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18 results for “VLF”
datasets for "VLF Transmitters and Lightning Generated Whistlers 2: Diffusion of Radiation Belt Electrons"
<p>Supporting information for "VLF Transmitters and Lightning Generated Whistlers 2: Diffusion of Radiation Belt Electrons," submitted to Journal of Geophysical Research Space Physics. Diffusion coefficients for selected values of L and energy due to Very Low Frequency (VLF) transmitters and lightning generated whistlers (LGW), as well as Da0a0 and energy drag rates |dE/dt|/E from Coulomb collisions. Also provided are precipitation lifetimes, which include Da0a0 from plasmaspheric hiss but do not account for energy drag. Calculations are presented for high and low-density plasmasphere models, for all four combinations of ducted or nonducted VLF and LGW waves.</p>
Wideband VLF data observed in New Zealand during the period 07-08 September 2017
<p>Wideband VLF data observed in New Zealand during the period 07-08 September 2017.</p>
VLF phase and amplitude data recorded at Scott Base Antarctica
<p>This dataset contains the phase and amplitude data from VLF radio transmitter NPM (Hawaii, 21.4 kHz, 21.4⁰N, 158.2⁰E) recorded at the field-site for New Zealand's Scott Base, Arrival Heights, in Antarctica (77.8⁰S, 166.8⁰E). The propagation path is ~11 Mm long, oriented nearly north-south, with the mid-point at 28.9⁰S, 164.4⁰W.</p> <p>The data files are formatted as ASCII text files with columns of time (s), amplitude (dB) & phase (degrees) data. The MATLAB script plotUltraMSK.m can be used to plot the data files and an example data plot has been included in the dataset.</p>
Machine Learning Classification Workflow and Datasets for Ionospheric VLF Data Exclusion
<p><span>This data includes the pre-processed dataset, along with a novel workflow that utilizes the PyCaret library and a post-processing workflow. The code and data serve educational purposes in the interdisciplinary field of machine learning and ionospheric physics science, as well as being useful to other researchers for diverse objectives. </span></p> <p><span><span>Acknowledgements:</span></span></p> <p><span><span>The WALDO database (<a href="https://waldo.world"><span>https://waldo.world</span></a>, accessed on October 1, 2023) provides VLF data. It is run collaboratively by the University of Colorado Denver and the Georgia Institute of Technology, utilizing data gathered from Stanford University and those two institutions. It has been made possible by numerous grants from the Department of Defense, NASA, and the NSF.<span> </span></span></span></p> <p> </p> <p> </p>
Radiation theory of VLF waves generated by beating HF waves in the anisotropic ionosphere
<p>Data sets and matlab code supporting for reseach article "Radiation theory of VLF waves generated by beating HF waves in the anisotropic ionosphere".</p>
Using VLF Transmitter Signals at LEO for Plasmasphere Model Validation
<p><strong>VPM_survey_data_2020-03-12.xml </strong>survey electric field data collected between 2020-03-12 00:13:35UT and 2020-03-12 23:59:15 UT</p> <p><strong>vpm_map.cdf.zip</strong> processed VPM survey mode data containing longitude, latitude and power spectral density across the entire mission</p> <p> </p><p> </p> <p></p> <p> </p> <p> </p> <p> </p>
Modulation Analysis of Whistler Mode Sidebands in VLF Triggered Emissions and Implications for Conditions of Nonlinear Growth
<p>A data set from the Siple experiments (Siple Station Antartica) generated on December 8, 1986. A brief explanation of the data:</p> <p>We investigated one particular 35.5 second record that shows the repeated generation of sidebands. This record, occurring on December 8, 1986 during 14:24:29.30 UT -14:24:64.80 UT was triggered by the transmission of a constant amplitude and constant frequency “key down” tone at 2.7 kHz which, remarkably, was observed as 17 individual ∼2 second packets with sidebands and triggered free running emissions in the conjugate region. </p> <p>To open the data, you will need the files - matGetVariable.m AND matGetHeader.m.</p>
Lower ionospheric disturbances due to geomagnetic storms of March & April 2023: inferred from VLF navigational signals and numerical simulations
