Current status and development tendency of image stabilization system of large aperture space telescope

2014 ◽  
Vol 7 (5) ◽  
pp. 739-748 ◽  
Author(s):  
曹小涛 CAO Xiao-tao ◽  
孙天宇 SUN Tian-yu ◽  
赵运隆 ZHAO Yun-long ◽  
王栋 WANG Dong ◽  
郭权锋 GUO Quan-feng
Keyword(s):  
Current Status ◽  
Stabilization System ◽  
Image Stabilization ◽  
Space Telescope ◽  
Large Aperture ◽  
Development Tendency

scholarly journals Current Status of the Astrometric Capabilities of the Hubble Space Telescope Fine Guidance Sensors

1991 ◽  
Vol 127 ◽  
pp. 68-76
Author(s):  
W.H. Jefferys ◽  
G.F. Benedict ◽  
R.L. Duncombe ◽  
O.G. Franz ◽  
L.W. Fredrick ◽  
...  
Keyword(s):  
Optical System ◽  
Reference Frames ◽  
Optical Axis ◽  
Hubble Space Telescope ◽  
Current Knowledge ◽  
Spherical Aberration ◽  
Radial Distance ◽  
Current Status ◽  
Space Telescope ◽  
Wavefront Error

AbstractThe Fine Guidance Sensors (FGSs) are the instrument of choice for most astrometric measurements with the Hubble Space Telescope (HST). The observed amount of spherical aberration in the Ritchey Chretien optical system does not affect positional measurements with perfectly aligned FGSs because they are interferometers. The FGSs combine wavefronts from points in the exit pupil with other points which are at the same radial distance from the optical axis. Asymmetric aberrations such as coma and astigmatism do affect the measured positions. The current knowledge of the HST wavefront error, the FGS operation and the implications for milliarcsecond relative astrometry are discussed. It is still planned to use the HST to tie the HIPPARCOS and VLBI Reference Frames together at the few milliarcsecond level.

scholarly journals Technology development for the Advanced Technology Large Aperture Space Telescope (ATLAST) as a candidate large UV-Optical-Infrared (LUVOIR) surveyor

2015 ◽  
Author(s):  
Matthew R. Bolcar ◽  
Kunjithapatham Balasubramanian ◽  
Mark Clampin ◽  
Julie Crooke ◽  
Lee Feinberg ◽  
...  
Keyword(s):  
Technology Development ◽  
Advanced Technology ◽  
Space Telescope ◽  
Large Aperture

Motion Correction With Adaptive Karlman Filter

2011 ◽  
Vol 268-270 ◽  
pp. 1768-1772 ◽  
Author(s):  
Yang Ke Liu ◽  
Chun Zhao Lv ◽  
Chang Li
Keyword(s):  
Kalman Filter ◽  
Digital Image ◽  
Motion Correction ◽  
Correction Method ◽  
Observation Error ◽  
Stabilization System ◽  
Movement Model ◽  
Image Stabilization ◽  
System Noise ◽  
Motion Correction Method

In the digital image stabilization system, Kalman filter is the most commonly used filter for motion correction. When the wanted movements have large assumptions deviation with the movement model, the result of motion correction will cause divergence and even error. For this problem, a novel motion correction method with adaptive Karlman filter is proposed. The back and forth characteristic of the unwanted motion and the smoothness characteristic of the wanted motion is used to adjust the system noise and the observation error adaptively. Experiment results show that the proposed method can effectively distinguish the wanted and the unwanted movement. Compared with the method with fixed parameters, the proposed method takes into account the smoothness and delay of wanted motion at the same time and it is more adaptively.

Sign in / Sign up

Export Citation Format

Share Document