400～900 nm Spectral Irradiance of Cryogenic Radiometer-Based Irradiance Standard Lamp Using System Level Calibration Method

2010 ◽  
Vol 30 (11) ◽  
pp. 3349-3353
Author(s):  
陈洪耀 Chen Hongyao ◽  
张黎明 Zhang Liming ◽  
邹鹏 Zou Peng ◽  
谢萍 Xie Ping ◽  
郑小兵 Zheng Xiaobing ◽  
...  
Keyword(s):  
Calibration Method ◽  
Spectral Irradiance ◽  
System Level ◽  
Cryogenic Radiometer ◽  
Standard Lamp

scholarly journals Calibration method for direct conversion receiver front-ends

2008 ◽  
Vol 6 ◽  
pp. 119-124
Author(s):  
R. Müller ◽  
H.-J. Jentschel
Keyword(s):  
Analog Circuits ◽  
Calibration Method ◽  
Direct Conversion ◽  
Optimization Techniques ◽  
System Level ◽  
Evaluation Functions

Abstract. Technology induced process tolerances in analog circuits cause device characteristics different from specification. For direct conversion receiver front-ends a system level calibration method is presented. The malfunctions of the devices are compensated by tuning dominant circuit parameters. Thereto optimization techniques are applied which use measurement values and special evaluation functions.

Study on Calibration Method of Spectral Irradiance Responsivity for Space Ultraviolet Remote Sensing Instrument

2010 ◽  
Vol 30 (6) ◽  
pp. 1816-1821
Author(s):  
Zhang Zhenduo ◽  
Wang Shurong ◽  
Li Futian ◽  
Huang Yu ◽  
Qu Yi Lin Guanyu
Keyword(s):  
Remote Sensing ◽  
Calibration Method ◽  
Spectral Irradiance ◽  
Ultraviolet Remote Sensing

System-Level Calibration Method for High-Precision Fiber Optic Platform System

2021 ◽  
Author(s):  
Wen Zhang ◽  
Tingjun Wang ◽  
Mingyuan Liu ◽  
Lei Wang ◽  
Tao Tao
Keyword(s):  
High Precision ◽  
Fiber Optic ◽  
Calibration Method ◽  
System Level ◽  
Platform System

Illuminance meter calibration with an LED spectrally tunable light source

2020 ◽  
Vol 52 (8) ◽  
pp. 1009-1019 ◽  
Author(s):  
K Godo ◽  
Y Tamura ◽  
O Watari
Keyword(s):  
Light Source ◽  
Calibration Method ◽  
Reference Plane ◽  
Lamp Method ◽  
Calibration System ◽  
Indoor Lighting ◽  
Incandescent Lamps ◽  
Standard Lamp

Calibration of an illuminance meter is indispensable for accurate measurement of the illuminance of indoor lighting and daylight. In recent years, because of the phasing-out of incandescent lamps and their replacement with LED lamps, it has become difficult to obtain an incandescent type standard lamp to calibrate an illuminance meter. To replace the standard lamp method, we constructed an illuminance meter calibration system based on an LED-based spectrally tunable light source. The approximate CIE Illuminant A spectrum realized by the LED-based spectrally tunable light source was controlled at various illuminance values (800–10,000 lx). A test illuminance meter was calibrated by comparison against a reference photometer with the realized approximate Illuminant A spectrum. The illuminance values measured using the reference photometer and using the test illuminance meter in the calibration system agreed within 2.5% without reference plane correction of the test illuminance meter, and within 1% with reference plane correction. Reference plane correction depends strongly on the measurement distance and the illuminance meter structure. This study demonstrated that it can be improved. Therefore, we infer that an illuminance meter calibration method using an LED-based spectrally tunable light source is a promising means of overcoming difficulties posed by the phasing-out of incandescent standard lamps.

Radiometric Correction of Raman Spectra

1980 ◽  
Vol 34 (3) ◽  
pp. 323-326 ◽  
Author(s):  
F. J. Purcell ◽  
R. Kaminski ◽  
E. Russavage
Keyword(s):  
Raman Spectra ◽  
Wide Frequency Range ◽  
Data System ◽  
Spectral Irradiance ◽  
Correction Factors ◽  
Frequency Range ◽  
Radiometric Correction ◽  
Corrected Data ◽  
Estimated Error ◽  
Standard Lamp

A method for the radiometric correction of Raman spectra over a wide frequency range utilizing a standard lamp and a microprocessor data system is described. The spectral irradiance factors of the standard lamp are entered into the data system, and the lamp spectrum is run and divided by the irradiances to generate correction factors. These factors are then applied to the data. The effects of different excitation frequencies, slit widths, sample size and state, and collection optics are discussed. The estimated error in the corrected data is ±5% over the frequency range of 21 839 to 17 000 cm−1.

Research on System Level Calibration Method of Multi-Band Filter Radiometer

2013 ◽  
Vol 33 (8) ◽  
pp. 0812004 ◽  
Author(s):  
张艳娜 Zhang Yanna ◽  
郑小兵 Zheng Xiaobing ◽  
李健军 Li Jianjun ◽  
张伟 Zhang Wei
Keyword(s):  
Calibration Method ◽  
System Level ◽  
Band Filter ◽  
Filter Radiometer ◽  
Multi Band

scholarly journals A System-Level Self-Calibration Method for Installation Errors in A Dual-Axis Rotational Inertial Navigation System

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 4005 ◽  
Author(s):  
Bai ◽  
Lai ◽  
Lyu ◽  
Xu ◽  
Liu ◽  
...  
Keyword(s):  
Navigation System ◽  
Inertial Navigation System ◽  
Angular Rate ◽  
Inertial Navigation ◽  
Calibration Method ◽  
System Level ◽  
Measurement Unit ◽  
Self Calibration ◽  
Rotation Axes ◽  
Rotation Scheme

In a dual-axis rotational inertial navigation system (RINS), there are two kinds of installation errors, nonorthogonal installation errors of inertial sensors, and installation errors between the inertial measurement unit (IMU) and rotation axes. Traditionally, these two errors are not considered simultaneously. Thus, they are calibrated separately by different estimation algorithms and rotation schemes. In this paper, a system-level self-calibration method for installation errors of a dual-axis RINS is proposed. Based on the Kalman filter, the measurement model is reestablished to ensure that all installation errors can be estimated together. First, the relationship between the initial attitude and subsequent attitude of IMU during rotation is used as a constraint to estimate nonorthogonal installation errors of accelerometers, and installation errors between the IMU and rotation axes. Then, the angular rate of the rotation mechanism is used as a reference to estimate nonorthogonal installation errors of the gyros. The rotation scheme of the IMU is designed to make all installation errors observable, and the observability of the system is analyzed based on the piecewise constant system method. Simulation and laboratory experiment results suggest that installation errors can be effectively estimated by the proposed method, thereby avoiding the complex separating process.

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