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29 results for “C-band”
Coherence and indistinguishability of highly pure single photons from non-resonantly and resonantly excited telecom C-band quantum dots
<p>ABSTRACT</p> <p>The role of resonant pumping schemes in improving the photon coherence is investigated on InAs/InGaAs/GaAs quantum dots (QDs) emitting in the telecom C-band. The linewidths of transitions of multiple exemplary quantum dots are determined under above-band pumping and resonance fluorescence (RF) via Fourier-transform spectroscopy and resonance scans, respectively. The average linewidth is reduced from (9.74 ± 3.3) GHz in the above-band excitation to (3.50 ± 0.39) GHz under RF underlining its superior coherence properties. Furthermore, the feasibility of coherent state preparation with a fidelity of (49.2 ± 5.8) % is demonstrated, constituting a first step toward on-demand generation of coherent, single, telecom C-band photons directly emitted by QDs. Finally, two-photon excitation of the biexciton is investigated as a resonant pumping scheme. A deconvoluted single-photon purity value of 𝑔(2)HBT(0)=0.072 ± 0.104 and a postselected degree of indistinguishability of 𝑉HOM=0.894 ± 0.109 are determined for the biexciton transition. This represents another step in demonstrating the necessary quantum optical properties for prospective applications.</p>
Data for the Manuscripts of "Variability of Jakarta Rain-Rate Characteristics Associated with the Madden-Julian Oscillation and Topography" and "Subdaily Rain-Rate Properties in Western Java Analyzed Using C-Band Doppler Radar"
<p>This archive consists of the post-processed data of C-Band Doppler Radar (CDR) over Jakarta and surrounding regions for the studies of "Variability of Jakarta Rain-Rate Characteristics Associated with the Madden-Julian Oscillation and Topography" and "Subdaily Rain-Rate Properties in Western Java Analyzed Using C-Band Doppler Radar".</p> <p>The dataset is a gridded rainfall data derived from the local relationship of Z (reflectivity) from the CDR and rainfall (R) from stations. The derived rainfall data are in daily estimates from 2009 to 2012 with the format in NetCDF files.</p> <p>The CDR data were obtained from the projects “Hydrometeorological Array for Intraseasonal Variation-Monsoon Automonitoring (HARIMAU)” (JFY 2005-2009), and the Science Technology Research Partnership for Sustainable Development (SATREPS) “Maritime Continent Center of Excellence (MCCOE) (JFY 2009-2013) of the Japan Science and Technology Agency (JST)/Japan International Cooperation Agency(JICA) under a collaboration of the Agency for the Assessment and Application of Technology (BPPT)-Indonesia and Japan Agency for Marine-earth Science and Technology (JAMSTEC)-Japan.</p>
Fig. 2. Karyotypes arranged from C-banded chromosomes. a in Contributions to the systematic of Pimelodidae (Osteichthyes, Siluriformes): basic and molecular cytogenetics on seven species of Pimelodus from three Brazilian hydrographic systems
Fig. 2. Karyotypes arranged from C-banded chromosomes. a. Pimelodus absconditus; b. Pimelodus britskii; c. Pimelodus maculatus; d. Pimelodus microstoma; e. Pimelodus mysteriosus; f. Pimelodus ortmanni; g. Pimelodus paranaensis. B chromosomes in the boxes. Scales bar = 10 μm.
Fig. 2. Karyotypes treated with the C-banding technique. a in Karyotypic characterization of Prochilodus mariae, Semaprochilodus kneri and S. laticeps (Teleostei: Prochilodontidae) from Caicara del Orinoco, Venezuela
Fig. 2. Karyotypes treated with the C-banding technique. a) Prochilodus mariae - "B" indicates a supernumerary microchromosome; b) Semaprochilodus kneri; and c) Semaprochilodus laticeps.
