Results 11 to 20 of about 485,645 (257)

Precision Calibration of Radio Interferometers Using Redundant Baselines [PDF]

Monthly Notices of the Royal Astronomical Society, 2010
Growing interest in 21 cm tomography has led to the design and construction of broadband radio interferometers with low noise, moderate angular resolution, high spectral resolution, and wide fields of view.
Liu, Adrian, Lutomirski, Andrew, Morrison, Scott, Tegmark, Max, Zaldarriaga, Matias   +4 more
core   +8 more sources

A self-calibration approach for optical long baseline interferometry imaging [PDF]

Journal of the Optical Society of America A, 2008
Current optical interferometers are affected by unknown turbulent phases on each telescope. In the field of radio-interferometry, the self-calibration technique is a powerful tool to process interferometric data with missing phase information. This paper
Benson, Cornwell, Demoment, Fried, Guy Le Besnerais, Haniff, Hogbom, Jennison, Lannes, Lannes, Lannes, Laurent M. Mugnier, Lawson, Meimon, Nityananda, Pauls, Perrin, Perrin, Schloerb, Serge Meimon, Thiébaut   +20 more
core   +3 more sources

Short Baseline Calibration using GPS and EDM Observations

Geofísica Internacional, 2015
Una investigación fue conducida para establecer y comparar una línea base de calibración a partir de mediciones realizadas a los GPS (Sistemas de Posicionamiento Global) y de taquímetro electrónico o EDM (Medición Electrónica de Distancia).
Guadalupe Esteban Vazquez Becerra, Rick A. Bennett, Mijaíl Cordero Chávez, Manuel E. Trejo Soto, José Ramón Gaxiola-Camacho   +4 more
doaj   +2 more sources

Analysis of the calibration quality of the Kyviskes Calibration Baseline [PDF]

Acta Geodaetica et Geophysica, 2015
The authors of the paper present analysis of the baseline calibration results that they have performed. The Kyviskės Calibration Baseline (1320 m) is the longest calibration baseline in Lithuania. The baseline was established by the Institute of Geodesy, VGTU in 1996 for calibration of the EDM instruments.
Birvydiene, Rosita, Buga, Arunas, Kolosovskis, Ricardas, Krikstaponis, Boleslovas, Obuchovski, Romuald, Parseliunas, Eimuntas, Putrimas, Raimundas, Slikas, Dominykas   +7 more
core   +9 more sources

The LOFAR long baseline snapshot calibrator survey [PDF]

Astronomy & Astrophysics, 2015
Aims. An efficient means of locating calibrator sources for international LOw Frequency ARray (LOFAR) is developed and used to determine the average density of usable calibrator sources on the sky for subarcsecond observations at 140 MHz. Methods. We used the multi-beaming capability of LOFAR to conduct a fast and computationally inexpensive survey ...
Moldón, J., Deller, A. T., Wucknitz, O., Jackson, N., Drabent, A., Carozzi, T., Conway, J., Kapińska, A. D., Mckean, P., Morabito, L., Varenius, E., Zarka, P., Anderson, J., Asgekar, A., Avruch, I. M., Bell, M. E., Bentum, M. J., Bernardi, G., Best, P., Bîrzan, L., Bregman, J., Breitling, F., Broderick, J. W., Brüggen, M., Butcher, H. R., Carbone, D., Ciardi, B., de Gasperin, F., de Geus, E., Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Griessmeier, Jean-Mathias, Gunst, A. W., Hamaker, J. P., Hassall, T. E., Heald, G., Hoeft, M., Juette, E., Karastergiou, A., Kondratiev, V. I., Kramer, M., Kuniyoshi, M., Kuper, G., Maat, P., Mann, G., Markoff, S., Mcfadden, R., Mckay-Bukowski, D., Morganti, R., Munk, H., Norden, M. J., Offringa, A. R., Orru, E., Paas, H., Pandey-Pommier, M., Pizzo, R., Polatidis, A. G., Reich, W., Röttgering, H., Rowlinson, A., Scaife, A. M. M., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B. W., Steinmetz, M., Tagger, Michel, Tang, Y., Tasse, C., Thoudam, S., Toribio, M. C., Vermeulen, R., Vocks, C., van Weeren, R. J., White, S., Wise, M. W., Yatawatta, S., Zensus, A.   +84 more
  +14 more sources

