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24 results for “polar cap”
CHAMP and Swarm solar activity- and height-scaled polar cap plasma density measurements
<p>Solar activity- and height-adjusted plasma density measurements in the polar cap (i.e., above 80° latitude in Modified Apex<sub>110</sub> coordinates) from the Swarm and CHAMP satellites. covering the entire CHAMP mission period (2002–2009) and the Swarm mission period from launch through February 2020.</p> <p>Plasma density measurements are scaled to a nominal solar activity level of <<em>F</em>10.7><sub>27</sub> = 80 sfu, and an altitude of 500 km, as described in Hatch et al. (submitted to JGR: Space Physics; <a href="https://www.essoar.org/doi/abs/10.1002/essoar.10502854.1">ESSOAr pre-print</a>) </p> <p>This dataset was prepared as a part of the "Swarm+ Coupling High-Low Atmosphere Interactions: Ion Outflow" project (<a href="https://swarmoutflow.w.uib.no/">project website</a>) (<a href="https://eo4society.esa.int/projects/swarm-coupling-high-low-atmosphere-interactions-ion-outflow/">ESA website</a>), and is funded by European Space Agency Contract #4000126731.</p> <p>Data are stored in HDF5 format as a Python Pandas dataframe. They can be loaded into Python via the following.</p> <pre><code class="language-python">import pandas as pd df = pd.read_hdf('CHAMP_Swarm_polarcap_adjDensity.hdf',key='df')</code></pre> <p>The data columns are</p> <ul> <li>'NeAdj' : Solar activity- and height-adjusted plasma density (cm<sup>-3</sup>)</li> <li>'a110lat' : Modified Apex<sub>110</sub> latitude (deg)</li> <li>'a110lon' : Modified Apex<sub>110</sub> longitude (deg)</li> <li>'mlt' : Modified Apex<sub>110</sub> magnetic local time</li> <li>'h_km' : satellite altitude (km)</li> <li>'gclat' : geocentric latitude (deg)</li> <li>'gclon' : geocentric longitude (deg)</li> <li>'sat' : satellite identifier (string, one of 'A', 'B',' 'C', or 'CHAMP')</li> </ul>
Polar Cap Patches Detected with RISR-N
<h3>Database of Polar Cap Patches detected with the North face of the Resolute Bay Incoherent Scatter Radar (RISR-N)</h3> <p>This dataset was generated by applying two polar cap patch detection algorithm described to the full RISR-N database.</p> <p>The Ren2018 algorithm was first described in <a href="http://https//doi.org/10.1029/2018JA025621">Ren et al., 2018 (doi:10.1029/2018JA025621)</a>. It includes the time, peak, and prominence of all detected patches, asd well as the average electron and ion temperature and electron density within each patch.</p> <p>The Perry2018 algorithm was first described in <a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018RS006600">Perry & St. Maurice, 2018 (doi:10.1029/2018RS006600)</a>. Instead of a list of patches, this algorithm generates a patch index for each time in the database which corresponds to the percentage of the F-region FoV filled with patches.</p> <p>The script that generates this database in available on GitHub: <a href="https://github.com/Polar-Cap-Scintillation/polar_cap_patch_detection">Polar-Cap-Scintillation/polar_cap_patch_detection</a></p> <p>Version 4 of this dataset includes RISR-N data through 2024 and has an error corrected that may cause some patches to be counted multiple times in the earlier versions.</p>
Supplemental IPWM Run for "Ion heating in the polar cap under northwards IMF Bz": AMPOP_April2016
<p>Full output from the Ionosphere/Polar Wind Model (IPWM) for results published in "Ion heating in the polar cap under northwards IMF Bz", by L. J. Lamarche, R. H. Varney, and A. S. Reimer. This is a simulation of the April 2016 event, with IPWM driven by AMPERE convection maps and Ovation Prime precipitation (AMPOP_April2016). Scripts to visualize these model output and produce the figures in the article are available in a separate repository <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>.</p> <p>If you are configuring the Resen bucket available in <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>, mount this repository to /home/jovyan/mount/AMPOP_April2016_output.</p>
Supplemental IPWM Run for "Ion heating in the polar cap under northwards IMF Bz": SDOP_May2014
<p>Full output from the Ionosphere/Polar Wind Model (IPWM) for results published in "Ion heating in the polar cap under northwards IMF Bz", by L. J. Lamarche, R. H. Varney, and A. S. Reimer. This is a simulation of the May 2014 event, with IPWM driven by SuperDARN convection maps and Ovation Prime precipitation (SDOP_May2014). Scripts to visualize these model output and produce the figures in the article are available in a separate repository <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>.</p> <p>If you are configuring the Resen bucket available in <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>, mount this repository to /home/jovyan/mount/SDOP_May2014_output.</p>
