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Articoli di riviste sul tema "Europe (satellite)"

Autore: Grafiati

Pubblicato: 8 giugno 2024

Ultima modifica: 31 luglio 2025

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1

Chaplin, Jon. "ESA Olympus provides distance learning in Europe." Industry and Higher Education 2, no. 1 (1988): 54–55. http://dx.doi.org/10.1177/095042228800200112.

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OLYMPUS is a programme supported by 8 ESA member states, including the UK, Italy and Canada. Its objectives are to develop and prove, in orbit, key satellite technologies which will be relevant to commercial satellite programmes in the 1990s, and to demonstrate new applications of satellites for communications and broadcasting, stimulating all the players in the game. The use of the satellite for service demonstrations starting in 1989 will be normally free of charge but, in principle, the participating organizations will have to meet all other costs of the demonstration, including transport o

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2

Forssell, Börje. "Loran-C in a European Navigation Perspective." Journal of Navigation 51, no. 2 (1998): 243–49. http://dx.doi.org/10.1017/s0373463398007796.

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After a brief overview of Loran-C system operation and performance, the present situation of the system in Europe is described. Loran-C is now in operation under the NELS agreement in north-western Europe in newly established chain configurations with old and new transmitter positions. Parallel to Loran-C the Russian equivalent, Chayka, is also operating, with three chains in Europe. There is an agreement between Norway and Russia concerning cooperation and possibly joint chain operations between the two system providers in the north; similar agreements in the Baltic and Mediterranean/Black Se

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3

Volkmer, Ingrid. "Satellite cultures in Europe." Global Media and Communication 4, no. 3 (2008): 231–44. http://dx.doi.org/10.1177/1742766508096079.

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4

Vries, Gijs de. "Satellite broadcasting in Europe." Space Policy 3, no. 4 (1987): 288–92. http://dx.doi.org/10.1016/0265-9646(87)90035-x.

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5

Novák, Andrej, and Kristína Kováčiková. "AMSS in Europe." AEROjournal 20, no. 2 (2022): 8–11. http://dx.doi.org/10.26552/aer.c.2022.2.2.

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Nowadays, technology is developing rapidly, therefore satellite and aviation systems need to keep pace with modern trends and new technology. The paper is focused on satellite systems and aviation systems. Based on analysis of the issues it is possible to take measures against problems that may arise in the future. There is a need for satellite-based navigation system that can solve the problems of the existing systems and make the existing systems better and more efficient by providing great convenience to the airspace users for the safe, efficient, comfortable and economical realisation of f

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6

Jaksic, Krsto, Ivana Milosevic, Branimir Jaksic, Vladimir Maksimovic, and Jelena Todorovic. "Structure and share of satellite TV channels and DTH platforms in Europe." Acta Scientiarum. Technology 44 (July 28, 2022): e59237. http://dx.doi.org/10.4025/actascitechnol.v44i1.59237.

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This work deals with the structure of TV channels that are distributed from satellite positions where DTH platforms offer their services in European countries. The structure is being considered via service availability (FTA and PAY TV), resolution (SDTV, HDTV and UHDTV), standards of broadcasting (DVB-S and DVB-S2), satellites and satellite positions, as well as market share of leading satellite operators at European market through which DTH providers do their services to the ultimate users. We also represent the market of TV channel distribution through the number of household which use cable

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7

Forrest, J. R. "Commercial satellite broadcasting for Europe." IEEE Transactions on Broadcasting 34, no. 4 (1988): 443–48. http://dx.doi.org/10.1109/11.16487.

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8

Collins, R. "Public service broadcasting by satellite in Europe: Eurikon and Europa." Screen 34, no. 2 (1993): 162–75. http://dx.doi.org/10.1093/screen/34.2.162.

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9

Kothe, Steffen, Elizabeth Good, André Obregón, Bodo Ahrens, and Helga Nitsche. "Satellite-Based Sunshine Duration for Europe." Remote Sensing 5, no. 6 (2013): 2943–72. http://dx.doi.org/10.3390/rs5062943.

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10

Johnstone, Bill. "New education satellite planned for Europe." Nature 327, no. 6122 (1987): 453. http://dx.doi.org/10.1038/327453c0.

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11

Tydeman, J. "Direct Broadcast Satellite Systems in Europe." IEEE Journal on Selected Areas in Communications 3, no. 1 (1985): 224–32. http://dx.doi.org/10.1109/jsac.1985.1146186.

