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18 results for “Neutral Density”
Results of "Storm Time Data Assimilation in the Thermosphere Ionosphere with TIDA" CHAMP, GRACE-A, and GRACE-B neutral density data assimilation into CTIPe for 2003 Halloween Storms
<p># README</p> <p>Results for the article "Storm Time Neutral Density Assimilation in the Thermosphere Ionosphere with<br> TIDA".</p> <p>There are three storms presented here:</p> <p>1. 2003 storm: October 26-30, 2003<br> 2. 2004 storm: July 26-30, 2004<br> 3. 2002 storm: September 27 - October 2, 2002.</p> <p>For each of these three storms, there are four runs. For each storm, we've done a run<br> assimilating all satellites, and then three more assimilating each satellite individually and<br> comparing against the others.</p> <p>Each directory name before underscore identifies the date the run was<br> started. After the underscore identifies the date assimilated.</p> <p>This readme uses the notation that in curly brackets the satellites assimilated are given.</p> <p>- a stands for GRACE-A<br> - b stands for GRACE-B<br> - c stands for CHAMP</p> <p>The runs are summarized below:</p> <p>1. 2003 storm: {a, b, c}: 2021-12-29T1259_...<br> 3. 2003 storm: {a}: 2022-01-01T1654_...<br> 4. 2003 storm: {b}: 2022-01-02T1423_...<br> 2. 2003 storm: {c}: 2021-12-29T2342_...</p> <p>5. 2004 storm: {a, b, c}: 2022-01-03T1614_...<br> 6. 2004 storm: {a}: 2022-01-04T1027_...<br> 7. 2004 storm: {b}: 2022-01-04T2144_...<br> 8. 2004 storm: {c}: 2022-01-05T0502_...</p> <p>9. 2002 storm: {a, b, c}: 2022-01-02T2025_...<br> 10. 2002 storm: {a}: 2022-01-05T1056_...<br> 11. 2002 storm: {b}: 2022-01-05T1854_...<br> 12. 2002 storm: {c}: 2022-01-06T1017_...</p> <p>## Example result directory</p> <p>2021-12-29T1259_d2003-10-27<br> ├── density_champ_density.csv<br> ├── density_grace-a_density.csv<br> ├── density_grace-b_density.csv<br> └── inputs<br> ├── reference_2003-10-27_input.txt<br> └── special_2003-10-27_input.txt<br> <br> 1 directory, 5 files</p> <p>## Zenodo doesn't support directories</p> <p>So, the file structure has been flattened in the following way:</p> <p>Before: ./aaa/bbb/ccc.png</p> <p>After: ./aaa-bbb-ccc.png</p> <p>https://unix.stackexchange.com/~/45659</p> <p> </p>
Results of "Ensemble Kalman Filter for the Thermosphere Ionosphere", CHAMP neutral density assimilation into CTIPe for March 20, 2007
<p>These data are the result of assimilating neutral density measurements from the CHAMP satellite on March 20, 2007 into the CTIPe model and and comparison of results with observations made by the GRACE satellite. Data assimilation is performed in three configurations: Configuration (i) is ds, state correction. Configuration (ii) is dfds, both input estimatation and state correction. Configuration (iii) is df, estimation of model inputs only.</p> <p>This data is associated with the following publication:</p> <blockquote> <p>Codrescu S., M.V. Codrescu, and M. Fedrizzi (2018), An Ensemble Kalman Filter for the Thermosphere-Ionosphere, Space Weather, 16, doi:<a href="http://dx.doi.org/10.1002/2017SW001752" title="Link to external resource: 10.1002/2017SW001752">10.1002/2017SW001752</a>.</p> </blockquote> <p> </p>
Dataset of "Black Titanium Oxide/Activated TaS2 Flakes Photoelectrode for Plasmon Assisted Hydrogen Evolution at Neutral pH at High Current Density"