Supplemental IPWM Run for "Ion heating in the polar cap under northwards IMF Bz": SDOP_April2016
<p>Full output from the Ionosphere/Polar Wind Model (IPWM) for results published in "Ion heating in the polar cap under northwards IMF Bz", by L. J. Lamarche, R. H. Varney, and A. S. Reimer. This is a simulation of the April 2016 event, with IPWM driven by SuperDARN convection maps and Ovation Prime precipitation (SDOP_April2016). Scripts to visualize these model output and produce the figures in the article are available in a separate repository <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>.</p> <p>If you are configuring the Resen bucket available in <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>, mount this repository to /home/jovyan/mount/SDOP_April2016_output.</p>
Supplemental IPWM Run for "Ion heating in the polar cap under northwards IMF Bz": AMPOP_May2014
<p>Full output from the Ionosphere/Polar Wind Model (IPWM) for results published in "Ion heating in the polar cap under northwards IMF Bz", by L. J. Lamarche, R. H. Varney, and A. S. Reimer. This is a simulation of the May 2014 event, with IPWM driven by AMPERE convection maps and Ovation Prime precipitation (AMPOP_May2014). Scripts to visualize these model output and produce the figures in the article are available in a separate repository <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>.</p> <p>If you are configuring the Resen bucket available in <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>, mount this repository to /home/jovyan/mount/AMPOP_May2014_output.</p>
Stratigraphic and Isotopic Evolution of the Martian Polar Caps from Paleo-Climate Models
<p>The data in this folder is a collection of outputs or manipulated variables from the LMD-MGCM simulations presented in figures in the JGR article "Stratigraphic and Isotopic Evolution of the Martian Polar Caps from Paleo-Climate Models."<br> </p>
Surface Height Displacements and Time-Variable Gravity From Changes in the Seasonal Polar Cap on Mars
<p>This repository is the location at which the data created for Wagner et al. 2024 is located. Info about specific files is included in the README.</p>
Evolution of plasma properties in 2D particle-in-cell simulations of pulsar polar caps as function of dipole inclination angle
<p>The video shows the evolution of plasma properties in polar cap region of neutron stars from initial simulation conditions to the quasi-periodic pair creation. Three inclination angles of magnetic dipole axis to the star rotation axis are investigate \iota = 0°, 45°, and 90°.</p> <p>The presented quantities are (in rows): Parallel current density, parallel electric field, parallel and perpendicular Poynting flux, electron and positron plasma density, and electron and positron plasma bulk momenta.</p> <p> </p>
The north polar cap of Mars
<p>Thickness of the north polar cap as seen by MARSIS and SHARAD at 213 locations. Thickness of the polar cap as predicted by MOLA assuming that the basement follows the long-wavelength regional slope.</p>
Supplemental High Resolution IPWM Run for "Ion heating in the polar cap under northwards IMF Bz": SDOP_April2016
<p>Full high resolution output from the Ionosphere/Polar Wind Model (IPWM) for results published in "Ion heating in the polar cap under northwards IMF Bz", by L. J. Lamarche, R. H. Varney, and A. S. Reimer. This is a simulation of the April 2016 event, with IPWM driven by SuperDARN convection maps and Ovation Prime precipitation (SDOP_April2016). Scripts to visualize these model output and produce the figures in the article are available in a separate repository <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>.</p> <p>If you are configuring the Resen bucket available in <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>, mount this repository to /home/jovyan/mount/SDOP_April2016_output.</p>
Supplemental High Resolution IPWM Run for "Ion heating in the polar cap under northwards IMF Bz": SDOP_May2014
<p>Full high resolution output from the Ionosphere/Polar Wind Model (IPWM) for results published in "Ion heating in the polar cap under northwards IMF Bz", by L. J. Lamarche, R. H. Varney, and A. S. Reimer. This is a simulation of the May 2014 event, with IPWM driven by SuperDARN convection maps and Ovation Prime precipitation (SDOP_May2014). Scripts to visualize these model output and produce the figures in the article are available in a separate repository <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>.</p> <p>If you are configuring the Resen bucket available in <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>, mount this repository to /home/jovyan/mount/SDOP_May2014_output.</p>
Data from: Interannual and seasonal changes in the south seasonal polar cap of Mars: Observations from MY 28-31 using MARCI
Open the record for dataset details and reuse information.
