observatory, star-catalog, thermodynamics
Organization: National Aeronautics and Space Administration
High Mountain Asia 1 km 6-hourly Downscaled Meteorological Data 2003 to 2018 V001

This data set provides downscaled six-hourly atmospheric forcings from European Centre for Medium-Range Weather Forecasts (ECMWF) and Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS) precipitation from 2003 to 2019 at a spatial resolution of ~1km across High Mountain Asia.

Tags: atmosphere, atmospheric-pressure, atmospheric-radiation, atmospheric-temperature, atmospheric-water-vapor, atmospheric-winds, earth-science, precipitation
Organization: National Aeronautics and Space Administration
SWOT Level 1B Low-Rate Interferogram Data Product, Version 2.0

Interferograms for each of the 9 Doppler beams formed and spatially averaged (low rate) by the On Board Processor, corrected on the ground for phase biases (inherent to the processing applied on board). The geometry of the measurements is also reported for use in subsequent processing. Gridded; full swath for each half orbit. Available in netCDF-4 file format.

Tags: earth-science, radar, sensor-characteristics, spectral-engineering
Organization: National Aeronautics and Space Administration
Global Navigation Satellite System (GNSS) Final Orbit Product from NASA CDDIS

Precise satellite orbits derived from analysis of Global Navigation Satellite System (GNSS) data. Analysis Centers (ACs) of the International GNSS Service (IGS) retrieve GNSS data on regular schedules to produce precise orbits identifying the position and velocity of the GNSS satellites. These orbits are determined sub-daily (ultra-rapid generation), daily (rapid generation), and weekly (final IGS product). The IGS Analysis Center Coordinator retrieves these individual solutions and generates the official IGS combined orbit products. The orbits generated by the individual ACs and the combination products generated by the ACCs are available at the CDDIS. These orbits can be used to determine precise coordinates of the observing stations, gravity field parameters, and Earth orientation parameters. The IGS Final products are the basis for the IGS reference frame and are intended for those applications demanding high consistency and quality.

Tags: nasa
Organization: National Aeronautics and Space Administration
U.S. Geological Survey Aerial Photography

The U.S. Geological Survey (USGS) Aerial Photography data set includes over 2.5 million film transparencies.  Beginning in 1937, photographs were acquired for mapping purposes at different altitudes using various focal lengths and film types.  The resultant black-and-white photographs contain less than 5 percent cloud cover and were acquired under rigid quality control and project specifications (e.g., stereo coverage, continuous area coverage of map or administrative units).  Prior to the initiation of the National High Altitude Photography (NHAP) program in 1980, the USGS photography collection was one of the major sources of aerial photographs used for mapping the United States.  Since 1980, the USGS has acquired photographs over project areas that require photographs at a larger scale than the photographs in the NHAP and National Aerial Photography Program collections.

Tags: earth-science, land-surface, surface-radiative-properties, topography
Organization: National Aeronautics and Space Administration
Predicting Battery Life for Electric UAVs

This paper presents a novel battery health management technology for the new generation of electric unmanned aerial vehicles powered by long-life, high-density, scalable power sources. Current reliability based techniques are insufficient to manage the use of such batteries when they are an active power source with frequently varying loads in uncertain environments. The technique presented here encodes the basic electrochemical processes of a Lithium-polymer battery in an advanced Bayesian inference framework to simultaneously track battery state-of-charge as well as tune the battery model to make accurate predictions of remaining useful life. Results from ground tests with emulated flight profiles are presented with discussions on the use of such prognostics results for decision making.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
Fault Adaptive Control of Overactuated Systems Using Prognostic Estimation

Most fault adaptive control research addresses the preservation of system stability or functionality in the presence of a specific failure (fault). This paper examines the fault adaptive control problem for a generic class of incipient failure modes, which do not initially affect system stability, but will eventually cause a catastrophic failure to occur. This risk of catastrophic failure due a component fault mode is some monotonically increasing function of the load on the component. Assuming that a probabilistic prognostic model is available to evaluate the risk of incipient fault modes growing into catastrophic failure conditions, then fundamentally the fault adaptive control problem is to adjust component
loads to minimize risk of failure, while not overly degrading nominal performance. A methodology is proposed for posing this problem as a finite horizon constrained optimization, where constraints correspond to maximum risk of failure and maximum deviation from nominal performance. Development of the methodology to handle a general class of overactuated systems is given. Also, the fault adaptive control methodology is demonstrated on an application example of practical significance, an electro-mechanical actuator (EMA) consisting of three DC motors geared to the same output shaft. Similar actuator systems are commonly used in aerospace, transportation, and industrial processes to actuate critical loads, such as aircraft control surfaces. The fault mode simulated in the system is a temperature dependent motor winding insulation degradation.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
A Structural Model Decomposition Framework for Systems Health Management

