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239 results for “eclipse”
The Eclipse Clock-Eclipse on a Polar Day
<p>First place winner in the 2023 IAU OAE Astrophotography Contest, category Still images of the day arc of the Sun and solargraphs: The Eclipse Clock-Eclipse on a Polar Day, by Stephanie Ziyi Ye</p> <p>Constructed by combining multiple images over the course of a 24-hour period, the image was captured in Union Glacier, Antarctica, during the total solar eclipse of 4 December 2021, and showcases the day arc of the Sun. It illustrates the unique phenomenon of a polar day, during which the Sun travels around the sky without setting. During polar days, areas within the polar circles experience 24 hours of continuous daylight, and the Sun doesn’t set for an extended period. The image also offers a rare perspective of a solar eclipse, where the Moon passes between the Sun and Earth, and as viewed from Earth. This can be seen in the lower image of the Sun, where the Moon covers the solar disc.</p> <p>Credit: Stephanie Ziyi Ye/IAU OAE (<a href="https://creativecommons.org/licenses/by/4.0/legalcode">CC BY 4.0</a>)</p>
Solar Eclipse QSO Party Test Waveform
<p>Test waveform and code for the HamSCI Solar Eclipse QSO Party. </p> <p> </p> <p>Version 2: The following changes were made:</p> <ol> <li><strong>Removed downchirps.</strong></li> <li><strong>Eliminate both instances of the fastest 100 Hz/ms chirps. </strong>In V1, these comprise the first group of 5 chirps and the last string of concatenated up/down chirps. There is now ample evidence of problems with the fast chirp rate in radios with both analog and digital audio processing. The fast chirp evidently gets distorted by the multi-pole audio filters used to shape the radio’s passband. In both WA5FRF's original hand-processed data and the automated processing done by students at the University of Scranton, the 100 Hz/ms chirp rate gave very different results than the slower 50, 25, and 10 Hz/ms rates. Not only did the 100 Hz/ms traces not track with the others but they distorted the composite average when included.</li> <li><strong>Add another group of 1 cycle audio pulses with a reduced center frequency of 1000 Hz. </strong>There is evidence the present 1500 Hz center frequency causes a ringing problem similar to the distortion noted with the fastest chirp rate.</li> <li><strong>Preface and conclude the science payload with a ~½ second burst of a 1000 Hz sine wave tone. </strong>This will help with timing for automated data extraction and also serves to confirm the sample rate was correctly interpreted.<br><br></li> </ol> <p>The full signal is composed here: https://github.com/KCollins/seqp </p> <p>V2 of the final signal therefore consists of: </p> <ol> <li>TEST TEST TEST DE <callsign> <grid-square> in Morse code</li> <li>A ½ second 1000 Hz tone burst</li> <li>A 2-second long, non-repeating pseudorandom noise burst</li> <li>5 repetitions of a 1 cycle audio burst at 1000 Hz center frequency</li> <li>5 repetitions of a 1 cycle audio burst at 1500 Hz center frequency</li> <li>5 repetitions of a 50 Hz/ms chirp. (0-5000 Hz in 100 ms)</li> <li>5 repetitions of a 25 Hz/ms chirp. (0-5000 Hz in 200 ms)</li> <li>5 repetitions of a 10 Hz/ms chirp. (0-5000 Hz in 500 ms)</li> <li>Another 2 second PN burst identical to 3.</li> <li>Another ½ second 1000 Hz tone burst.</li> </ol>
ET0002 - CWRU Farm - CHU 7.850 MHz from April 8, 2024 Solar Eclipse
<p>See <a href="https://doi.org/10.5281/zenodo.13293306">10.5281/zenodo.13293306</a> for system documentation. <br>See <a href="https://doi.org/10.5281/zenodo.14004715">10.5281/zenodo.14004715</a> for python code to parse these files. </p> <p>Location: Chagrin Falls, OH. </p> <p>Lat/lon: </p> <table> <tbody> <tr> <td>41.49308889</td> <td>-81.42378287</td> </tr> </tbody> </table>
December 2021 eclipse monitoring of WWV at 10 MHz using Grape 1
<p>Ten days of fldigi recordings in HamSci Grape 1 format of WWV at 10 MHz around the December 2021 eclipse</p>
December 2021 Eclipse data from location QG61mh by VK2ARL using SDRplay RSP2 and FLDIGI
<p>December 2021 Eclipse Festival data gathered by VK2ARL from the signal from WWV on 15.00MHz using a SDRplay RSP2 receiver connected to a horizontal loop antenna at location QG61mh (-28.678 ,153.027) and analysed by FLDIGI. Data droputs on some days were due to unexpected power failures during electrical storms.</p>