Small Variations in Ice Composition and Layer Thickness Explain Bright Reflections Below Martian Polar Cap Without Liquid Water
<p>These files include the model results used in Lalich et al. 2024 as well as the code necessary to analyze and reprooduce those results. See README for more detail. </p>
DMSP F16, F17, and F18 Polar Cap Crossings during 2015-2023
<p>Lists of DMSP F16, F17, and F18 northern hemisphere polar cap crossings (called <em>events</em> in the file names) during the years 2015-2023. The lists include the time at which the satellite reaches the highest latitude, as well as the times at which it enters and exits the polar cap, respectively. The entrance and exit times are estimated using DMSP measurements of the ion energy flux.</p>
H2O Ice and CO2 Ice Mixed Lobes at the Edge of Martian South Polar Cap
<p>Relative permittivity estimation of lobes at the edge of Martian south polar cap.</p> <p>The data will be open to access when our article is accepted.</p>
Dataset: Tracking the south polar seasonal cap retreat of Mars using computer vision
<p>These CSV files contain the ellipse fit parameters used for the analysis in Acharya, P. J., Smith, I. B., & Calvin, W. M. (2024). “Tracking the South Polar Seasonal Cap Retreat of Mars Using Computer Vision.” Icarus. DOI: 10.1016/j.icarus.2024.116104. </p> <p>The SPSC ellipse is derived using a mosaic of MARCI images developed by Calvin, W. M., Cantor, B. A., & James, P. B. (2017). Interannual and seasonal changes in the south seasonal polar cap of Mars: Observations from MY 28-31 using MARCI. <em>Icarus</em>, <em>292</em>, 144-153.. Each mosaic is 1000x1000 pixels with a spatial resolution of 0.072246423 Latitude ° per pixel. </p> <p>The file names follow the convention ##.csv, where ## represents the Mars Year (MY). The following table shows what each variable presents. </p> <table> <tbody> <tr> <td><strong>Variable Name</strong></td> <td><strong>Description [Units]</strong></td> </tr> <tr> <td>Ls </td> <td> <p>Solar Lonigude [°]</p> </td> </tr> <tr> <td>Major Axis</td> <td> <p>Semi-major axis value [Latitude °]</p> </td> </tr> <tr> <td>Minor Axis</td> <td> <p>Semi-minor axis value [Latitude °]</p> </td> </tr> <tr> <td>Average Axis</td> <td> <p>Average axis (See publication for more information) [Laitutde °]</p> </td> </tr> <tr> <td>Major_Angle</td> <td> <p>Rotation of the fitted ellipse from 0E (°)</p> </td> </tr> <tr> <td>Dis_Center</td> <td> <p>Distance between the center of the ellipse and the geographical center [Latitude °]</p> </td> </tr> <tr> <td>Center X</td> <td> <p>X coordinate of the center of the ellipse [Pixels]</p> </td> </tr> <tr> <td>Center Y</td> <td> <p>Y coordinate of the center of the ellipse [Pixels]</p> </td> </tr> <tr> <td>Area</td> <td> <p>Area of the ellipse [Squared kilometers]</p> </td> </tr> <tr> <td>Circle_Radius</td> <td> <p>The radius of the circle of best fit [Latitude °]</p> </td> </tr> <tr> <td>Contour_Area</td> <td> <p>Area of the SPSC [Squared kilometers]</p> </td> </tr> </tbody> </table>
Figure Data for Thermophysical Properties of the North Polar Residual Cap of Mars from MGS TES
<p>Includes comma separated value files for data used to generate paper figures. See 'info.txt' for data description.</p>
Modeling polar cap airglow patch intensities using three-dimensional ionospheres produced by data assimilations
<p>Qaanaaq imager data supporting the paper entitled Modeling polar cap airglow patch intensities using three-dimensional ionospheres produced by data assimilations.</p>
A comparative study on the polar cap hot patch and cold patch by using multi-instrument observations
<p>The support videos of paper<A comparative study on the polar cap hot patch and cold patch by using multi-instrument observations> is stored here. and will be updated if needed.</p>
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