Search Results - "Mertikas, Stelios P."

Impact of Satellite Attitude on Altimetry Calibration with Microwave Transponders by Kokolakis, Costas, Piretzidis, Dimitrios, Mertikas, Stelios P.

“…Satellite altimetry plays a key role in monitoring changes in sea level and climate change. The quality of satellite altimetry products is commonly ensured…”
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Absolute Calibration of the Chinese HY-2B Altimetric Mission with Fiducial Reference Measurement Standards by Mertikas, Stelios P., Lin, Mingsen, Piretzidis, Dimitrios, Kokolakis, Costas, Donlon, Craig, Ma, Chaofei, Zhang, Yufei, Jia, Yongjun, Mu, Bo, Frantzis, Xenophon, Tripolitsiotis, Achilles, Yang, Lei

“…This research and collaboration work aims at the calibration and validation (Cal/Val) of the Chinese HY-2B satellite altimeter based upon two permanent Cal/Val…”
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Satellite Altimetry: Achievements and Future Trends by a Scientometrics Analysis by Yang, Lei, Lin, Lina, Fan, Long, Liu, Na, Huang, Lingyong, Xu, Yongsheng, Mertikas, Stelios P., Jia, Yongjun, Lin, Mingsen

“…Scientometric reviews, facilitated by computational and visual analytical approaches, allow researchers to gain a thorough understanding of research trends and…”
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The ESA Permanent Facility for Altimetry Calibration in Crete: Advanced Services and the Latest Cal/Val Results by Mertikas, Stelios P., Donlon, Craig, Kokolakis, Costas, Piretzidis, Dimitrios, Cullen, Robert, Féménias, Pierre, Fornari, Marco, Frantzis, Xenophon, Tripolitsiotis, Achilles, Bouffard, Jérôme, Di Bella, Alessandro, Boy, François, Saunier, Jerome

“…Two microwave transponders have been operating in west Crete and Gavdos to calibrate international satellite radar altimeters at the Ku-band. One has been…”
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An Action Plan Towards Fiducial Reference Measurements for Satellite Altimetry by Mertikas, Stelios P., Donlon, Craig, Vuilleumier, Pierrik, Cullen, Robert, Féménias, Pierre, Tripolitsiotis, Achilles

“…Satellite altimeters have been producing, as of 1992, an amazing and historic record of sea level changes. As Europe moves into full operational altimetry, it…”
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Retrieval of Ocean Wave Characteristics via Single Frequency Time-Differenced Carrier Phases from GNSS Buoys by Yang, Lei, Xu, Yongsheng, Jiang, Yingming, Mertikas, Stelios P., Wang, Zhiyong, Zhu, Lin, Liu, Na, Lin, Lina

“…To address challenges in large-scale deployments and real-time wave observations using GNSS buoys, we assessed the reliability and precision of the…”
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Spherical harmonic coefficients of isotropic polynomial functions with applications to gravity field modeling by Piretzidis, Dimitrios, Kotsakis, Christopher, Mertikas, Stelios P., Sideris, Michael G.

“…Various aspects of gravity field modeling rely upon analytical mathematical functions for calculating spherical harmonic coefficients. Such functions allow…”
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Monitoring the Performance of HY-2B and Jason-2/3 Sea Surface Height via the China Altimetry Calibration Cooperation Plan by Yang, Lei, Xu, Yongsheng, Lin, Mingsen, Ma, Chaofei, Mertikas, Stelios P., Hu, Wei, Wang, Zhiyong, Mu, Bo, Zhou, Xinghua

“…Calibration and validation (Cal/Val) of the sea surface height as measured by satellite radar altimeters is essential to understand altimeter biases,…”
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Calibration of an Airborne Interferometric Radar Altimeter over the Qingdao Coast Sea, China by Yang, Lei, Xu, Yongsheng, Zhou, Xinghua, Zhu, Lin, Jiang, Qiufu, Sun, Hanwei, Chen, Ge, Wang, Panlong, Mertikas, Stelios P., Fu, Yanguang, Tang, Qiuhua, Yu, Fangjie

“…Calibration/Validation (Cal/Val) of satellite altimeters is fundamental for monitoring onboard sensor performance and ensuring long-term data quality. As…”
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Fifteen Years of Cal/Val Service to Reference Altimetry Missions: Calibration of Satellite Altimetry at the Permanent Facilities in Gavdos and Crete, Greece by Mertikas, Stelios, Donlon, Craig, Féménias, Pierre, Mavrocordatos, Constantin, Galanakis, Demitris, Tripolitsiotis, Achilles, Frantzis, Xenophon, Tziavos, Ilias, Vergos, George, Guinle, Thierry

