Preliminary results from the longitudinal dispersion compensation system for the CHARA array

2003 ◽  
Author(s):  
David H. Berger ◽  
Theo A. ten Brummelaar ◽  
William G. Bagnuolo, Jr. ◽  
Harold A. McAlister
Keyword(s):  
Dispersion Compensation ◽  
Compensation System ◽  
Longitudinal Dispersion ◽  
Preliminary Results ◽  
Chara Array

Longitudinal dispersion compensation for the Very Large Telescope Interferometer

1996 ◽  
Vol 239 (2) ◽  
pp. 305-314 ◽  
Author(s):  
Samuel Lévêque ◽  
Bertrand Koehler ◽  
Oskar von der Lühe
Keyword(s):  
Dispersion Compensation ◽  
Longitudinal Dispersion ◽  
Large Telescope ◽  
Very Large Telescope

A novel electrically tunable dispersion compensation system

1999 ◽  
Vol 5 (5) ◽  
pp. 1332-1338 ◽  
Author(s):  
M.J. Erro ◽  
M.A.G. Las ◽  
D. Benito ◽  
M.J. Garde ◽  
M.A. Muriel
Keyword(s):  
Dispersion Compensation ◽  
Compensation System

An adaptive first-order polarization-mode dispersion compensation system aided by polarization scrambling: theory and demonstration

2000 ◽  
Vol 18 (6) ◽  
pp. 832-841 ◽  
Author(s):  
Hok Yong Pua ◽  
K. Peddanarappagari ◽  
Benyuan Zhu ◽  
C. Allen ◽  
K. Demarest ◽  
...  
Keyword(s):  
Dispersion Compensation ◽  
Polarization Mode Dispersion ◽  
Compensation System ◽  
Polarization Mode ◽  
First Order ◽  
Mode Dispersion

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

Cyclic Evolution of Sunspots: Gleaning New Results from Old Data

2000 ◽  
Vol 179 ◽  
pp. 163-165
Author(s):  
S. K. Solanki ◽  
M. Fligge ◽  
P. Pulkkinen ◽  
P. Hoyng
Keyword(s):  
Sunspot Number ◽  
Sunspot Cycle ◽  
Preliminary Results ◽  
Butterfly Diagram

AbstractThe records of sunspot number, sunspot areas and sunspot locations gathered over the centuries by various observatories are reanalysed with the aim of finding as yet undiscovered connections between the different parameters of the sunspot cycle and the butterfly diagram. Preliminary results of such interrelationships are presented.

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