The Marine Minerals Geochemical Database was created by NGDC as a part of a project to construct a comprehensive computerized bibliography and geochemical database as a Cooperative effort with the Ocean Minerals and Energy Division of the National Ocean Service of NOAA, and the Office of Marine Minerals and International Activities (INTERMAR) of the Minerals Management Service. The marine minerals project was begun in April of 1983, and ended in 1991. Active compilation of the bibliography ended at NGDC in the fall of 1991. Coding of geochemical analyses at NGDC ended in 1989. The marine minerals database contains geochemical analyses and auxiliary information on present-day marine deposits of primarily ferromanganese nodules and crusts, but also contains some data for heavy minerals, and phosphorites. The NOAA & MMS Marine Minerals CDROM data set, funded by INTERMAR, containing the marine minerals geochemical database and bibliography with access software for PC and Macintosh platforms was released by NGDC in October of 1991. Sources of data include the historic Scripps Institution of Oceanography (SIO) manganese nodule analysis file, the CNEXO ferromanganese nodule analysis file, ferromanganese crust data compiled by the U.S. Geological Survey, and data coded at NGDC from the scientific literature. A placer data set from the USGS is also included. The ferromanganese nodule/crust portion of the database contains over 140,000 element/oxide analyses. Approximately 1,400 heavy mineral analyses and fewer than 300 phosphorite analyses are in the database. The geochemical database is described online through the NGDC server.The geochemical database has been corrected and updated by the International Seabed Authority, sponsored by the United Nations - their geochemical database supersedes the NGDC database.

This dataset contains Meteorological Measurement System (MMS) data collected on the NASA DC-8 aircraft from the High Ice Water Content (HIWC) Radar Study project that took place in Fort Lauderdale, Florida; Palmdale, California; and Kona, Hawaii. The data files are in ICARTT format.

The Alpha Jet Atmospheric eXperiment (AJAX) is a partnership between NASA's Ames Research Center and H211, L.L.C., facilitating routine in-situ measurements over California, Nevada, and the coastal Pacific in support of satellite validation. The standard payload complement includes rigorously-calibrated ozone (O3), formaldehyde (HCHO), carbon dioxide (CO2), and methane (CH4) mixing ratios, as well as meteorological data including 3-D winds. Multiple vertical profiles (to ~8.5 km) can be accomplished in each 2-hr flight. The AJAX project has been collecting trace gas data on a regular basis in all seasons for over a decade, helping to assess satellite sensors' health and calibration over significant portions of their lifetimes, and complementing surface and tower-based observations collected elsewhere in the region.AJAX supports NASA's Orbiting Carbon Observatory (OCO-2/3) and Japan's Greenhouse Gases Observing Satellite (GOSAT) and GOSAT-2, and collaborates with many other research organizations (e.g. California Air Resources Board (CARB), NOAA, United States Forest Service (USFS), Environmental Protection Agency (EPA)). AJAX celebrated its 200th science flight in 2016, and previous studies have investigated topics as varied as stratospheric-to-tropospheric transport, forest fire plumes, atmospheric river events, long-range transport of pollution from Asia to the western US, urban outflow, and emissions from gas leaks, oil fields, and dairies.

This data set contains NASA DC-8 Meteorological Measurement System (MMS) Data collected during the Deep Convective Clouds and Chemistry Experiment (DC3) from 4 May 2012 through 22 June 2012. This data set is in ICARTT format. Please see the header portion of the data files for details on instruments, parameters, quality assurance, quality control, contact information, and data set comments.

We use a machine learning approach to automatically identify shock crossings from the Magnetospheric Multiscale (MMS) spacecraft. We compile a database of 2797 crossings including various spacecraft related and shock related parameters for each event. Furthermore, for each event we provide an overview plot containing key parameters of the shock crossing.