<p>Nanotubular structure of black titania with sputtered gold and incorporation of 3R-TaS2 self-activated flakes for high current density and neutral pH usage for hydrogen evolution reaction. Dataset consists of electrochemical data (LSV, EIS, CA), x-ray difractograms, Raman spectra, SEM images with EDX mapping, UV-vis spectra, DEMS records, ICP-MS records, XPS spectra and compositional analysis and BET records.</p>
Electronic Supplement / Data Archive for "Global Variations in the Time Delays Between Polar Ionospheric Heating and the Neutral Density Response"
<p>These files provide supplemental data to accompany the paper "Global Variations in the Time Delays Between Polar Ionospheric Heating and the Neutral Density Response" submitted to AGU journal <em>Space Weather</em>, with manuscript number 2022SW003410. Details are provided in the file <strong>ReadMe_DataArchive.pdf</strong>.<br> </p>
Electronic Supplement / Data Archive for "Comparison of a Neutral Density Model With the SET HASDM Density Database"
<p>These files provide supplemental data to accompany the paper "Comparison of a Neutral Density Model With the SET HASDM Density Database,” submitted to <em>Space Weather, </em>with manuscript number 2021SW002888. Details are provided in the file DataArchiveDocumentation.pdf.</p>
Improving Neutral Density Predictions Using Exospheric Temperatures Calculated on a Geodesic, Polyhedral Grid
<p>These files provide supplemental data, additional graphs of neutral density predictions, and basic program code and required files, to accompany the paper "Improving Neutral Density Predictions Using Exospheric Temperatures Calculated on a Geodesic, Polyhedral Grid,” published in the journal <em>Space Weather, </em>doi:10.1029/2019SW002355. For more information, refer to the READ_ME.pdf documentation and the journal paper.</p>
Swarm-C Neutral Density Data for Large-Scale Wave (LSW) Structures
Open the record for dataset details and reuse information.
Ionospheric Electron Densities, Neutral Temperature, Winds and Post-processed Output from TIEGCM Simulations in Support of Publication "Physical Processes Driving the Response of the F2-region Ionosphere to the 21 August 2017 Solar Eclipse at Millstone Hill"
This dataset is associated with the publication "Physical Processes Driving the Response of the F2-region Ionosphere to the 21 August 2017 Solar Eclipse at Millstone Hill". In particular, the NCAR- Community model: high-resolution thermosphere-ionosphere-electrodynamics general circulation model (TIEGCM) has been used to investigate the response of ionospheric F2-region electron density (Ne) at Millstone Hill (42.610N, 71.480W, maximum obscuration: 63%) to the Great American Solar Eclipse on 21 August 2017. Two sets of model runs were done, one with the eclipse and the other without. Model outputs of winds, temperatures and electron densities, as well as diagnostic variables of key chemical and physical processes that determined the ionosphere responses to the eclipse, were analyzed and used in producing a paper: Physical Processes Driving the Response of the F2-region Ionosphere to the 21 August 2017 Solar Eclipse at Millstone Hill.
Data repository for Lin et al. (2022) "Thermospheric neutral density variation during the "SpaceX" storm: Implications from physics-based whole geospace modeling"
This dataset contains the necessary data and plotting tools supporting the paper titled "Thermospheric neutral density variation during the "SpaceX" storm: Implications from physics-based whole geospace modeling", by Lin et al., 2022. The data set contains thermospheric mass density simulated by MAGE, TIEGCM, DTM, and MSIS for the 1-6 February 2022 geomagnetic storm event.