Systems health management (SHM) is an impor- tant set of technologies aimed at increasing system safety and reliability by detecting, isolating, and identifying faults; and predicting when the system reaches end of life (EOL), so that appropriate fault mitigation and recovery actions can be taken. Model-based SHM approaches typically make use of global, monolithic system models for online analysis, which results in a loss of scalability and efficiency for large-scale systems. Improvement in scalability and efficiency can be achieved by decomposing the system model into smaller local submodels and operating on these submodels instead. In this paper, the global system model is analyzed offline and structurally decomposed into local submodels. We define a common model decomposition framework for extracting submodels from the global model. This framework is then used to develop algorithms for solving model decomposition problems for the design of three separate SHM technologies, namely, estimation (which is useful for fault detection and identification), fault isolation, and EOL predic- tion. We solve these model decomposition problems using a three-tank system as a case study.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
Knowledge Management for Large Scale Condition Based Maintenance

This presentation will review the use of knowledge management in the development and support of Condition Based Maintenance (CBM) systems for complex systems with particular emphasis on the experience of the development of the Fault Model for large commercial  aircraft.  The presentation is divided into four sections:

1.       Review of experience of building fault models and Central Maintenance Computer for large commercial aircraft.
2.       Review of the key functions and usage scenarios for a typical CBM Knowledge Management System
3.       Identification of criteria for evaluation of implementation alternatives

The presentation will conclude with a short discussion of future directions for CBM Knowledge Management Systems.

**Speaker: Tim Felke, Honeywell**

 

Tim Felke joined Honeywell in 1984 as a control systems analyst and was the manager for their Systems Analysis and Engineering Sciences department for several years. He was a principle author of the proposal for the Central Maintenance Computer for the Boeing 777 and then was a leader in its development. Since then he has been an Engineering Fellow for the diagnostic and knowledge management functions of the Aircraft Diagnostic and Maintenance Systems group. In this work he has published several papers and is the principle inventor or significant contributor on nearly a dozen patents. He holds a BS in Electrical Engineering from Arizona State University.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
Advanced W-Band Gallium Nitride Monolithic Microwave Integrated Circuits (MMICs) for Cloud Doppler Radar Supporting ACE Project

&lt;p&gt;
	Develop W-band Gallium Nitride (GaN) MMICs to enable the advanced cross-track scanning, dual-frequency Doppler cloud radar concept in support of the Aerosol-Cloud-Ecosystem (ACE) mission.&lt;br /&gt;
	Targeted GaN MMIC component performance goals are:&lt;br /&gt;
	Power amplifier (PA): 1 Watt with 12 dB gain.&lt;br /&gt;
	Low noise amplifier (LNA): &amp;lt;6 dB noise figure with&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; 17 dB gain.&lt;br /&gt;
	Single pole double throw switch (SPDT): &amp;lt;3 dB insertion loss.&lt;br /&gt;
	Phase shifter: 4 bit resolution and &amp;lt;8 dB insertion loss.&lt;br /&gt;
	Integrated MMIC chip with all transceiver front end functions.&lt;br /&gt;
	&amp;nbsp;&lt;/p&gt;

Tags: active, nasa-headquarters, project
Organization: National Aeronautics and Space Administration
Terra MODIS Level-3 Global Binned 11µm Daytime Sea Surface Temperature (SST) Data, version R2019.0

MODIS (or Moderate-Resolution Imaging Spectroradiometer) is a key instrument aboard the Terra (EOS AM) and Aqua (EOS PM) satellites. Terra's orbit around the Earth is timed so that it passes from north to south across the equator in the morning, while Aqua passes south to north over the equator in the afternoon. Terra MODIS and Aqua MODIS are viewing the entire Earth's surface every 1 to 2 days, acquiring data in 36 spectral bands, or groups of wavelengths (see MODIS Technical Specifications). These data will improve our understanding of global dynamics and processes occurring on the land, in the oceans, and in the lower atmosphere. MODIS is playing a vital role in the development of validated, global, interactive Earth system models able to predict global change accurately enough to assist policy makers in making sound decisions concerning the protection of our environment.

Tags: earth-science, national-geospatial-data-asset, ngda, ocean-temperature, oceans
Organization: National Aeronautics and Space Administration
LAT Second Catalog of Gamma-ray Pulsars

The LAT Second Pulsar Catalog is available as a .tgz (tarred and zipped) archive file. The archive includes a main catalog FITS file with the data from the paper tables, images of the light curve and spectral energy distributions (SEDs) for each pulsar, FITS files containing the data points used in those images, and the timing parameters used in the analysis. A full description of the online archive is given in Appendix B of the preprint. Upon final publication, this catalog will also be generated as a BROWSE table that will be linked to this page.