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12

Veefkind, J. P., G. de Leeuw, C. Robles Gonzalez, and A. Jeuken. "Satellite derived aerosol distributions over Europe." Journal of Aerosol Science 30 (September 1999): S567—S568. http://dx.doi.org/10.1016/s0021-8502(99)80295-x.

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13

Bartholomé, P., G. Berretta, and R. Rogard. "Land mobile satellite services in Europe." Acta Astronautica 20 (January 1989): 197–202. http://dx.doi.org/10.1016/0094-5765(89)90069-6.

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14

Tzallas, Vasileios, Nikolaos Hatzianastassiou, Nikos Benas, et al. "Evaluation of CLARA-A2 and ISCCP-H Cloud Cover Climate Data Records over Europe with ECA&D Ground-Based Measurements." Remote Sensing 11, no. 2 (2019): 212. http://dx.doi.org/10.3390/rs11020212.

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Clouds are of high importance for the climate system but they still remain one of its principal uncertainties. Remote sensing techniques applied to satellite observations have assisted tremendously in the creation of long-term and homogeneous data records; however, satellite data sets need to be validated and compared with other data records, especially ground measurements. In the present study, the spatiotemporal distribution and variability of Total Cloud Cover (TCC) from the Satellite Application Facility on Climate Monitoring (CM SAF) Cloud, Albedo And Surface Radiation dataset from AVHRR

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15

Quintana-Diaz, Gara, Torbjörn Ekman, José Miguel Lago Agra, Diego Hurtado de Mendoza, Alberto González Muíño, and Fernando Aguado Agelet. "In-Orbit Measurements and Analysis of Radio Interference in the UHF Amateur Radio Band from the LUME-1 Satellite." Remote Sensing 13, no. 16 (2021): 3252. http://dx.doi.org/10.3390/rs13163252.

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Radio interference in the uplink makes communication to satellites in the UHF amateur radio band (430–440 MHz) challenging for any satellite application. Interference measurements and characterisation can improve the robustness and reliability of the communication system design. Most published results focus on average power spectrum measurements and heatmaps. We apply a low complexity estimator on an SDR (Software-Defined Radio) to study the interference’s dispersion and temporal variation on-board a small satellite as an alternative. Measuring the Local Mean Envelope (LME) variability with di

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16

Stampoulis, Dimitrios, and Emmanouil N. Anagnostou. "Evaluation of Global Satellite Rainfall Products over Continental Europe." Journal of Hydrometeorology 13, no. 2 (2012): 588–603. http://dx.doi.org/10.1175/jhm-d-11-086.1.

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Abstract An extensive evaluation of two global-scale high-resolution satellite rainfall products is performed using 8 yr (2003–10) of reference rainfall data derived from a network of rain gauges over Europe. The comparisons are performed at a daily temporal scale and 0.25° spatial grid resolution. The satellite rainfall techniques investigated in this study are the Tropical Rainfall Measuring Mission (TRMM) 3B42 V6 (gauge-calibrated version) and the Climate Prediction Center morphing technique (CMORPH). The intercomparison and validation of these satellite products is performed both qualitati

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17

Picard, Robert G. "Book reviews of Television in Europe/Satellite Television in Western Europe." Journal of Media Economics 7, no. 2 (1994): 61–63. http://dx.doi.org/10.1207/s15327736me0702_7.

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18

Völk, Florian, Konstantinos Liolis, Marius Corici, et al. "Satellite Integration into 5G: Accent on First Over-The-Air Tests of an Edge Node Concept with Integrated Satellite Backhaul." Future Internet 11, no. 9 (2019): 193. http://dx.doi.org/10.3390/fi11090193.

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The 5G vision embraces a broad range of applications including the connectivity in underserved and remote areas. In particular, for these applications, satellites are going to play a role in future 5G networks to provide capacity on trains, vessels, aircraft, and for base stations around the globe. In this paper, a 5G edge node concept, developed and evaluated with over-the-air tests using satellites in the geostationary orbit, is presented. The article covers a testbed demonstration study in Europe with a large-scale testbed including satellites and the latest standardization for the network

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19

Hjarvard, Stig. "Richard Collins: Satellite Television in Western Europe." MedieKultur: Journal of media and communication research 7, no. 16 (1991): 2. http://dx.doi.org/10.7146/mediekultur.v7i16.977.