Data of GOES X-ray flux, GRACE neutral density, and TIEGCM Simulation for manuscript "On the Relationship between Traveling Atmospheric Disturbances and Traveling Ionospheric Disturbances"
<p>There are data used in manuscript "On the Relationship between Traveling Atmospheric Disturbances and Traveling Ionospheric Disturbances":</p> <ol> <li>GOES 15 0.1-0.8 nm X-ray flux: "xrsa_g15_20170907-08.mat"</li> <li>GRACE neutral density: "GA_DNS_2017_09_07.mat", "GA_DNS_2017_09_08.mat"</li> <li>Simulation of Thermosphere‐Ionosphere‐Electrodynamics General Circulation Model (TIE‐GCM): other files</li> </ol>
Reactions of N2O and CO on neutral Rh10On clusters: A Density Functional Study
<p>Rh10Om structures , optimized using BP86/DZP and octet multiplity in AMS2021.</p>
Data for the paper "Impacts of soft electron precipitations on the neutral density and satellite drag during the 28-29 May 2010 geomagnetic storm"
<p>Data for the paper "Impacts of soft electron precipitations on the neutral density and satellite drag during the 28-29 May 2010 geomagnetic storm" by Qingyu Zhu, Yue Deng, Cheng Sheng, Phil Andersen and Aaron Bukowski</p> <p>GITM_3D.zip: GITM outputs at 12 UT, 05/29/2010 (Figure 3)</p> <p>HPs.zip: NOAA and Z2019 HP (Figure 1)</p> <p>rhos.zip: Neutral density along the GOCE orbit from observation, run1, run2, run3 and JB2008 model (Figures 2 and 4)</p>
Data for "Interhemispheric asymmetry in the high-latitude neutral density variations during the 13-14 March 2022 storm"
<p>DMSP data and GITM outputs used for "Interhemispheric asymmetry in the high-latitude neutral density variations during the 13-14 March 2022 storm".</p> <p>Descriptions of data can be found in ReadMe.txt.</p>
PVO VENUS ONMS CALIBRATED NEUTRAL DENSITY HIGH RES. V1.0
The instrument was designed to determine the composition of the neutral thermosphere/exosphere of Venus. The term composition includes both the type of neutral gases present and their quantitative amount. The measurements begin at the orbit's periapsis altitude and extend to a limiting altitude at which the ambient signal becomes comparable to the gas background and/or detector measurement threshold. The neutral composition includes helium, atomic nitrogen, atomic oxygen, molecular nitrogen, carbon monoxide and carbon dioxide. The data reduction has been described in Niemann et al. (1980a) and Kasprzak et al. (1980).
PVO VENUS ONMS BROWSE NEUTRAL DENSITY 12 SECOND V1.0
The instrument was designed to determine the composition of the neutral thermosphere/exosphere of Venus. The term composition includes both the type of neutral gases present and their quantitative amount. The measurements begin at the orbit's periapsis altitude and extend to a limiting altitude at which the ambient signal becomes comparable to the gas background and/or detector measurement threshold. The neutral composition includes helium, atomic nitrogen, atomic oxygen, molecular nitrogen, carbon monoxide and carbon dioxide. The data reduction has been described in Niemann et al. (1980a) and Kasprzak et al. (1980).
PVO VENUS ONMS CALIBRATED NEUTRAL DENSITY HIGH RES. V1.0
This data set has at least preliminary composition for every data point measured but not necessarily final composition values. The instrument was designed to determine the composition of the neutral thermosphere/exosphere of Venus. The term composition includes both the type of neutral gases present and their quantitative amount. The measurements begin at the orbit's periapsis altitude and extend to a limiting altitude at which the ambient signal becomes comparable to the gas background and/or detector measurement threshold. The neutral composition includes helium, atomic nitrogen, atomic oxygen, molecular nitrogen, carbon monoxide and carbon dioxide. The data reduction has been described in [NIEMANNETAL1980A] and [KASPRZAKETAL1980].