Data for "Two-stage, low noise quantum frequency conversion of single photons from silicon-vacancy centers in diamond to the telecom C-band"
<p>The silicon-vacancy center in diamond holds great promise as a qubit for quantum communication networks. However, since the optical transitions are located within the visible red spectral region, quantum frequency conversion to low-loss telecommunication wavelengths becomes a necessity for its use in long-range, fiber-linked networks. This work presents a highly efficient, low-noise quantum frequency conversion device for photons emitted by a silicon-vacancy (SiV) center in diamond to the telecom C-band. By using a two-stage difference-frequency mixing scheme SPDC noise is circumvented and Raman noise is minimized, resulting in a very low noise rate of 10.4(7) photons per second as well as an overall device efficiency of 35.6 %. By converting single photons from SiV centers we demonstrate the preservation of photon statistics upon conversion.</p>
Tower-based C-band radar measurements of an alpine snowpack
<p>This repository contains the data presented in the following paper: Brangers, I., Marshall, H.-P., De Lannoy, G., Dunmire, D., Matzler, C., and Lievens, H.: Tower-based C-band radar measurements of an alpine snowpack, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2023-2927, 2023. </p> <p>The data consist of C-band tower based radar data measured in the Idaho Rocky mountains during the snow seasons of 2021-2022 and 2022-2023. The site lies within a local ski area called 'Bogus Basin'. Information about the data collection and processing is presented in the aforementioned paper.</p> <p>The data contains arrays with the timestamps of the measurements, the sampling frequency, and matrices of the time-domain traces of radar bakcscatter at 4 channels (rows=samples/timedomain bins, increases with distance from radar; columns=traces, 1 for each ~hourly timestep ). An example script on how to read and process the data using Matlab is included.</p> <p>For any further questions please contact Isis Brangers (isis.brangers@kuleuven.be) or Hans Lievens (hans.lievens@ugent.be) </p>
eMERLIN test data of 1407+284 at C-band
<p>eMERLIN test data in measurement set (.ms) format of the bandpass calibrator source 1407+284 at C-band for the RadioNet RINGS project. Data has been flagged (including a few minutes at the start of the scan and the end channels of each spectral window) and averaged to 128 channels. The data are in a state ready to test fringe fitting, no initial calibration needs to be done.</p> <p>See the file DD6001_001_20171220_avg_1407+284.listobs.txt (output from the CASA task listobs) for further details of the observation.</p>
SMART-R2 Ground based C-band mobile radar observations of Hurricane Harvey landfall 2017
<p>This dataset contains radar scans collected by Shared Mobile Atmospheric Research and Teaching Radar #2 (SMART-R2) near Woodsboro, Texas during Hurricane Harvey landfall, 25-26 August 2017.</p> <p>Extract the data on a Unix system with the command "tar zxf hurricane_harvey.smart-r2.tar.gz"</p> <p>Directory harvey/SR2/iris_data/product_raw contains the data. The files are in Sigmet raw product format, documented at:<br> ftp://ftp.sigmet.com/outgoing/manuals/IRIS_Programmers_Manual.pdf</p> <p>Directory hurricane_harvey.smart-r2/SR2/log/ contains the radar operator's log.</p> <p>The deployment was funded by RAPID grant AGS-1759479 from the National Science Foundation, funds from the School of Meteorology at the University of Oklahoma, and a NASA Earth and Space Science Fellowship Program grant 17-EARTH17R-72.</p> <p>For more information, please contact:<br> M. I. Biggerstaff drdoppler@ou.edu<br> G. D. Carrie gordon.carrie-1@ou.edu</p> <p> </p>
VLA C-band continuum images of the Central Molecular Zone