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20

Bartholome, P. "The Future of Satellite Communications in Europe." IEEE Journal on Selected Areas in Communications 5, no. 4 (1987): 615–23. http://dx.doi.org/10.1109/jsac.1987.1146572.

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21

Butler, Declan. "Europe holds fire on spy satellite plan ..." Nature 375, no. 6530 (1995): 350. http://dx.doi.org/10.1038/375350a0.

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22

Geraghty, J. G., and H. L. Young. "Satellite-delivered continuing medical education in Europe." Postgraduate Medical Journal 72, no. 846 (1996): 218–20. http://dx.doi.org/10.1136/pgmj.72.846.218.

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23

Girin, Michel, Gianna Calabresi, Juerg Lichtenegger, Andrea Petrocchi, Alain Febvre, and Camille Lecat. "Oil Spill Monitoring By Satellite: The Ways Towards Making a Reality Out of a Dream." International Oil Spill Conference Proceedings 1999, no. 1 (1999): 919–25. http://dx.doi.org/10.7901/2169-3358-1999-1-919.

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ABSTRACT Despite the good results obtained in a series of experiments performed jointly by satellite image providers and pollution response authorities in Northern Europe, the reluctance to acknowledge the spaceborne data contribution to oil spill surveillance is still considerable. The authors, in part counter pollution professionals, in part experts in satellite imagery interpretation, started to collaborate with background ranging from strong doubts on the suitability of satellite imagery to support pollution control activities, to substantial experience in using radar satellites such as ER

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24

Li, Ran, Chen Wang, Hongyang Ma, et al. "SLR Validation and Evaluation of BDS-3 MEO Satellite Precise Orbits." Remote Sensing 16, no. 11 (2024): 2016. http://dx.doi.org/10.3390/rs16112016.

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Starting from February 2023, the International Laser Ranging Service (ILRS) began releasing satellite laser ranging (SLR) data for all BeiDou global navigation satellite system (BDS-3) medium earth orbit (MEO) satellites. SLR data serve as the best external reference for validating satellite orbits, providing a basis for comprehensive evaluation of the BDS-3 satellite orbit. We utilized the SLR data from February to May 2023 to comprehensively evaluate the orbits of BDS-3 MEO satellites from different analysis centers (ACs). The results show that, whether during the eclipse season or the yaw m

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25

Bakan, S., M. Betancor, V. Gayler, and H. Graßl. "Contrail frequency over Europe from NOAA-satellite images." Annales Geophysicae 12, no. 10/11 (1994): 962–68. http://dx.doi.org/10.1007/s00585-994-0962-y.

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Abstract. Contrail cloudiness over Europe and the eastern part of the North Atlantic Ocean was analyzed for the two periods September 1979 - December 1981 and September 1989 - August 1992 by visual inspection of quicklook photographic prints of NOAA/AVHRR infrared images. The averaged contrail cover exhibits maximum values along the transatlantic flight corridor around 50 °N (of almost 2%) and over western Europe resulting in 0.5% contrail cloudiness on average. A strong yearly cycle appears with a maximum (<2%) in spring and summer over the Atlantic and a smaller maximum (<1%) in winter

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26

Jaksic, Branimir, Mile Petrovic, Krsto Jaksic, Ivana Milosevic, and Ivana Marinkovic. "Development of Satellite High-Definition Television in Europe." Current Science 111, no. 6 (2016): 1037. http://dx.doi.org/10.18520/cs/v111/i6/1037-1044.

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27

Coles, Peter. "Europe launches new-technology education project by satellite." Nature 337, no. 6207 (1989): 496. http://dx.doi.org/10.1038/337496a0.

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28

Loder, Natasha, and Alison Abbott. "… and Europe considers insuring its X-ray satellite." Nature 401, no. 6752 (1999): 415. http://dx.doi.org/10.1038/46633.

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29

Jones, Peter. "The Development of Satellite Television in Western Europe." Service Industries Journal 8, no. 3 (1988): 364–69. http://dx.doi.org/10.1080/02642068800000049.

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30

Urraca, Ruben, Jörg Trentmann, Uwe Pfeifroth, and Nadine Gobron. "Can satellite products monitor solar brightening in Europe?" Remote Sensing of Environment 315 (December 2024): 114472. http://dx.doi.org/10.1016/j.rse.2024.114472.