Wideband I/Q Recording at VU2PTT for 80m Ham Radio Band during August 21, 2017 Solar Eclipse in USA
<p>Recorded by Prasad Rajagopal, VU2PTT in Bangalore, India</p> <p>Location: Latitude 12°58'24.8"N, Longitude 77°39'15.7"E</p> <p>Grid Locator: MK82tx</p> <p>Recorded using Skimmer Server & CWSL File</p> <p>Playback: Each time stamped I/Q file is a 15 minute slice and can be played back with HDSDR software</p> <p>Antenna was a full size 1/4 wave vertical on 40m (7 MHz)</p> <p>Receiver was a QS1R SDR capable of simultaneously recording 7 bands @ 192 kHz bandwidth </p>
WWVB I/Q for 9 days about 8/21/17 solar eclipse at KD4HSO
<p>WWVB baseband I/Q at KD4HSO</p> <p>100 complex samp/sec, 32 bit floats</p> <p>38.9346576N -94.6560104W</p> <p>RF PRO-1B loop, Ettus N210 + LFRX + GPSDO, GNU Radio down convert + file sink</p> <p>Starting at 23:15 UTC on 8/17/17</p> <p>Ending at 14:57 UTC on 8/27/17</p>
Wideband I/Q Recording at VU2PTT for 40m Ham Radio Band during August 21, 2017 Solar Eclipse in USA - PART 2
<p>Recorded by Prasad Rajagopal, VU2PTT in Bangalore, India</p> <p>Location: Latitude 12°58'24.8"N, Longitude 77°39'15.7"E</p> <p>Grid Locator: MK82tx</p> <p>Recorded using Skimmer Server & CWSL File</p> <p>Playback: Each time stamped I/Q file is a 15 minute slice and can be played back with HDSDR software</p> <p>Antenna was a full size 1/4 wave vertical on 40m (7 MHz)</p> <p>Receiver was a QS1R SDR capable of simultaneously recording 7 bands @ 192 kHz bandwidth </p>
Wideband I/Q Recording at VU2PTT for 40m Ham Radio Band during August 21, 2017 Solar Eclipse in USA - PART 1
<p>Recorded by Prasad Rajagopal, VU2PTT in Bangalore, India</p> <p>Location: Latitude 12°58'24.8"N, Longitude 77°39'15.7"E</p> <p>Grid Locator: MK82tx</p> <p>Recorded using Skimmer Server & CWSL File</p> <p>Playback: Each time stamped I/Q file is a 15 minute slice and can be played back with HDSDR software</p> <p>Antenna was a full size 1/4 wave vertical on 40m (7 MHz)</p> <p>Receiver was a QS1R SDR capable of simultaneously recording 7 bands @ 192 kHz bandwidth </p>
Wideband I/Q Recording at VU2PTT for 30m Ham Radio Band during August 21, 2017 Solar Eclipse in USA
<p>Recorded by Prasad Rajagopal, VU2PTT in Bangalore, India</p> <p>Location: Latitude 12°58'24.8"N, Longitude 77°39'15.7"E</p> <p>Grid Locator: MK82tx</p> <p>Recorded using Skimmer Server & CWSL File</p> <p>Playback: Each time stamped I/Q file is a 15 minute slice and can be played back with HDSDR software</p> <p>Antenna was a full size 1/4 wave vertical on 40m (7 MHz)</p> <p>Receiver was a QS1R SDR capable of simultaneously recording 7 bands @ 192 kHz bandwidth </p>
Wideband I/Q Recording at VU2PTT for 20m Ham Radio Band during August 21, 2017 Solar Eclipse in USA
<p>Recorded by Prasad Rajagopal, VU2PTT in Bangalore, India</p> <p>Location: Latitude 12°58'24.8"N, Longitude 77°39'15.7"E</p> <p>Grid Locator: MK82tx</p> <p>Recorded using Skimmer Server & CWSL File</p> <p>Playback: Each time stamped I/Q file is a 15 minute slice and can be played back with HDSDR software</p> <p>Antenna was a full size 1/4 wave vertical on 40m (7 MHz)</p> <p>Receiver was a QS1R SDR capable of simultaneously recording 7 bands @ 192 kHz bandwidth </p>
Wideband I/Q Recording at VU2PTT for 15m Ham Radio Band during August 21, 2017 Solar Eclipse in USA
<p>Recorded by Prasad Rajagopal, VU2PTT in Bangalore, India</p> <p>Location: Latitude 12°58'24.8"N, Longitude 77°39'15.7"E</p> <p>Grid Locator: MK82tx</p> <p>Recorded using Skimmer Server & CWSL File</p> <p>Playback: Each time stamped I/Q file is a 15 minute slice and can be played back with HDSDR software</p> <p>Antenna was a full size 1/4 wave vertical on 40m (7 MHz)</p> <p>Receiver was a QS1R SDR capable of simultaneously recording 7 bands @ 192 kHz bandwidth </p>
Wideband I/Q Recording at VU2PTT for 10m Ham Radio Band during August 21, 2017 Solar Eclipse in USA
<p>Recorded by Prasad Rajagopal, VU2PTT in Bangalore, India</p> <p>Location: Latitude 12°58'24.8"N, Longitude 77°39'15.7"E</p> <p>Grid Locator: MK82tx</p> <p>Recorded using Skimmer Server & CWSL File</p> <p>Playback: Each time stamped I/Q file is a 15 minute slice and can be played back with HDSDR software</p> <p>Antenna was a full size 1/4 wave vertical on 40m (7 MHz)</p> <p>Receiver was a QS1R SDR capable of simultaneously recording 7 bands @ 192 kHz bandwidth </p>