<p><strong>VLA C-band continuum images of the Central Molecular Zone</strong></p> <p><strong>The affiliated publication is Lu et al. 2019, ApJS, 244, 35. Please consider to cite it if you use images in this repository.<br> The ADS link is: https://ui.adsabs.harvard.edu/abs/2019ApJS..244...35L/abstract</strong></p> <p><strong>There are four tiles:</strong></p> <ul> <li>Sgr B2</li> <li>Dust Ridge</li> <li>Sgr A</li> <li>Sgr C</li> </ul> <p><strong>For each tile, there are six images</strong> (the PB correction is not by directly dividing the images by PB. The CASA task widebandpbcor is used to perform wideband PB correction)</p> <ul> <li>*_CONT_tclean_nterm2.alpha.fits: PB-uncorrected spectral index.</li> <li>*_CONT_tclean_nterm2.image.tt0.fits: PB-uncorrected image.</li> <li>*_CONT_tclean_nterm2.pb.tt0.fits: Primary beam.</li> <li>*_CONT_tclean_nterm2.pbcor.image.alpha.error.fits: PB-corrected spectral index uncertainty.</li> <li>*_CONT_tclean_nterm2.pbcor.image.alpha.fits: PB-corrected spectral index.</li> <li>*_CONT_tclean_nterm2.pbcor.image.tt0.fits: PB-corrected image.</li> </ul>
ARMOR C-Band Radar Data for 2008-04-11
<p>This data is provided as part of the AMS Radar Conference (2023) Open Radar Course. The data is originally provided by Dr. Larry Carey at the University of Alabama Huntsville. The data is gridded reflectivity on April 11th, 2008. </p>
Data from: Karyotype analysis of four jewel-beetle species (Coleoptera, Buprestidae) detected by standard staining, C-banding, AgNOR-banding and CMA3/DAPI staining
The male karyotypes of Acmaeodera pilosellae persica Mannerheim, 1837 with 2n=20 (18+neoXY), Sphenoptera scovitzii Faldermann, 1835 (2n=38–46), Dicerca aenea validiuscula Semenov, 1895 – 2n=20 (18+Xyp) and Sphaerobothris aghababiani Volkovitsh et Kalashian, 1998 – 2n=16 (14+Xyp) were studied using conventional staining and different chromosome banding techniques: C-banding, AgNOR-banding, as well as fluorochrome Chromomycin A3 (CMA3) and DAPI. It is shown that C-positive segments are weakly visible in all four species which indicates a small amount of constitutive heterochromatin (CH). There were no signals after DAPI staining and some positive signals were discovered using CMA3 staining demonstrating absence of AT-rich DNA and presence of GC-rich clusters of CH. Nucleolus organizing regions (NORs) were revealed using Ag-NOR technique; argentophilic material mostly coincides with positive signals obtained using CMA3 staining.
Animation of Hohenpeissenberg radar reflectivity cross sections (C-band)
<p>This animation displays radar reflectivity cross sections (dBZ) obtained from range height indicator scans plotted over latitude and for altitudes between 0 km and 10 km in a two-minute interval during a one-hour flight above Southern Germany in the scope of the CIRRUS-HL campaign. Data were provided by the MOHp from the <em>Deutscher Wetterdienst</em> (DWD). The orange vertical line marks the LMU radar station that was overpassed during this flight as well. The gray line marks the HALO-aircraft flight path and the black line HALO’s position one min before the cross section is depicted.</p>
Test of gr4-packet-modem through an Intelsat 37e C-band transponder
<p>This dataset contains an IQ recording in SigMF format of the downlink signal of a test of the <a href="https://github.com/daniestevez/gr4-packet-modem/">gr4-packet-modem</a> application done through a C-band transponder on the Intelsat 37e GEO transponder. See "<a href="https://destevez.net/2024/09/testing-gr4-packet-modem-through-a-geo-transponder/">Testing gr4-packet-modem through a GEO transponder</a>" for more details.</p>
Data for the manuscript "The impact of dealiasing biases on bird and insect data products of C-band weather radars and consequences for aeroecological applications" by Weisshaupt et al.