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31

Visser, A. R. "Development of Land Mobile Satellite Services in Europe." Journal of Navigation 44, no. 2 (1991): 224–32. http://dx.doi.org/10.1017/s0373463300009966.

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32

Bakan, S., M. Betancor, V. Gayler, and H. Graßl. "Contrail frequency over Europe from NOAA-satellite images." Annales Geophysicae 12, no. 10 (1994): 962. http://dx.doi.org/10.1007/s005850050118.

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33

Hondius, F. W. "Copyright Aspects of Television by Satellite in Europe." Yearbook of European Law 5, no. 1 (1985): 125–47. http://dx.doi.org/10.1093/yel/5.1.125.

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34

Collins, Richard. "Satellite Television in Western Europe the Second Generation." Media Information Australia 58, no. 1 (1990): 75–84. http://dx.doi.org/10.1177/1329878x9005800114.

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35

Arbesser-Rastburg, B. R., and G. Brussaard. "Propagation research in Europe using the OLYMPUS satellite." Proceedings of the IEEE 81, no. 6 (1993): 865–75. http://dx.doi.org/10.1109/5.257700.

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36

DIEDERICH, P. "The Development of Civil Satellite Navigation in Europe." Navigation 36, no. 1 (1989): 127–36. http://dx.doi.org/10.1002/j.2161-4296.1989.tb00985.x.

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37

Menzel, W. Paul, Timothy J. Schmit, Peng Zhang, and Jun Li. "Satellite-Based Atmospheric Infrared Sounder Development and Applications." Bulletin of the American Meteorological Society 99, no. 3 (2018): 583–603. http://dx.doi.org/10.1175/bams-d-16-0293.1.

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Abstract Atmospheric sounding of the vertical changes in temperature and moisture is one of the key contributions from meteorological satellites. The concept of using satellite infrared radiation observations for retrieving atmospheric temperature was first proposed by Jean I. F. King. Lewis D. Kaplan noted that the radiation from different spectral regions are primarily emanating from different atmospheric layers, which can be used to retrieve the atmospheric temperature at different heights in the atmosphere. The United States launched the first meteorological satellite Television Infrared O

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38

Sušnik, Andreja, Andrea Grahsl, Daniel Arnold, et al. "Validation of the EGSIEM-REPRO GNSS Orbits and Satellite Clock Corrections." Remote Sensing 12, no. 14 (2020): 2322. http://dx.doi.org/10.3390/rs12142322.

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In the framework of the European Gravity Service for Improved Emergency Management (EGSIEM) project, consistent sets of state-of-the-art reprocessed Global Navigation Satellite System (GNSS) orbits and satellite clock corrections have been generated. The reprocessing campaign includes data starting in 1994 and follows the Center for Orbit Determination in Europe (CODE) processing strategy, in particular exploiting the extended version of the empirical CODE Orbit Model (ECOM). Satellite orbits are provided for Global Positioning System (GPS) satellites since 1994 and for Globalnaya Navigatsionn

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39

Jin, S. G., R. Jin, and D. Li. "Assessment of BeiDou differential code bias variations from multi-GNSS network observations." Annales Geophysicae 34, no. 2 (2016): 259–69. http://dx.doi.org/10.5194/angeo-34-259-2016.

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Abstract. The differential code bias (DCB) of global navigation satellite systems (GNSSs) affects precise ionospheric modeling and applications. In this paper, daily DCBs of the BeiDou Navigation Satellite System (BDS) are estimated and investigated from 2-year multi-GNSS network observations (2013–2014) based on global ionospheric maps (GIMs) from the Center for Orbit Determination in Europe (CODE), which are compared with Global Positioning System (GPS) results. The DCB of BDS satellites is a little less stable than GPS solutions, especially for geostationary Earth orbit (GEO) satellites. Th

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40

Kidd, C., P. Bauer, J. Turk, et al. "Intercomparison of High-Resolution Precipitation Products over Northwest Europe." Journal of Hydrometeorology 13, no. 1 (2012): 67–83. http://dx.doi.org/10.1175/jhm-d-11-042.1.

