Experiments and error analysis of laser ranging based on frequency-sweep polarization modulation

Making the sensor rigidly mounted in the target is the common characteristic of conventional navigation system. However, it is difficult or impossible to realize that for special applications such as the positioning of hostile aircraft. A novel new algorithm for target navigation and mapping is designed based on the position, attitude, and ranging information provided by laser distance detector (electronic distance measuring, LDS) and MEMS/GPS navigation, which can solve problem of the target navigation and mapping without any sensor in the target. The detailed error analysis shows that attitude error of MEMS/GPS is the main error source which dominated the accuracy of the algorithm. Based on the error analysis, a calibration algorithm is designed so as to improve the accuracy to a large extent. The result shows that, by using this new algorithm, the performance of target positioning can be efficiently improved, and the positioning error is less than 2 meters for the target within 1 kilometer range.

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Compensation of Frequency Drift in Frequency-Sweep Polarization-Modulation Ranging System

Applied Sciences ◽

10.3390/app9061243 ◽

2019 ◽

Vol 9 (6) ◽

pp. 1243 ◽

Cited By ~ 1

Author(s):

Shuyuan Gao ◽

Rongyi Ji ◽

Yao Li ◽

Chun Liu ◽

Junkai Shi ◽

...

Keyword(s):

Theoretical Analysis ◽

Phase Delay ◽

Experimental Results ◽

Frequency Drift ◽

Polarization Modulation ◽

Frequency Sweep ◽

Thermally Induced ◽

New Approaches ◽

Modulated Waves ◽

The Impact

In frequency-sweep polarization-modulation ranging, distance is determined by the frequency of modulated waves and the corresponding wavelength multiple when emitted and returned waves are in phase. However, measurement of the frequency and the wavelength multiple is affected by thermally induced phase delay of the polarized wave. In this article we systematically discuss the principle of the ranging method and analyze the influences of thermally induced phase delay. New approaches to measurement are proposed to eliminate the impact on frequency and the wavelength multiple. Theoretical analysis and experimental results proved the efficiency and applicability of the methods.

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Earth orientation from lunar laser ranging and an error analysis of polar motion services

Journal of Geophysical Research Atmospheres ◽

10.1029/jb090ib11p09353 ◽

1985 ◽

Vol 90 (B11) ◽

pp. 9353 ◽

Cited By ~ 24

Author(s):

J. O. Dickey ◽

X X Newhall ◽

J. G. Williams

Keyword(s):

Error Analysis ◽

Polar Motion ◽

Laser Ranging ◽

Lunar Laser Ranging ◽

Earth Orientation ◽

Lunar Laser

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Measuring phase retardation of wave plate based on normalized polarization modulation and error analysis

Optik ◽

10.1016/j.ijleo.2017.10.098 ◽

2018 ◽

Vol 157 ◽

pp. 798-803

Author(s):

Jing Liu ◽

Kai You ◽

Qiuling Zhao ◽

Xia Wang

Keyword(s):

Error Analysis ◽

Polarization Modulation ◽

Phase Retardation ◽

Wave Plate

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Analysis of polarization modulation laser ranging principle

2018 IEEE International Conference on Mechatronics and Automation (ICMA) ◽

10.1109/icma.2018.8484644 ◽

2018 ◽

Author(s):

Heng Hu ◽

Xiaoping Du ◽

Changming Zhu ◽

Yishuo Song

Keyword(s):

Laser Ranging ◽

Polarization Modulation

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A Discussion on the measurement and interpretation of changes of strain in the Earth - Potentialities of lunar laser ranging for measuring tectonic motions

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences ◽

10.1098/rsta.1973.0040 ◽

1973 ◽

Vol 274 (1239) ◽

pp. 185-193 ◽

Cited By ~ 8

Keyword(s):

Error Analysis ◽

Numerical Error ◽

Laser Ranging ◽

Lunar Laser Ranging ◽

Error Sources ◽

Error Analyses ◽

The Earth ◽

Lunar Laser

The lunar laser-ranging system at McDonald Observatory, Texas, is currently attaining accuracies of + 15 cm, and + 3 cm appears feasible. Numerical error analyses containing 97 parameters (35 of them for error sources) indicate that the + 3 cm system would measure station motions to + 1 cm/year accuracy within a year for cast—west motions and within about 3 years for north-south. Furthermore, the correlations of station motions with other parameters are low, so that it is unlikely that the estimate is too optimistic because of modelling inadequacies of the error analysis.

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

International Astronomical Union Colloquium ◽

10.1017/s0252921100031407 ◽

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.

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Error Analysis in Neuropsychological Assessment of Verbal Memory and Learning

European Journal of Psychological Assessment ◽

10.1027/1015-5759.11.1.21 ◽

1995 ◽

Vol 11 (1) ◽

pp. 21-28 ◽

Cited By ~ 5

Author(s):

Dietmar Heubrock

Keyword(s):

Error Analysis ◽

Verbal Memory ◽

Verbal Learning ◽

Learning Disorders ◽

Memory And Learning ◽

Auditory Verbal Learning Test ◽

Additional Information ◽

Auditory Verbal Learning ◽

Accurate Picture ◽

Learning Test

Performance on a German version of the Rey Auditory-Verbal Learning Test (AVLT) was investigated for 64 juvenile patients who were subdivided in 6 clinical groups. In addition to standard evaluation of AVLT protocols which is usually confined to items recalled correctly, an error analysis was performed. Differentiating between total errors (TE), repetition errors (RE), and misnamings (ME), substantial differences between clinical groups could be demonstrated. It is argued that error analysis of verbal memory and learning enriches the understanding of neuropsychological syndromes, and provides additional information for diagnostic and clinical use. Thus, it is possible to gain a more accurate picture so that patients can be appropriately retrained, and research into the functional causes of memory and learning disorders can be intensified.

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