<p>Netcdf files of the analyses in the manuscript "The impact of dealiasing biases on bird and insect data products of C-band weather radars and consequences for aeroecological applications" by Weisshaupt et al. containing flight directions, flight speeds and animal densities in 200-m height layers between 0-1 km from four single PRF and one dual-PRF scans from 10 Finnish polarimetric C-band weather radars between 1-30 Sept 2022 and from the Kankaanpää weather radar between 10 Sept – 30 Oct 2023 and 10 April - 10 June 2024. Bird and insect echoes were identified by the classifier developed by Mäkinen, T., J. Ritvanen, S. Pulkkinen, N. Weisshaupt, and J. Koistinen, 2022: Bayesian Classification of Nonmeteorological Targets in Polarimetric Doppler Radar Measurements. <em>J. Atmos. Oceanic Technol.</em>, <strong>39</strong>, 1561–1578, <a href="https://doi.org/10.1175/JTECH-D-21-0177.1" target="_blank" rel="noopener">https://doi.org/10.1175/JTECH-D-21-0177.1</a>.</p> <p>File names indicate the PRF mode, processing mode (either untreated ("raw") or dealiased ("no_classif")), date and a 5-letter radar id.</p>
Revealing Key Dynamical Mechanisms of a Severe Supercell within a QLCS using Rapid Update 4DVar Assimilation of C-band Phased Array Weather Radar Data
<div> <p>These are data supporting the conclusions of the paper. The observation dataset including sounding data, automatic weather station data and radar data. And Vdras outputs are also provided here. The corresponding scripts are based on python(version 3.9) and NCL (version 6.6.2).</p> <p> </p> </div> <h2>Files</h2>
Data from: Karyotype analysis of four jewel-beetle species (Coleoptera, Buprestidae) detected by standard staining, C-banding, AgNOR-banding and CMA3/DAPI staining
Open the record for dataset details and reuse information.
Fig. 2. Karyotypes arranged from C-banded chromosomes. a in Cytogenetic markers as tools in delimiting species of the highly diverse Neotropical fish Bryconamericus (Characiformes: Characidae)
Fig. 2. Karyotypes arranged from C-banded chromosomes. a. Bryconamericus aff. iheringii (Ijuí River, pattern II); b. B. aff. iheringii (Iguaçu River); c. B. coeruleus (pattern II); d. B. cf. ecai; e. B. cf. eigenmanni. Scales bar = 10 μm.
FIGURE 3 in C-banding karyotypes of two species of Primnoa (Orthoptera: Catantopidae) from Northeast China
FIGURE 3 Idiograms of Cbanding karyotype of P. mandshurica
Figure 1-8 from: Suman V, Kaur H (2013) First report on C-banding, fluorochrome staining and NOR location in holocentric chromosomes of Elasmolomus (Aphanus) sordidus Fabricius, 1787 (Heteroptera, Rhyparochromidae). ZooKeys 319: 283-291. https://doi.org/10.3897/zookeys.319.4265
Figure 1-8 - C-banding (1, 2) 1, 2 Diplotene stages showing distribution of C-bands. Arrows showing heterochromatic chromosomes while arrowhead showing single euchromatic chromosome. Sequence-specific banding (3–6) 3 Diplotene stage with DAPI 4 Diplotene stage with localized CMA3 signals on one autosomal bivalent (shown by arrows) 5 Late diplotene stage with DAPI 6 Late diplotene stage with CMA3. Silver banding (7, 8) 7, 8 Diplotene stages showing location of NORs (shown by arrows) and nucleolar bodies (N). Bar=0.01 mm.
GPM Ground Validation C-band Vantaa (VAN) Radar LPVEx V1
The GPM Ground Validation C-Band Radar datasets include radar reflectivity data from the Vantaa (VAN) dual-polarimetric C-Band Doppler radar in Finland during the Global Precipitation Measurement (GPM) mission Light Precipitation Validation Experiment (LPVEx) field campaign. This radar, along with four others, provided reflectivity measurements for light precipitation systems during LPVEx. This field campaign took place around the Gulf of Finland, aiming to provide additional high-latitude, light rainfall measurements for the improvement of GPM satellite precipitation algorithms. The Vantaa C-Band Radar data files are available in RAW and UF format, with browse imagery in PNG format from September 16, 2010 through January 31, 2011.
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