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Abstract Satellite-derived high-resolution precipitation products (HRPP) have been developed to address the needs of the user community and are now available with 0.25° × 0.25° (or less) subdaily resolutions. This paper evaluates a number of commonly available satellite-derived HRPPs covering northwest Europe over a 6-yr period. Precipitation products include the Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation Analysis (TMPA), the Climate Prediction Center (CPC) morphing (CMORPH) technique, the CPC merged microwave technique, the Naval Research Laboratory (NRL) blended

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41

Hyvärinen, Otto, Kalle Eerola, Niilo Siljamo, and Jarkko Koskinen. "Comparison of Snow Cover from Satellite and Numerical Weather Prediction Models in the Northern Hemisphere and Northern Europe." Journal of Applied Meteorology and Climatology 48, no. 6 (2009): 1199–216. http://dx.doi.org/10.1175/2008jamc2069.1.

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Abstract Snow cover has a strong effect on the surface and lower atmosphere in NWP models. Because the progress of in situ observations has stalled, satellite-based snow analyses are becoming increasingly important. Currently, there exist several products that operationally map global or continental snow cover. In this study, satellite-based snow cover analyses from NOAA, NASA, and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT), and NWP snow analyses from the High-Resolution Limited-Area Model (HIRLAM) and ECMWF, were compared using data from January to

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42

Riffler, M., C. Popp, A. Hauser, F. Fontana, and S. Wunderle. "Validation of a modified AVHRR aerosol optical depth retrieval algorithm over Central Europe." Atmospheric Measurement Techniques Discussions 3, no. 1 (2010): 785–819. http://dx.doi.org/10.5194/amtd-3-785-2010.

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Abstract. The Advanced Very High Resolution Radiometer (AVHRR) carried on board the National Oceanic and Atmospheric Administration (NOAA) and the Meteorological Operational Satellite (MetOp) polar orbiting satellites is the only instrument offering more than 25 years of satellite data to analyse aerosols on a daily basis. The present study assessed a modified AVHRR aerosol optical depth τa retrieval over land. The initial approach has used a relationship between Sun photometer measurements from the Aerosol Robotic Network (AERONET) and the satellite data to post-process the retrieved τa. Here

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43

Riffler, M., C. Popp, A. Hauser, F. Fontana, and S. Wunderle. "Validation of a modified AVHRR aerosol optical depth retrieval algorithm over Central Europe." Atmospheric Measurement Techniques 3, no. 5 (2010): 1255–70. http://dx.doi.org/10.5194/amt-3-1255-2010.

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Abstract. The Advanced Very High Resolution Radiometer (AVHRR) carried on board the National Oceanic and Atmospheric Administration (NOAA) and the Meteorological Operational Satellite (MetOp) polar orbiting satellites is the only instrument offering more than 25 years of satellite data to analyse aerosols on a daily basis. The present study assessed a modified AVHRR aerosol optical depth τa retrieval over land for Europe. The algorithm might also be applied to other parts of the world with similar surface characteristics like Europe, only the aerosol properties would have to be adapted to a ne

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44

Cox, M. E. "SATCOM/ADS: The Key to CNS Integration for ATM in Europe?" Journal of Navigation 48, no. 3 (1995): 361–73. http://dx.doi.org/10.1017/s037346330001287x.

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The availability of an aeronautical mobile satellite service and the emergence of a global navigation satellite system should enable CNS services to be established for civil aviation, virtually worldwide. This paper discusses how the development of a low-cost ADS system, employing these satellite services, might be used to the advantage of European air traffic management (ATM). It indicates that the earlier action is taken, the greater will be the potential benefits. This paper is an updated version of that presented at the NAV94 Conference in November 1994.

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45

Cinzano, P., F. Falchi, C. D. Elvidge, and K. E. Baugh. "The Artificial Sky Brightness in Europe Derived from DMSP Satellite Data." Symposium - International Astronomical Union 196 (2001): 95–102. http://dx.doi.org/10.1017/s0074180900163880.

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We present maps of the artificial sky brightness in Europe in V band with a resolution of ~1 km. The aim is to understand the state of night sky pollution in Europe, to quantify the present situation and to allow future monitoring of trends. For each terrestrial site the artificial sky brightness in a given direction on the sky is obtained by integrating the contributions from each surface area in the surroundings, using detailed models of the propagation in the atmosphere of the upward light flux emitted by the area. The top-of-atmosphere light flux is measured by the Operational Linescan Sys

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46

Sreesawet, Suwat, Seksan Jaturat, and Sittiporn Channamsin. "Orbit Design for Thai Space Consortium Satellite." Proceedings 39, no. 1 (2019): 1. http://dx.doi.org/10.3390/proceedings2019039001.

