The TerraSAR-X ground calibration system and pattern estimation software

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.

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The CHEOPS instrument on-ground calibration system

10.1117/12.2192895 ◽

2015 ◽

Author(s):

F. P. Wildi ◽

B. Chazelas ◽

A. Deline ◽

M. Sordet ◽

M. Sarajlic

Keyword(s):

Calibration System ◽

Ground Calibration

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The performance of the CHEOPS on-ground calibration system

10.1117/12.2234263 ◽

2016 ◽

Author(s):

B. Chazelas ◽

F. P. Wildi ◽

M. Sarajlic ◽

M. Sordet ◽

A. Deline

Keyword(s):

Calibration System ◽

Ground Calibration

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New programmable calibration system for highly accurate AC current measurements at NIS, Egypt

2008 43rd International Universities Power Engineering Conference ◽

10.1109/upec.2008.4651674 ◽

2008 ◽

Author(s):

A. H. Ahmed ◽

M. Halawa ◽

S. M. Moussa ◽

E. H. Shehab_Eldin ◽

E. M. El-Refaee

Keyword(s):

Calibration System ◽

Ac Current

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Laser beam calibration for wood surface colour treatment

European Journal of Wood and Wood Products ◽

10.1007/s00107-021-01704-3 ◽

2021 ◽

Author(s):

M. Jurek ◽

R. Wagnerová

Keyword(s):

Laser Beam ◽

Power Control ◽

Wood Surface ◽

Laser Power ◽

Production Quality ◽

Chemical Processes ◽

Continuous Control ◽

Calibration System ◽

Laser Engraving ◽

Wood Surfaces

AbstractLaser engraving of photographs on wood surfaces is a challenging task. To optimize the outcome and production quality it is necessary to control every aspect of the laser engraving process. Most of the production machines and technologies overall are mainly focused on laser power control. However, with other systems and deeper knowledge of the wood characteristics it is possible to achieve even better quality. This paper deals with enlarging the number of achievable shades of burned wood and its optimization. A calibration system was developed to control colour shades of engraved wood with a combination of laser power and optic focus. With this approach it is possible to widen achievable palette of engraved shades by continuous control of chemical processes of laser and wood interaction. The production is divided into wood burning and wood carbonization by variation of laser beam focus.

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First in-orbit results of the vector magnetic field measurement of the High Precision Magnetometer onboard the China Seismo-Electromagnetic Satellite

Earth Planets and Space ◽

10.1186/s40623-019-1098-3 ◽

2019 ◽

Vol 71 (1) ◽

Cited By ~ 4

Author(s):

Bin Zhou ◽

Bingjun Cheng ◽

Xiaochen Gou ◽

Lei Li ◽

Yiteng Zhang ◽

...

Keyword(s):

Magnetic Field ◽

High Precision ◽

Magnetic Field Measurement ◽

Vector Data ◽

Magnetic Field Data ◽

Night Side ◽

The Difference ◽

The Magnetic Field ◽

Ground Calibration ◽

Data Calibration

Abstract The High Precision Magnetometer (HPM) is one of the main payloads onboard the China Seismo-Electromagnetic Satellite (CSES). The HPM consists of two Fluxgate Magnetometers (FGM) and the Coupled Dark State Magnetometer (CDSM), and measures the magnetic field from DC to 15 Hz. The FGMs measure the vector components of the magnetic field; while the CDSM detects the magnitude of the magnetic field with higher accuracy, which can be used to calibrate the linear parameters of the FGM. In this paper, brief descriptions of measurement principles and performances of the HPM, ground, and in-orbit calibration results of the FGMs are presented, including the thermal drift and magnetic interferences from the satellite. The HPM in-orbit vector data calibration includes two steps: sensor non-linearity corrections based on on-ground calibration and fluxgate linear parameter calibration based on the CDSM measurements. The calibration results show a reasonably good stability of the linear parameters over time. The difference between the field magnitude calculated from the calibrated FGM components and the magnitude directly measured by the CDSM is just 0.5 nT (1σ) when the linear parameters are fitted separately for the day- and the night-side. Satellite disturbances have been analyzed including soft and hard remanence as well as magnetization of the magnetic torquer, radiation from the Tri-Band Beacon, and interferences from the rotation of the solar wing. A comparison shows consistency between the HPM and SWARM magnetic field data. Observation examples are introduced in the paper, which show that HPM data can be used to survey the global geomagnetic field and monitor the magnetic field disturbances in the ionosphere.

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