Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Viktor Pek"'
Autor:
Vicente Pastoriza, Petr Pešice, Laurent Quibus, Andrej Vilhar, Flavio Jorge, George Goussetis, Antonio Martellucci, Apostolos Z. Papafragkakis, Ondrej Fiser, James A. Nessel, Emal Rumi, Martin Grabner, Arsim Kelmendi, Danielle Vanhoenacker-Janvier, Andrej Hrovat, Fernando Perez Fontan, Charilaos I. Kourogiorgas, Spiros Ventouras, Susana Mota, Armando Rocha, Athanasios D. Panagopoulos, R. Reeves, Viktor Pek, Alexios Costouri, Fernando Machado
Publikováno v:
International Journal of Satellite Communications and Networking
International Journal of Satellite Communications and Networking, Vol. Special Issue, no.6, p. 477-501 (2019)
International Journal of Satellite Communications and Networking, Vol. Special Issue, no.6, p. 477-501 (2019)
The upcoming migration of satellite services to higher bands, namely, the Ka‐ and Q/V‐bands, offers many advantages in terms of bandwidth and system capacity. However, it poses challenges as propagation effects introduced by the various atmospher
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7427aec4b3c62eef98e8d89ed5195fe1
https://doi.org/10.1002/sat.1313
https://doi.org/10.1002/sat.1313
Publikováno v:
2017 Conference on Microwave Techniques (COMITE).
This paper describes special Ka- and Q-band receiver for the Alphasat signal developed for the Institute of Atmospheric Physics (IAP) Prague and first operational experiences with it. The signal level monitoring enables us to derive the atmospheric a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f8f97e056fa9ee9b12b706735298823
https://doi.org/10.1109/comite.2017.7932355
https://doi.org/10.1109/comite.2017.7932355
Autor:
Viktor Pek, Ondrej Fiser
Publikováno v:
2017 Conference on Microwave Techniques (COMITE).
In this contribution we describe selected attenuation events recorded by the "Alphasat" satellite receiver at the Institute of Atmospheric Physics (IAP) in Prague. First of all we compare the attenuation course and the rain rate course - good correla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::170653c81f0281db3ebcd1aff60807b6
https://doi.org/10.1109/comite.2017.7932356
https://doi.org/10.1109/comite.2017.7932356
Publikováno v:
2017 11th European Conference on Antennas and Propagation (EUCAP).
Attenuation time series measured on the satellite-to-ground path in Prague in frequency bands 19 and 39 GHz and simultaneously measured rain intensity are analyzed statistically using one-year dataset. Frequency scaling is described by linear models.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a57e61ff411227c317a7119045f838aa
https://doi.org/10.23919/eucap.2017.7928593
https://doi.org/10.23919/eucap.2017.7928593
Publikováno v:
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA).
The satellite signal drop can be caused either by atmospheric attenuation (rain, clouds, snow, …) either by unwanted satellite motion. This contribution demonstrates the software methods to extract the atmospheric attenuation from signal level reco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eacc97649e2bc055409f91fe3b02c0b4
https://doi.org/10.1109/radioelek.2016.7477397
https://doi.org/10.1109/radioelek.2016.7477397
Publikováno v:
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA).
The article deals with description of spatial motion of the experimental radio-communications satellite Alphasat. The used Cartesian coordinates of the Alphasat satellite (given one week in advance in the OEM files of 5 minute resolution) are describ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a1234417b50729bf27c8d0da0867bfd
https://doi.org/10.1109/radioelek.2016.7477396
https://doi.org/10.1109/radioelek.2016.7477396
Publikováno v:
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA).
This contribution is describing interesting attenuation events in 39 and 19 GHz frequency bands using the measurement of signal of satellite Alphasat in Prague. Rain rates at two sites were measured continuously. A table of highest measured attenuati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10190cf5dcd43df634af0c3f31a84c53
https://doi.org/10.1109/radioelek.2016.7477398
https://doi.org/10.1109/radioelek.2016.7477398
Publikováno v:
The 8th European Conference on Antennas and Propagation (EuCAP 2014).
Atmospheric turbulences cause fast fading of the free space optical links. This document shows our first experimental results of measurement of the structure parameter of refractivity index C n 2 and its relation to free space optical attenuation on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4a67e0bc9fec250a7c5318a12cabacf
https://doi.org/10.1109/eucap.2014.6901946
https://doi.org/10.1109/eucap.2014.6901946