Daytime, high-precision star sensor for a stabilized balloon platform

1990 ◽  
Author(s):  
Josiane Costeraste ◽  
Yves Andre
Keyword(s):  
High Precision ◽  
Star Sensor

scholarly journals Results of radiation tests of a new generation high-precision star sensor and its components

2021 ◽  
Vol 18 (6) ◽  
pp. 127-137
Author(s):  
R.V. Bessonov ◽  
◽  
A.A. Kobeleva ◽  
S.A. Prokhorova ◽  
P.S. Smetanin ◽  
...  
Keyword(s):  
High Precision ◽  
Star Sensor ◽  
New Generation

Ground Calibration System Design of High-Precision Star Sensor

2013 ◽  
Vol 694-697 ◽  
pp. 1068-1073
Author(s):  
Jie Duan ◽  
Zhi Yong An ◽  
Xiang Yang Sun
Keyword(s):  
High Precision ◽  
Optical Transmission ◽  
Angular Distance ◽  
Star Sensor ◽  
Optical Navigation ◽  
Calibration System ◽  
Large Size ◽  
High Magnitude ◽  
Design Plan ◽  
Ground Calibration

In order to meet the high precision calibration requirements of precision angular distance and high magnitude to the optical navigation sensor, A new style of high precision star simulator with large caliber, and long-focus, is presented. And then the main compositions of this simulator are designed in detail referring to the simulator, the steering mirror, the standard simulated targets and so on. According to the simulator characteristics of large size lens and multi lens, the structural of lens cone uses the tube sleeve and inner sleeves fixed together means. To eliminate the mirror deformation, the design plan based on the tiny stress is applied in steering mirror. In order to achieve a high magnitude, the light targets are simulated by optical transmission from OLED to high precision drone with fibers. Its degree ≤1〞,simulated magnitude≥5 that meet calibration requirements of the current high-precision optical navigation sensor.

High precision automatic measurement for alignment of camera and star-sensor in GF-2

2017 ◽  
Vol 25 (11) ◽  
pp. 2931-2938 ◽  
Author(s):  
孙刚 SUN Gang ◽  
杨再华 YANG Zai-hua ◽  
万毕乐 WAN Bi-le ◽  
张成立 ZHANG Cheng-li ◽  
代卫兵 DAI Wei-bing
Keyword(s):  
High Precision ◽  
Automatic Measurement ◽  
Star Sensor

Precise Attitude Determination of Ship Based on Star Sensor

2013 ◽  
Vol 380-384 ◽  
pp. 995-1002 ◽  
Author(s):  
Bing Liu ◽  
Feng Chen ◽  
Tong Shuang Zhang ◽  
Dean Zhong ◽  
Lei Yang ◽  
...  
Keyword(s):  
Engineering Design ◽  
High Precision ◽  
Attitude Determination ◽  
Measured Data ◽  
Star Sensor ◽  
Single Star

This paper analyses the attitude measured model and presents the attitude determination algorithm of space TT&C ship (space tracking, telemetry, and command ship) based on single star sensor. Considering lower precision of rolling angel for single star sensor, we proposed an algorithm by integrating attitude determination and redundancy measure to obtain high precision ship attitude data. Aiming at the circumstance of space TT&C ship, the factors that influence the precision of attitude measured data such as the number of star, atmosphere refraction correct and installation elevation are analyzed, which this can provide valuable references to the engineering design for star sensor used on space TT&C ship.

scholarly journals Thermoelectric photodetector cooling system for high precision star sensor

2021 ◽  
Vol 18 (6) ◽  
pp. 109-115
Author(s):  
E.V. Belinskaya ◽  
◽  
R.V. Bessonov ◽  
N.N. Brysin ◽  
S.V. Voronkov ◽  
...  
Keyword(s):  
High Precision ◽  
Cooling System ◽  
Star Sensor

A Method of High-Precision Ground Processing for Star Sensor and Gyro Combination and Accuracy Verification

2016 ◽  
Vol 36 (11) ◽  
pp. 1128002
Author(s):  
范城城 Fan Chengcheng ◽  
王密 Wang Mi ◽  
杨博 Yang Bo ◽  
金淑英 Jin Shuying ◽  
潘俊 Pan Jun ◽  
...  
Keyword(s):  
High Precision ◽  
Star Sensor

Design of Optical System of Very High Precision Star Sensor with Small F-Number

2011 ◽  
Vol 48 (9) ◽  
pp. 092202
Author(s):  
闫佩佩 Yan Peipei ◽  
樊学武 Fan Xuewu
Keyword(s):  
High Precision ◽  
Optical System ◽  
Star Sensor ◽  
Very High

A GPS-Assisted Calibration Algorithm for Misalignment Angle between Star Sensor and Strap-Down Inertial Navigation System

2014 ◽  
Vol 635-637 ◽  
pp. 1457-1463 ◽  
Author(s):  
Yi Ming Zhang ◽  
Wei Wang ◽  
Jie Sui ◽  
Xue Yun Wang
Keyword(s):  
High Precision ◽  
Attitude Control ◽  
Inertial Navigation System ◽  
Space Station ◽  
Alignment Error ◽  
Star Sensor ◽  
Misalignment Angle ◽  
Initial Alignment ◽  
Calibration Technique ◽  
Calibration Algorithm

As a high precision attitude measuring instrument in arc-second level, star sensor has become a necessary component for satellites, spacecraft and space station. However, star sensor misalignment angle can reach the arc-minute level and reduce the accuracy of the star sensor’s output severely. Since it’s difficult to measure the initial alignment error precisely on the ground, research applicable to star sensor misalignment angle calibration technique is necessary. To make the system get a high precision attitude control, a GPS-assisted Kalman filter modeling of the system was carried out. Finally, the misalignment angle from the board axes to the star sensor axes can be estimated by employing the derived relationship. The mathematical simulation results show the effectiveness of the calibration algorithm.

Automatic measurement of SAED patterns from asbestos minerals

1988 ◽  
Vol 46 ◽  
pp. 846-847
Author(s):  
J. C. Russ ◽  
T. Taguchi ◽  
P. M. Peters ◽  
E. Chatfield ◽  
J. C. Russ ◽  
...  
Keyword(s):  
Diffraction Pattern ◽  
High Precision ◽  
Diffraction Data ◽  
Automatic Measurement ◽  
Automatic Method ◽  
Important Method ◽  
X Ray ◽  
Integrated Intensity ◽  
Asbestiform Minerals ◽  
True Center

Conventional SAD patterns as obtained in the TEM present difficulties for identification of materials such as asbestiform minerals, although diffraction data is considered to be an important method for making this purpose. The preferred orientation of the fibers and the spotty patterns that are obtained do not readily lend themselves to measurement of the integrated intensity values for each d-spacing, and even the d-spacings may be hard to determine precisely because the true center location for the broken rings requires estimation. We have implemented an automatic method for diffraction pattern measurement to overcome these problems. It automatically locates the center of patterns with high precision, measures the radius of each ring of spots in the pattern, and integrates the density of spots in that ring. The resulting spectrum of intensity vs. radius is then used just as a conventional X-ray diffractometer scan would be, to locate peaks and produce a list of d,I values suitable for search/match comparison to known or expected phases.

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