'Phase correction' diaporamas de présentation

Review of WVRs in Astronomy

Review of WVRs in Astronomy. (Wiedner). Alan Roy MPIfR. The Troposphere as Seen from Orbit. Method: Synthetic Aperture Radar (Earth Resources Satellite) Frequency: 9 GHz Region: Groningen Interferograms by differencing images from different days. 100 mm. 0 mm. 5 km. -100 mm.

654 views • 51 slides

Review of WVRs in Astronomy

Review of WVRs in Astronomy. (Wiedner). Alan Roy MPIfR. The Troposphere as Seen from Orbit. Method: Synthetic Aperture Radar (Earth Resources Satellite) Frequency: 9 GHz Region: Groningen Interferograms by differencing images from different days. 100 mm. 0 mm. 5 km. -100 mm.

606 views • 51 slides

Spectrometer Pipeline

603 views • 44 slides

The WVR at Effelsberg

The WVR at Effelsberg. Alan Roy Reinhard Keller Ute Teuber Dave Graham Helge Rottmann Walter Alef Thomas Krichbaum. The Scanning 18-26 GHz WVR for Effelsberg. ? = 18.5 GHz to 26.0 GHz D ? = 900 MHz Channels = 24 T receiver = 200 K sweep period = 6 s

621 views • 43 slides

COMPARISON OF WAVE EQUATION MIGRATION METHODS WITH PHASE ENCODING

COMPARISON OF WAVE EQUATION MIGRATION METHODS WITH PHASE ENCODING. Jianhua Yu. University of Utah. CONTENTS. . Introduction . Brief Description of Wave Equation Methods: SSF, PSPI, FFD (SSF+FD) . Phase Encoding Algorithm . Numerical Results . Conclusion and future work. CONTENTS.

555 views • 42 slides

Tracking and Analysis Code for Beam Dynamics in SPring-8:CETRA J. SCHIMIZU : JASRI /SPring-8

SAD2006 : Sep. 05. Tracking and Analysis Code for Beam Dynamics in SPring-8:CETRA J. SCHIMIZU : JASRI /SPring-8. Co-workers: M. Takao and H. Tanaka. Objectives. ?Understanding of Beam Dynamics in S Pring-8 ?Upgraid of Beam Quality in S Pring-8 ?Treatment as exact as possible.

396 views • 27 slides

atmospheric phase correction at the Plateau de Bure interferometer

atmospheric phase correction at the Plateau de Bure interferometer. IRAM interferometry school 2006 Aris Karastergiou. No atmosphere. Interferometers can image astronomical sources by measuring delays in arrival times of incoming wavefronts between pairs of antennas. Effects of the atmosphere.

396 views • 26 slides

310 views • 22 slides

Atmospheric phase correction for ALMA

Atmospheric phase correction for ALMA. Alison Stirling John Richer Richard Hills University of Cambridge Mark Holdaway NRAO Tucson. ALMA Goal. To achieve: Diffraction-limited operation at sub-mm wavelengths on baselines up to 14 km. Corresponds to 0.01 arcsec resolution requirement

372 views • 21 slides

CGSIG MEETING

CGSIG MEETING. PRAGUE.1999. DIFFERENTIAL GPS. POSSIBILTIES & LIMITATIONS. PRECISION AND ACCURACY PRECISION OF GPS ACCURACY OF GPS. PRECISION OF THE GPS SYSTEM. ? = c .? ?? = c . ?? ?? = 3.10 8 m/s . 10 -12 s ?? = 0.3 mm. Tipical satellite path without S/A. U. 6om. 0. 11:54.

265 views • 19 slides

CGSIG MEETING

CGSIG MEETING. PRAGUE.1999. DIFFERENTIAL GPS. POSSIBILTIES & LIMITATIONS. PRECISION AND ACCURACY PRECISION OF GPS ACCURACY OF GPS. PRECISION OF THE GPS SYSTEM. ? = c .? ?? = c . ?? ?? = 3.10 8 m/s . 10 -12 s ?? = 0.3 mm. Tipical satellite path without S/A. U. 6om. 0. 11:54.

301 views • 19 slides

Phase Correction of VLBI with WVRs

Phase Correction of VLBI with WVRs. Alan Roy Ute Teuber Helge Rottmann Reinhard Keller. 230 R G. M 87. Krichbaum et al. 2005. Pushing VLBI to the Highest Resolution:. Some Applications. 86 GHz. M 87 Jet Collimation. Krichbaum et al. 2005. Sgr A* Event Horizon

310 views • 18 slides

EVLA

416 views • 17 slides

VLBI Phase Correction with Effelsberg WVR

VLBI Phase Correction with Effelsberg WVR. A. Roy U. Teuber H. Rottmann R. Keller. Troposphere Seen by VLBI at 86 GHz. The Scanning 18-26 GHz WVR for Effelsberg. March 16th, 2004. The Scanning 18-26 GHz WVR for Effelsberg. Front-end opened. Typical Water Line Spectrum.

241 views • 16 slides

Phase Feed-Forward System

332 views • 15 slides

3rd ACS Workshop and advanced course ESO Garching Headquarter, January 15-19, 2006

201 views • 11 slides