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Currently, Geo-Informatics and Space Technology Development Agency (GISTDA), National Astronomical Research Institute of Thailand (NARIT) and Synchrotron Light Research Institute (SLRI) have a co-operation on a project of developing a satellite for scientific research called Thai Space Consortium (TSC). The project is aiming at Earth remote sensing mission by a small satellite about 100 kg. The main payload of the satellite is an optical instrument with the secondary payload of energetic particle detector for space weather. The satellite is designed to be in a Sun Synchronous orbit due to requ

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47

Mitikov, Yu, and S. Bilogurov. "SCIENTIFIC-TECHNICAL ASPECTS OF THE WORLD’S FIRST UKRAINIAN SPACE COMPLEX «VESELKA»." Kosmìčna nauka ì tehnologìâ 29, no. 1 (2023): 74–86. http://dx.doi.org/10.15407/knit2023.01.074.

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On October 27, 1961, the first world’s space launch vehicle (not completed and tested well ballistic missile) 11K63 (63S1) with a satellite was launched. The main goal of the new space complex “Veselka” (“Rainbow”) (K11K63) was to define potential branches for the effective usage of space technologies. The weight of the first Ukrainian satellite DS-1 (Dnipropetrovsk satellite) was 310 lbs. The practical usage of new space complex was the launch of artificial satellites weighing up to 990 lbs into low Earth orbit. For comparison, the weight of the first American satellite was 30 lbs. with the 4

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48

Ghilain, Nicolas, Alirio Arboleda, Okke Batelaan, et al. "A New Retrieval Algorithm for Soil Moisture Index from Thermal Infrared Sensor On-Board Geostationary Satellites over Europe and Africa and Its Validation." Remote Sensing 11, no. 17 (2019): 1968. http://dx.doi.org/10.3390/rs11171968.

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Monitoring soil moisture at the Earth’surface is of great importance for drought early warnings. Spaceborne remote sensing is a keystone in monitoring at continental scale, as satellites can make observations of locations which are scarcely monitored by ground-based techniques. In recent years, several soil moisture products for continental scale monitoring became available from the main space agencies around the world. Making use of sensors aboard polar satellites sampling in the microwave spectrum, soil moisture can be measured and mapped globally every few days at a spatial resolution as fi

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49

Venter, Zander S., Tirthankar Chakraborty, and Xuhui Lee. "Crowdsourced air temperatures contrast satellite measures of the urban heat island and its mechanisms." Science Advances 7, no. 22 (2021): eabb9569. http://dx.doi.org/10.1126/sciadv.abb9569.

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Abstract (sommario):

The ubiquitous nature of satellite data has led to an explosion of studies on the surface urban heat island (SUHI). Relatively few have simultaneously used air temperature measurements to compare SUHI with the canopy UHI (CUHI), which is more relevant to public health. Using crowdsourced citizen weather stations (>50,000) and satellite data over Europe, we estimate the CUHI and SUHI intensity in 342 urban clusters during the 2019 heat wave. Satellites produce a sixfold overestimate of UHI relative to station measurements (mean SUHI 1.45°C; CUHI 0.26°C), with SUHI exceeding CUHI in 96% of ci

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PhD, Stella Alexandrova. "Future trends of commercial In- Orbit Satellite Servicing, Active Debris Removal and End-Of Life services." Journal of Physics: Conference Series 2255, no. 1 (2022): 012014. http://dx.doi.org/10.1088/1742-6596/2255/1/012014.

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Abstract (sommario):

Abstract Space debris growth has become a major threat not only to satellites as well as to the safe operations of the International Space Station (ISS). In September 2021, there were more than 4,700 operational satellites, 36,5000 space debris objects larger than 10 cm and 1 000 000 pieces in the 1cm to 10 cm range. The total mass of all space objects in Earth Orbit is 9,600 tonnes[1]. The launches of Starlink, Amazon Kuiper and OneWeb satellite constellations will increase the threat of space debris collisions. Satellite owners, operators, space agencies and commercial players owning the meg

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