“…Satellite altimetry provides exceptional means for absolute and undisputable monitoring of changes in sea level and inland waters (rivers and lakes), over…”
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First preliminary results for the absolute calibration of the Chinese HY-2 altimetric mission using the CRS1 calibration facilities in West Crete, Greece by Mertikas, Stelios P., Zhou, Xinghua, Qiao, Fangli, Daskalakis, Antonis, Lin, Mingsen, Peng, Hailong, Tziavos, Ilias N., Vergos, George, Tripolitsiotis, Achilleas, Frantzis, Xenophon

“…In this work, absolute calibration of the Chinese HY-2 satellite altimetry mission is carried out, employing Pass No. 280 and the calibration facility, CRS1,…”
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First Calibration Results for the SARAL/AltiKa Altimetric Mission Using the Gavdos Permanent Facilities by Mertikas, Stelios P., Daskalakis, Antonis, Tziavos, Ilias N., Vergos, George, Fratzis, Xenofon, Tripolitsiotis, Achilleas

“…This work presents the first calibration results for the SARAL/AltiKa altimetric mission using the Gavdos permanent calibration facilities. The results cover…”
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Monitoring the quality of GPS station coordinates in real time by Mertikas, Stelios P., Damianidis, Kosmas I.

“…This paper evaluates various statistical process control algorithms for monitoring the quality of GPS station coordinates in real-time kinematic applications…”
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Automatic and Online Detection of Small but Persistent Shifts in GPS Station Coordinates by Statistical Process Control by Mertikas, Stelios P.

“…This paper describes algorithms to detect sudden and persistent changes of small magnitude in the GPS baseline solution vectors or station coordinates. The aim…”
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The GAVDOS Mean Sea Level and Altimeter Calibration Facility: Results for Jason-1 by PAVLIS, ERRICOS C., MERTIKAS, STELIOS P.

“…The location of the GAVDOS facility is under a crossing point of the original ground-tracks of TOPEX/Poseidon and the present ones for Jason-1, and adjacent to…”
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Fiducial reference systems for time and coordinates in satellite altimetry by Mertikas, Stelios P., Donlon, Craig, Matsakis, Demetrios, Mavrocordatos, Constantin, Altamimi, Zuheir, Kokolakis, Costas, Tripolitsiotis, Achilles

“…Time is the fundamental measurement in satellite altimetry and the key parameter in building and keeping up a long-term, consistent, and reliable record for…”
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Performance evaluation of the CDN1 altimetry Cal/Val transponder to internal and external constituents of uncertainty by Mertikas, Stelios P., Donlon, Craig, Mavrocordatos, Constantine, Piretzidis, Dimitrios, Kokolakis, Costas, Cullen, Robert, Matsakis, Demetrios, Borde, Franck, Fornari, Marco, Boy, Francois, Tripolitsiotis, Achilles, Guinle, Thierry, Frantzis, Xenophon, Duesmann, Berthyl

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The Western Crete geodetic infrastructure: Long-range power-law correlations in GPS time series using Detrended Fluctuation Analysis by Tserolas, Vasileios, Mertikas, Stelios P., Frantzis, Xenophon

“…The Global Positioning System makes it possible, nowadays, to measure crustal displacements with unprecedented accuracy. These measurements can improve our…”
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Altimetry, bathymetry and geoid variations at the Gavdos permanent Cal/Val facility by Mertikas, Stelios P., Daskalakis, Antonis, Tziavos, Ilias N., Andersen, Ole B., Vergos, George S., Tripolitsiotis, Achilles, Zervakis, Vassilis, Frantzis, Xenofon, Partsinevelos, Panagiotis

“…The aim of this work has been to examine the relationship of steep bathymetry in the coastal areas around the permanent Cal/Val facility of Gavdos, and their…”
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The contribution of local gravimetric geoid models to the calibration of satellite altimetry data and an outlook of the latest GOCE GGM performance in Gavdos by Tziavos, I.N., Vergos, G.S., Mertikas, S.P., Daskalakis, A., Grigoriadis, V.N., Tripolitsiotis, A.

“…The use of geoid heights has been one of the available methodologies utilized for the independent calibration/validation of altimeters on-board satellites…”
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