A Technical report detailing the content of the database can be found at the DOI: http://dx.doi.org/10.1029/2022JA030454

Dataset of magnetopause (MP) current sheet crossings identified by the Paschmann et al. 2018 MMS magnetopause database. This data covers 561 MP crossings from 4 years of MMS transits from 2015 to 2018 across the dayside and flank magnetopause. These 561 crossings include only monotonic, complete magnetopause crossings or clear Harris sheet like events. We also only considered events that had a significant peak in their current densities. Where “significant" in our case was considered to be a current crossing where at least 50% of the crossing duration was within 15% of the maximum current peak during that crossing. This condition enabled us to select events with a strong current and high signal-to-noise ratios. The magnetopause crossing times were taken from the MMS magnetopause crossing database created by Goetz Paschmann and Stein Haaland, and further developed by the International Space Science Institute Team 442, “Study of the physical processes in magnetopause and magnetosheath current sheets using a large MMS database” as analyzed in the paper Paschmann et al. 2018. Specifically, this data includes the Paschmann et al. 2018's MP crossing ID number identifying the specific event in their database and the start and end times of each crossing as identified by the database's automated minimum variance analysis of the magnetic field in boundary normal or LMN coordinates (Paschmann et al., 2018). The start time indicates when the MP current sheet for that specific MMS crossing began and the end time indicates when the current sheet ended. Additionally, the two datasets include averaged ion and electron data over each respective MP crossings, whose entries are described below:

Ion Dataset Identifiers: (Note, MPC stands for "magnetopause crossing") "#" - dataset entry number; "MPC ID" - Paschmann et al. 2018's MP crossing ID number; "MPC Start" - MPC start date (zulu time); "MPC End" - MPC end date (zulu time); "MPC Duration (s)" - MPC duration in seconds; "MPC V_normal (km/s)" - MP current sheet's boundary normal velocity in km/s (taken from Paschmann et al. 2018's database); "MPC Loc X_GSE (RE)" - X location of MPC in GSE coordinates in units of Re; "MPC Loc Y_GSE (RE)" - Y location of MPC in GSE coordinates in units of Re; "MPC Loc Z_GSE (RE)" - Z location of MPC in GSE coordinates in units of Re; "MPC Loc 𝜃 (º)" - 𝜃 location of MPC in our spherical GSE coordinates in degrees; "MPC Loc ɸ (º)" - ɸ location of MPC in our spherical GSE coordinates in degrees; "MPC Length (km)" - Length of MPC in units of km; "MPC Length (di)" - Length of MPC in units of di; "MPC Length (rgi)" - Length of MPC in units of rig; "di (km)","rgi (km)" - Ion inertial length and ion gyroradius in units of km; "Jr_curl" , "Jp_curl" , "Jt_curl" - R, ɸ, 𝜃 components of the curlometer current using our spherical GSE coordinates; "Jr_totali" , "Jp_totali" , "Jt_totali" - R, ɸ, 𝜃 components of the total ion diamagnetic current; "Jr_gradNi" , "Jp_gradNi" , "Jt_gradNi" - R, ɸ, 𝜃 components of the ion density gradient component of the total ion diamagnetic current; "Jr_divTi" , "Jp_divTi" , "Jt_divTi" - R, ɸ, 𝜃 components of the ion temperature divergence component of the total ion diamagnetic current; "Ti_para (eV)" - Parallel ion temperature in eV; "Ti_perp (eV)" - Perpendicular ion temperature in eV; "Ni (cm^-3)" - Ion density in cm^-3; "Bx (nT)" , "By (nT)" , "Bz (nT)" - X, Y, Z GSE components of the magnetic field in nT;

Electron Dataset Identifiers: (Note, MPC stands for "magnetopause crossing") "#" - dataset entry number; "MPC ID" - Paschmann et al. 2018's MP crossing ID number; "MPC Start" - MPC start date (zulu time); "MPC End" - MPC end date (zulu time); "de (km)","rge (km)" - Electron inertial length and electron gyroradius in units of km; "Jr_totale" , "Jp_totale" , "Jt_totale" - R, ɸ, 𝜃 components of the total electron diamagnetic current; "Jr_gradNe" , "Jp_gradNe" , "Jt_gradNe" - R, ɸ, 𝜃 components of the electron density gradient component of the total electron diamagnetic current; "Jr_divTe" , "Jp_divTe" , "Jt_divTe" - R, ɸ, 𝜃 components of the electron temperature divergence component of the total electron diamagnetic current; "Te_para (eV)" - Parallel electron temperature in eV; "Te_perp (eV)" - Perpendicular electron temperature in eV; "Ne (cm^-3)" - Electron density in cm^-3;

No description is available. Visit https://dataone.org/datasets/46516b83f62a80c8e38bf01ae90f5bf7 for complete metadata about this dataset.