<p>This is VLF data used in the research paper as per title</p>
Meteor Project Camera and VLF Receiver Data
<p>Meteor project camera and VLF receiver data used in the Figures 4,5, and 8 of Vankawala et al. 2023. Should be used with the codes found on <a href="https://github.com/parakshv/Meteor_Project">Github</a> in order to reproduce the plots.</p>
Dataset for "The VLF Transmitter, Narrowband Receiver, and Tuner Investigation on the DSX Spacecraft" manuscript
<p>Dataset for "The VLF Transmitter, Narrowband Receiver, and Tuner Investigation on the DSX Spacecraft" publication submitted to JGR Space Physics</p>
Simulation data of Nonlinear Signatures of VLF-Triggered Emissions: A Simulation Study
<p>This dataset is obtained from <a href="http://space.rish.kyoto-u.ac.jp/software/">KEMPO1</a> code with minor modifications.</p>
A statistical analysis of tweeks in the mid-low latitudes based on long-term VLF measurements
<p>Figures, data, and code used in my paper describing "A statistical analysis of tweeks in the mid-low latitudes based on long-term VLF measurements"</p>
Investigating the variation of solar terminator using the VLF receiver over Indian low latitude station Dehradun
<p>This is very low frequency dataset used in the research as per title.</p>
Data used in "Spring-fall asymmetry in VLF amplitudes recorded in the North Atlantic region: the fall-effect"
<p>File "VLF_NA_2011-2019.sav", contains the amplitude VLF data used to generate Figure 1, Figure 4a, and Figures S1, S2, and S3 in "Spring-fall asymmetry in VLF amplitudes recorded in the North Atlantic region: the fall-effect". The article was published in Geophysical Research Letters.</p> <p>http://doi.org/10.1029/2021GL094581</p>
Meridional wave power distribution data for article "Latitudinal Dependence of Ground VLF Transmitter Wave Power in the Inner Magnetosphere"
<p>The data are the meridional wave power distribution for the four VLF transmitters: NWC, NAA, NML, and NLK in the inner magnetosphere. Each transmitter has a .mat file, and in each data file, we provide the meridional wave power distribution for both ray tracing simulation (parameter "rt") and ERG observation (parameter "erg"). In each distribution data, the variables "x2d" and "z2d" are the cartesian coordinates in the meridional plane in the unit of Re (the Eearth's radius). x2d=r*cos(theta) and z2d=r*sin*(theta), where r is the radius from the Earth's center, and theta is the magnetic latitude. The variable "power" is the corresponding transmitter wave power in the unit of V^2/m^2.</p>
Supporting data for 2019SW002408: Detection of VLF attenuation in the Earth-ionosphere waveguide caused by X-class solar flares using a global lightning location network
<p>This folder contains data from the World Wide Lightning Location Network (WWLLN) used in the paper "<strong>Detection of VLF attenuation in the Earth-ionosphere waveguide caused by X-class solar flares using a global lightning location network</strong>". </p> <p>Contents:</p> <p>1. readme_2019SW002408.pdf: A detailed explanation of the data files in this folder</p> <p>2. station_list_20170906-10.csv: A table of WWLLN stations used in this analysis</p> <p>3. stroke-station_20170906.csv: A list of lightning strokes detected by WWLLN, and the stations detecting each stroke, for the day September 6, 2017.</p> <p>4. stroke-station_20170910.csv: A list of lightning strokes detected by WWLLN, and the stations detecting each stroke, for the day September 10, 2017.</p>
Wideband VLF data observed in New Zealand on 26 August 2018
<p>Wideband VLF data observed at Halfway Bush, Dunedin, New Zealand on 26th August 2018.</p>
Amplitude and Phase Data for VLF Transmitter Observed in Delaware
<p>This data set includes the mixed down amplitude and phase of two VLF transmitters operated by the U. S. Navy. These are the NLK transmitter located in Jim Creek, WA (48.2 N, 121.9 W) radiating 250 kW at 24.8 kHz and the NML transmitter, located in LaMoure, ND (46.4 N, 98.3 W) radiating 500 kW at 25.2 kHz. The observation location is in Delaware (39.3N, 75.6 W). The time of the recordings corresponds to 12 atmospheric lightning events that created perturbations in these signals. The format is MATLAB version 4. </p>
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