DE 2 Fabry-Perot Interferometer (FPI), Thermospheric Neutral Gas Density, Meridional Wind, and Temperature, 8-sec data
The Fabry-Perot Interferometer, FPI, was a High-Resolution Remote Sensing Instrument designed to measure the Thermospheric Temperature, Meridional Wind, and Density of the following Metastable Atoms: Atomic Oxygen, Singlet S and D, and the 2P State of Ionic Atomic Oxygen. The FPI performed a Wavelength Analysis on the Light detected from the Thermospheric Emission Features by spatially scanning the Interference Fringe Plane with a Multichannel Array Detector. The Wavelength Analysis characterized the Doppler Line Profile of the emitting Species. A Sequential Altitude Scan performed by a Commandable Horizon Scan Mirror provided a Cross-Sectional View of the Thermodynamic and Dynamic State of the Thermosphere below the DE 2 Orbit. The Information obtained from this Investigation was used to Study the Dynamic Response of the Thermosphere to the Energy Sources caused by Magnetospheric Electric Fields and the Absorption of Solar Ultraviolet Light in the Thermosphere. The Instrument was based on the Visible Airglow Experiment, VAE, used in the AE Program. The Addition of a Scanning Mirror, the Fabry-Perot Etalon, an Image Plane Detector, and a Calibration Lamp were the Principal Differences. Interference Filters isolated Lines at 5577, 6300, 7320, 5896, and 5200, in Angstroms. The FPI had a Field of View of 0.53°, Half-Cone Angle. More Details are found in P. B. Hays et al., Space Sci. Instrum., 5(4), 395, 1981. From February 16, 1982 to September 11, 1982 the DE Satellite was inverted and the FPI measured Galactic Emissions. NOTE: Animations of DE2-FPI Science Products have been created as Daily Summary Files. The Animations contain Binned Averages displayed as a Color Code against a Geographic Background. The Bin Sizes are 7.5° Latitude and 24.0° Longitude. The Longitude Bin corresponds to the approximate Separation of adjacent Orbits, assuming that DE2 completed 15 Orbits per Day. The Animations are divided by Day, 06-18 LST, and Night, 18-06 LST, where LST is Local Standard Time. All Summary File Information and Animations employ Spacecraft Orbital Attitude Data. Users should note 1, that the DE2-FPI Experiment acquired Airglow Spectra by imaging the Terrestrial Limb below and ahead of the Spacecraft at an approximate Tangent Altitude of 250 km, 2, All Airglow Spectra were acquired while the DE2 Spacecraft orbited in it's Normal Configuration, which corresponded to Calendar Months August to February in 1981 to 1982 and n 1982 to 1983; 3, The Orbital Inclination of DE2 was 90° implying that DE2-FPI always viewed Ahead along the Meridian; 4, And that DE2 flew in an Elliptical Orbit with Perigee of 305 km and Apogee of 1300 km at Launch ans the Attitude of DE2 for each FPI Measurement is included with each reduced Data Point permitting Users to determine the Tangent Latitude corresponding to the 250 km Terrestrial Airglow Limb. The three GIF Animations are: 1. FPI_brightness.gif, which documents the OI, 630.0 nm,, Column Brightness in Units of log10 Rayleighs. Note different Scales for Day and Night. 2. FPI_temperature.gif, which documents the Neutral Thermosphere Temperature in Units of °Kelvin. 3. FPI_wind.gif, which documents the Line of Sight Neutral Wind Component in Units of m/s. The Wind Direction is positive when the Wind blows away from the approaching Spacecraft.
PVO VENUS ONMS BROWSE NEUTRAL DENSITY 12 SECOND V1.0
This data set was designed to determine the composition of the neutral thermosphere/exosphere of Venus. The term composition includes both the type of neutral gases present and their quantitative amount. The measurements begin at the orbit's periapsis altitude and extend to a limiting altitude at which the ambient signal becomes comparable to the gas background and/or detector measurement threshold. The neutral composition includes helium, atomic nitrogen, atomic oxygen, molecular nitrogen, carbon monoxide and carbon dioxide. The data reduction has been described in [NIEMANNETAL1980A] and [KASPRZAKETAL1980].
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