The Minerals Management Service (MMS), Gulf of Mexico Outer Continental Shelf (OCS) Region, announces the availability of all releasable digital well log curves stored in the MMS database. Well logs collected under 30 CFR 250.66 were required to be submitted in digital format for all wells spudded on or after December 1, 1995. Releasability of this geoscientific data is in accordance with the Code of Federal Regulations. Digital well log curves are a new and valuable data format to be used with the latest technology for the exploration and development of hydrocarbons on the Federal Outer Continental Shelf. When incorporated into other databases that use the latest technology, this information provides the geoscientist with a visual representation of hydrocarbon reservoirs, thereby increasing accuracy of interpretation and permitting greater confidence in the resulting drilling recommendations.

The Fast Plasma Instrument (FPI) usually Operates in Fast Survey (FS) Mode in the MMS Region Of Interest (ROI) for the current Mission Phase. Data are taken at Burst (30/150 ms for DES/DIS) Resolution in this Mode. Data are also made available at Survey (4.5 s, etc.) Resolution. Per Mission Design, not all Burst Resolution Data are downlinked, but all Survey Data are downlinked. Planning around Calibration Activities, avoidance of Earth Radiation Belts, etc., when possible, FPI usually Operates in Slow Survey (SS) Mode outside of ROI, and then only the 60 s Resolution Survey Data are available. This Product contains Results from integrating the standard Moments of Phase Space Distributions formed from the indicated Data Type (DES/DIS Burst, FS or SS). For Convenience, some additional Parameters are included to augment those most commonly found in a Moments Product of this sort, plus Time Stamps and other Annotation characterizing the State of the Instrument System at the indicated Time.

Dataset

This dataset was created by Matteo Marengo

Released under Apache 2.0

Contents

Search Coil Magnetometer (SCM) AC Magnetic Field (32 samples/s), Level 2, Survey Mode Data. The tri-axial Search-Coil Magnetometer with its associated preamplifier measures three-dimensional magnetic field fluctuations. The analog magnetic waveforms measured by the SCM are digitized and processed inside the Digital Signal Processor (DSP), collected and stored by the Central Instrument Data Processor (CIDP) via the Fields Central Electronics Box (CEB). Prior to launch, all SCM Flight models were calibrated by LPP team members at the National Magnetic Observatory, Chambon-la-Foret (Orleans). Once per orbit, each SCM transfer function is checked thanks to the onboard calibration signal provided by the DSP. The SCM is operated for the entire MMS orbit in survey mode. Within scientific Regions Of Interest (ROI), burst mode data are also acquired as well as high speed burst mode data. This SCM data set corresponds to the AC magnetic field waveforms in nanoTesla and in the GSE frame. The SCM instrument paper can be found at http://link.springer.com/article/10.1007/s11214-014-0096-9 and the SCM data product guide at https://lasp.colorado.edu/mms/sdc/public/datasets/fields/.

FPI usually operates in Fast Survey (FS) Mode in the MMS Region Of Interest (ROI) for the current Mission Phase. Data are taken at Burst (30/150 ms for DES/DIS) Resolution in this Mode. Data are also made available at Survey (4.5 s, etc.) Resolution. Per Mission Design, not all Burst Resolution Data are downlinked, but all Survey Data are downlinked. Planning around Calibration Activities, avoidance of Earth Radiation Belts, etc., when possible, FPI usually operates in Slow Survey (SS) Mode (60 s Resolution) outside of ROI, and then only the 60 s Resolution Survey Data are available. This Product contains Partial Moments that come from performing the Standard Moment Integrals over a limited Portion of Velocity Space. The resulting Quantities are named similarly to their corresponding Standard Moments, but are decorated with 'part' to differentiate. For example, density_part is the Density Moment integrated from a particular Energy Step to Infinity. These Partial Moments are formed from the indicated Data Type (DES/DIS Burst, FS or SS). For convenience, some additional Parameters are included to augment those most commonly found in a Moments Product of this sort, plus Time Stamps and other Annotation characterizing the State of the Instrument System at the indicated Time.

