Results 21 to 30 of about 8,678 (295)

SibNet — Siberian Global Navigation Satellite System Network: Current state

Solar-Terrestrial Physics, 2018
In 2011, ISTP SB RAS began to deploy a routinely operating network of receivers of global navigation satellite system signals. To date, eight permanent and one temporal sites in the Siberian region are operating on a regular basis.
Yasyukevich Yu.V., Vesnin A.M., Perevalova N.P.   +2 more
doaj   +1 more source

A Case Study of Polar Cap Sporadic-E Layer Associated with TEC Variations

Remote Sensing, 2021
The Sporadic-E (Es) layer is an often-observed phenomenon at high latitudes; however, our understanding of the polar cap Es layer is severely limited due to the scarce number of measurements.
Yong Wang, Periyadan T. Jayachandran, David R. Themens, Anthony M. McCaffrey, Qing-He Zhang, Shiva David, Richard Chadwick   +6 more
doaj   +1 more source

Scattering and Diffraction in Magnetospheres of Fast Pulsars [PDF]

, 1999
We apply a theory of wave propagation through a turbulent medium to the scattering of radio waves in pulsar magnetospheres. We find that under conditions of strong density modulation the effects of magnetospheric scintillations in diffractive and ...
Anuj Parikh, Blandford R., Gupta Y., Hankins T. H., Kramer M., Maxim Lyutikov, Melrose D. B., Smirnova T. V., Sutton J. M.   +8 more
core   +3 more sources

Influence of geomagnetic disturbances on scintillations of GLONASS and GPS signals as observed on the Kola Peninsula

Solar-Terrestrial Physics, 2023
We have compared effects of geomagnetic disturbances during magnetic storms of various types (CME and CIR) and during an isolated substorm on scintillations of GLONASS and GPS signals, using a Septentrio PolaRx5 receiver installed in Apatity (Murmansk ...
Belahovskiy V. B., Budnikov P. A., Kalishin A. S., Pilgaev S. V., Roldugin A. V.   +4 more
doaj   +1 more source

Validating Ionospheric Scintillation Indices Extracted from 30s-Sampling-Interval GNSS Geodetic Receivers with Long-Term Ground and In-Situ Observations in High-Latitude Regions

Remote Sensing, 2022
As a frequently-occurred phenomenon in the high-latitude region, ionospheric scintillations affect the stable service of the positioning navigation and timing service of the Global Navigation Satellite System (GNSS), calling for an urgent need of ...
Dongsheng Zhao, Qianxin Wang, Wang Li, Shuangshuang Shi, Yiming Quan, Craig M. Hancock, Gethin Wyn Roberts, Kefei Zhang, Yu Chen, Xin Liu, Zemin Hao, Shuanglei Cui, Xueli Zhang, Xing Wang   +13 more
doaj   +1 more source

Analysis of Ionospheric Scintillations using Wideband GPS L1 C/A Signal Data [PDF]

, 2004
A non-real-time GPS receiver has been developed and tested for use in scintillation analysis. The receiver consists of a digital storage receiver and non-real-time software acquisition and tracking algorithms.
Humphreys, Todd E., Kintner, Paul M., Ledvina, Brent M., Psiaki, Mark L.   +3 more
core   +1 more source

A VLA Search for the Geminga Pulsar: A Bayesian Limit on a Scintillating Source [PDF]

, 1999
We derive an upper limit of 3 mJy (95% confidence) for the flux density at 317 MHz of the Geminga pulsar (J0633+1746). Our results are based on 7 hours of fast-sampled VLA data, which we averaged synchronously with the pulse period using a period model ...
Biggs J. D., D. A. Moffett, J. M. Cordes, Kuz’min A. D., Lorimer D. R., M. A. McLaughlin, Merck M., Ramachandran R., Spelstra T. A., T. H. Hankins   +9 more
core   +3 more sources

Ionospheric irregularities and scintillations: a direct comparison of in situ density observations with ground-based L-band receivers

Earth, Planets and Space, 2020
Ionospheric irregularities can affect satellite communication and navigation by causing scintillations of radio signals. The scintillations are routinely measured using ground-based networks of receivers.
Sharon Aol, Stephan Buchert, Edward Jurua   +2 more
doaj   +1 more source

Climatology and modeling of ionospheric scintillations and irregularity zonal drifts at the equatorial anomaly crest region [PDF]

Annales Geophysicae, 2017
In this study the climatology of ionospheric scintillations and the zonal drift velocities of scintillation-producing irregularities are depicted for a station located under the southern crest of the equatorial ionization anomaly.
M. T. A. H. Muella, M. H. Duarte-Silva, A. O. Moraes, E. R. de Paula, L. F. C. de Rezende, L. Alfonsi, B. J. Affonso   +6 more
doaj   +1 more source

SEARCH FOR LOW-INTENSITY INTERFERENCE AND DISTRIBUTIONS OF TRANSIENT SIGNALS’ CHARACTERISTICS IN THE DATA OF DECAMETER SURVEY OF NORTHERN SKY

Radio Physics and Radio Astronomy, 2018
Purpose: The most challenging problem of transient signal research is to prove their cosmic origin. There is no radio telescope at decameter wavelengths, which has an effective area (i.e.
V. V. Zakharenko, I. P. Kravtsov, I. Y. Vasylieva, A. A. Konovalenko, O. M. Ulyanov, V. L. Kolyadin   +5 more
doaj   +1 more source