Reverse Beacon Network Download for Eclipse Data at Corvallis, OR (massaged)
<p>The upload contains an Eclipse Excel spreadsheet that is enhanced from a Reverse Beacon Network (RBN) export, and sorted by receiving callsign and Zulu PM time during the eclipse and 15 minutes before and for a period from 8:45 to 12:30, local Corvallis time. The experiment looked at the RBN sites who received CW signals from the callsign WG0R, which was transmitting test messages at 100 Watts using the below station resources.</p> <p>The transmission resources are: Elecraft KX3, KXPA100, and PX3 transceiver, 100 Watt amplifier, and Panadapter, driving a Carolina Windom Antenna at 10 meterrs above ground level, strung at 150 to 330 degrees in two Oak trees.</p> <p> </p>
2017 August 21 WL7C Solar Eclipse Reverse Beacon Raw Data from Grid EM66HN
<p><strong>Craig Daniel Fry WL7C, EM66HN</strong></p> <p><strong>Lat/Lon: 36.561667, -87.376667</strong></p> <p><strong>Antennae Type: Fan Dipole</strong></p> <p><strong>Antenna Pointing Direction: Near Vertical Incidence Skywave (NVIS), Dipole listening NE-SW; approx 20ft in height, 80 ft loaded dipole</strong></p> <p><strong>Receiver Type:SDRPlay SP2 pro</strong></p> <p><strong>Additional Notes: </strong></p> <p><strong>(1)The CSV fi</strong><strong>le is a diary of the spots reported to the Reverse Beacon Network and pertinent timing, narrow frequency bands, and dx call signs</strong></p> <p><strong>(2) Software used: HDSDR, CWSkimmer</strong></p>
ECLIPSE WP2 Review bibliography
<p><span>The dataset contains the bibliography described in a comprehensive review of the PCR-free Innovative strategies for SARS-CoV-2 detection, which the contributors published in the Advanced Healthcare Materials journal. The dataset includes all significant and most recent papers, published between 2022 and 2023, and focuses on those detection strategies that have not been thoroughly investigated yet. The dataset is a useful tool for all the researchers that want to update their knowledge in the field.</span></p>
Supplementary online material for KIC 4150611: A quadruply eclipsing heptuple star system with a g-mode period-spacing pattern. Eclipse modelling of the triple and spectroscopic analysis
<p>Additional figures and data supplementary to the published (or soon-to-be-published) paper KIC 4150611: A quadruply eclipsing heptuple star system with a g-mode period-spacing pattern Eclipse modelling of the triple and spectroscopic analysis.</p> <p> </p>
AK0SK CHU 7.850 MHz from April 8, 2024 Solar Eclipse
<p>Radio: FTDX-1200, Hustler 5BTV</p> <p>Antenna: Vertical omnidirectional</p> <p>GPS-disciplined: Yes</p> <p>Potential QRM: Nearby commercial AM radio transmitter</p>
K5UTD CHU 7.850 MHz from April 8, 2024 Solar Eclipse
<p>Alice Beideck KI1TEN, Eric Mutton KJ5DIF, Ronald Dang K5SUS<br><br>Radio: <span>Yaesu FT-1000MP</span></p> <p><span>Antenna: <span>Crushcraft R7000 Vertical, Mounted 3 stories on roof</span></span></p> <p><span>GPS-disciplined: No</span></p> <p><span>AGC: Off</span></p> <p><span>Lat/Lon:</span></p> <table> <tbody> <tr> <td>32.98706034</td> <td>-96.75054227</td> </tr> </tbody> </table> <p> </p>
K8EOD CHU 14.670 MHz from April 8, 2024 Solar Eclipse
<p>Radio: Yaesu FT-817</p> <p>GPS-Disciplined: No</p> <p>AGC: Off</p> <p>Antenna: Long wire oriented NW/SE Used throughout</p> <p>Lat/Lon:</p> <table> <tbody> <tr> <td>43.2548005</td> <td>-86.2689067</td> </tr> </tbody> </table> <p>Notes:</p> <p><span>It appears that the software could only record 5 GB segments. I was alerted to this possibility after the period started. There was no way for me to know if it was actually happening. Thus, my file size is only 5GB or about 21 hours. Bummer! </span></p> <p><span>The 20 meter signal was strong during the several days it took to set up the station. It remained strong for a short time after the start and then disappeared. It came back very strong a few times during the two weeks of operation.</span></p>
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.