This is a database of density and temperature moments derived from Magnetospheric Multiscale (MMS-1) Hot Plasma Analyzer (HPCA) ion phase space density distributions. Proton velocity components $(V_X, V_Y, V_Z)$ were also computed in the geocentric solar magnetospheric (GSM) coordinate system, and changed to the plasma frame of reference by subtraction of the MMS-1 spacecraft velocity. The database of 39,018 MMS-1 data points spans 11 October 2016 to 29 December 2021 (5.2 years, discontinuous coverage). The event selection criteria yielded spatial coverage spanning $R=5$--$15\,R_E$ and 08--21~MLT. Moments were numerically computed for three species: H+, He+, and O+. Numerical integration included energies $\le$100~eV, by including the lowest 27 HPCA energy steps ($1.4$~eV to 98.4~eV). To correct for spacecraft charging effects, moments were computed using ion distributions that are shifted in energy by the point-to-point spacecraft potential. The HPCA cadence is $\sim$$10$~s for most (85.1\%) of the database, except for selection-related time gaps: [7.6\%, 2.6\%, 4.7\%] of points have a data gap equal to [1, 2, 3 or more] HPCA timesteps. The event selection for the database was provided by M. J. Kim. The computation of the moments was performed by J. Mukherjee using software and analysis tools with contributions by C. A. Gonzalez and R. Gomez.

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The Fluxgate Magnetometers (FGM) on Magnetospheric Multiscale consist of a traditional Analog Fluxgate Magnetometer (AFG) and a Digital Fluxgate magnetometer (DFG). The dual magnetometers are operated as a single instrument providing a single intercalibrated data product. Range changes occur at different times on the two instruments so the gains checked each periapsis can be carried out unambiguously to apoapsis. Cross correlation of calibration parameters can separate causes of the any apparent calibration changes. Use of Electron Drift Instrument (EDI) to determine the field along the rotation axis allows accurate monitoring of the zero levels along the rotation axis. Prior to launch the magnetometers were calibrated at the Technical University, Braunschweig, except for the AFG magnetometers on MMS3 and MMS4, which were calibrated at UCLA. Both sets of sensors are operated for the entire MMS orbit, with slow survey (8 samples per second) outside of the Region of Interest (ROI), and fast survey (16 samples per second) inside the ROI. Within the ROI, burst mode data (128 samples per second) are also acquired. A detailed description of the MMS fluxgate magnetometers, including science objectives, instrument description, calibration, magnetic cleanliness program, and data flow can be found at http://link.springer.com/article/10.1007%2Fs11214-014-0057-3 (DOI 10.1007/s11214-014-0057-3). Additional information can also be found at http://www-spc.igpp.ucla.edu/ssc/mms (UCLA), and http://www.iwf.oeaw.ac.at/de/forschung/erdnaher-weltraum/mms/dfg (IWF, Graz). For the purpose of creating a unified FGM Level 2 data product, burst mode data is taken from DFG and survey mode data is taken from AFG. Because AFG and DFG are cross-calibrated on an orbit-averaged basis, small differences in offset may be observed between Level 2 burst and survey mode data. Consequently, any differences are within the error of the measurement. Based on preliminary analysis of the data, the absolute error within the Region of Interest (ROI) is estimated to be no more than 0.1 nT in the spin-plane, 0.15 nT along the spin-axis and 0.2 nT in total magnitude.

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The Fast Plasma Instrument (FPI) usually Operates in Fast Survey (FS) Mode in the MMS Region Of Interest (ROI) for the current Mission Phase. Data are taken at Burst (30/150 ms for DES/DIS) Resolution are aggregated onboard and made available at Survey (4.5 s) Resolution in this Mode. Planning around Calibration Activities, avoidance of Earth Radiation Belts, etc., when possible, FPI usually Operates in Slow Survey (SS) Mode outside of ROI, and then only the 60 s Resolution Survey Data are available. This Product contains Results from integrating the standard Moments of Phase Space Distributions formed from the indicated Data Type (DES/DIS Burst, FS or SS). For Convenience, some additional Parameters are included to augment those most commonly found in a Moments Product of this sort, plus Time Stamps and other Annotation characterizing the State of the Instrument System at the indicated Time.

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Electric Double Probe, Quick-Look Three-Dimensional Electric Field, Level 2, Fast Survey Data

Non-traditional data signals from social media and employment platforms for MMS stock analysis