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
OCO-3 Level 1B calibrated, geolocated calibration spectra, Retrospective Processing V11r (OCO3_L1B_Calibration) at GES DISC

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

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. 

The OCO-3 incorporates three high-resolution spectrometers that make coincident measurements ofreflected 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. Their raw data numbers (DN) are delivered correlated in time to the Level 1B process as Level 1A products. Each band has 1016 spectralelements, although some are masked out in the L2 retrieval.

This L1B product results from calibration mode measurements (e.g., Lunar,Solar, Dark observations), and thus it differs from the OCO3_L1B_Science(L1bSc) product. The differences in the product formats are only in the geolocation information provided. Whereas the L1bSc products report geolocation data for each sounding, calibration products report the directionof the boresight vector.This is the retrospective processing where the calibration data is estimated from the full timeseries of data (before, during, and after the measurements), and is expected to be of slightly higher quality.

This is the retrospective processing where the calibration data is estimated from the full timeseries of data (before, during, and after the measurements), and is expected to be of slightly higher quality.

Tags: atmosphere, atmospheric-chemistry, earth-science, infrared-wavelengths, spectral-engineering
Organization: National Aeronautics and Space Administration
SMMR/Nimbus-7 Color Images V001 (SMMRN7IM) at GES DISC

SMMRN7IM is the Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) Color Image data product scanned from 17" x 15" color prints and saved as JPEG-2000 files. Sea surface temperature, sea surface winds, total atmospheric water vapor over oceans, total atmospheric liquid water over oceans, including brightness temperature parameters are available as both 6-day composites and 1-month averages between 64 south and north latitudes in Mercator projection. Sea ice fraction, sea ice and ocean surface temperature, sea ice concentration, including brightness temperature parameters are available as both 3-day and 1-month averages in north and south polar stereographic projections. Images may contain between one and three measured parameters. These SMMR images are available from 30 October 1978 through 2 November 1983. The principal investigator for the SMMR experiment was Dr. Per Gloersen from NASA GSFC.
 
These products were previously available from the NSSDC under the ids ESAD-00007, ESAD-00056, ESAD-00123, ESAD-00124, ESAD-00162, ESAD-00172, ESAD-00173, ESAD-00176 ESAD-00177, ESAD-00178, and ESAD-00241 (old ids 78-098A-08I-S).

Tags: atmosphere, atmospheric-water-vapor, cryosphere, earth-science, microwave, ocean-temperature, ocean-winds, oceans, sea-ice, spectral-engineering
Organization: National Aeronautics and Space Administration
ADAPTIVE FAULT DETECTION ON LIQUID PROPULSION SYSTEMS WITH VIRTUAL SENSORS: ALGORITHMS AND ARCHITECTURES

Prior to the launch of STS-119 NASA had completed a study of an issue in the flow control valve (FCV) in the Main Propulsion System of the Space Shuttle using an adaptive learning method known as Virtual Sensors.  Virtual Sensors are a class of algorithms that estimate the value of a time series given other potentially nonlinearly correlated sensor readings.  In the case presented here, the Virtual Sensors algorithm is based on an ensemble learning approach and takes sensor readings and control signals as input to estimate the pressure in a subsystem of the Main Propulsion System.  Our results indicate that this method can detect faults in the FCV at the time when they occur.  We use the standard deviation of the predictions of the ensemble as a measure of uncertainty in the estimate.  This uncertainty estimate was crucial to understanding the nature and magnitude of transient characteristics during startup of the engine.   This paper overviews the Virtual Sensors algorithm and discusses results on a comprehensive set of Shuttle missions and also discusses the architecture necessary for deploying such algorithms in a real-time, closed-loop system or a human-in-the-loop monitoring system. These results were presented at a Flight Readiness Review of the Space Shuttle in early 2009.

Tags: ames, dashlink, nasa
Organization: National Aeronautics and Space Administration
Landsat Image Mosaic of Antarctica (LIMA)

A team of scientists from the U.S. Geological Survey, the British Antarctic Survey, and the National Aeronautics and Space Administration, with funding from the National Science Foundation, created LIMA in support of the International Polar Year (IPY; 2007–08).

Tags: earth-science, land-surface, surface-radiative-properties, topography
Organization: National Aeronautics and Space Administration
IceBridge ATM Waveform Derived Snow Effective Grain Radius V001

This data set reports surface grain size estimates of snow and ice using waveform measurements from NASA's Airborne Topographic Mapper (ATM) narrow-swath and wide-swath instrumentation over the Greenland ice sheet and surrounding sea ice.

Tags: cryosphere, earth-science, glaciers-ice-sheets
Organization: National Aeronautics and Space Administration