LBCS: The LOFAR Long-Baseline Calibrator Survey [PDF]

Astronomy & Astrophysics, 2016
(abridged). We outline LBCS (the LOFAR Long-Baseline Calibrator Survey), whose aim is to identify sources suitable for calibrating the highest-resolution observations made with the International LOFAR Telescope, which include baselines >1000 km. Suitable sources must contain significant correlated flux density (50-100mJy) at frequencies around 110 ...
Jackson, N., Tagore, A., Deller, A., Moldon, J., Varenius, E., Morabito, L., Wucknitz, O., Carozzi, T., Conway, J., Drabent, A., Kapinska, A., Orru, E., Brentjens, M., Blaauw, R., Kuper, G., Sluman, J., Schaap, J., Vermaas, N., Iacobelli, M., Cerrigone, L., Shulevski, A., ter Veen, S., Fallows, R., Pizzo, R., Sipior, M., Anderson, J., Avruch, I. M., Bell, M. E., van Bemmel, I., Bentum, M. J., Best, P., Bonafede, A., Breitling, F., Broderick, J. W., Brouw, W. N., Brueggen, M., Ciardi, B., Corstanje, A., de Gasperin, F., de Geus, E., Eisloeffel, J., Engels, D., Falcke, H., Garrett, M. A., Griessmeier, J. M., Gunst, A. W., van Haarlem, M. P., Heald, G., Hoeft, M., Horandel, J., Horneffer, A., Intema, H., Juette, E., Kuniyoshi, M., van Leeuwen, J., Loose, G. M., Maat, P., McFadden, R., McKay-Bukowski, D., McKean, J. P., Mulcahy, D. D., Munk, H., Pandey-Pommier, M., Polatidis, A. G., Reich, W., Rottgering, H. J. A., Rowlinson, A., Scaife, A. M. M., Schwarz, Dominik, Steinmetz, M., Swinbank, J., Thoudam, S., Toribio, M. C., Vermeulen, R., Vocks, C., van Weeren, R. J., Wise, M. W., Yatawatta, S., Zarka, P.   +78 more
openaire   +22 more sources

Study on Calibration of Chromlum(VI) Analyzer [PDF]

E3S Web of Conferences, 2023
This article presents a novel metrological calibration method for trace chromium(VI) analyzer. The study identifies all factors that affect the accuracy of chromium(VI) analyzers, and proposes calibration items and method for the analyzer based on its ...
Peng Jianchun, Li Xianhong, Liu Ying, Ren Tingting, Mo Hongbo   +4 more
doaj   +1 more source

Analysis and multi-objective optimisation of wind turbine torque control strategies [PDF]

Wind Energy Science, 2023
The combined wind speed estimator and tip-speed ratio (WSE–TSR) tracking wind turbine control scheme has seen recent and increased traction from the wind industry. The modern control scheme provides a flexible trade-off between power and load objectives.
L. Brandetti, L. Brandetti, S. P. Mulders, Y. Liu, S. Watson, J.-W. van Wingerden   +5 more
doaj   +1 more source

Robust, Model-Based External Calibration of Multi-Channel Airborne SAR Sensors Using Range Compressed Raw Data

Remote Sensing, 2019
The paper describes a method for the accurate calibration of multi-channel SAR instruments, such as those required to support SAR polarimetry, single-pass interferometry and digital beam-forming (DBF), on the basis of dedicated SAR acquisitions ...
Marc Jäger, Rolf Scheiber, Andreas Reigber   +2 more
doaj   +1 more source

A Novel Airborne Dual-Antenna InSAR Calibration Method for Backprojection Imaging Model

IEEE Access, 2021
The interferometric synthetic aperture radar (InSAR) elevation inversion method based on the backprojection (BP) imaging model simplifies the interferometric processing chain where image registration and phase unwrapping are not required.
Xiaoning Hu, Bingnan Wang, Maosheng Xiang, Zhongbin Wang   +3 more
doaj   +1 more source