An Implementation of Interferometric Radar Altimeter Simulator

Paek, Inchan; S, Lee; Yoo, Kyungju; Jang, Jong Hun

doi:10.5515/kjkiees.2015.26.1.81

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…The IRA uses pulse compressing to select signals whose Doppler value is zero. In order to obtain the angle of the first returning signal, two or more antennas are placed in the transverse direction of the flight vehicle, and an interferometry method is used [13]. Since the IRA outputs the look angle, unavailable in RA, it is possible to more precisely measure the relative horizontal and vertical positions from the aircraft to the closest point.…”

Section: Comparison Of Trn Based On Ra and Iramentioning

confidence: 99%

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Accurate Measurement Calculation Method for Interferometric Radar Altimeter-Based Terrain Referenced Navigation

Sung

Lee

et al. 2019

Sensors

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In order to improve the performance of Terrain Referenced Navigation (TRN), an Interferometric Radar Altimeter (IRA) has been developed as a more accurate altimeter. The IRA outputs not only the relative distance (slant range, R) but also the cross-track angle (look angle, θ) of the closest point on the zero Doppler line by using the principle of interferometry and two or more antennas. To perform TRN using the IRA, the 3D relative position of the closest point should be calculated. There is a formula to calculate the relative position of the closest point using the Euler angles. However, in an actual flight environment in which the influence of wind exists, the angle of attack, the side slip angle and "the effective look angle" should be used rather than the Euler angles. In this paper, a new formula for calculating the relative position of the closest point is proposed and mathematically derived. The proposed formula was verified with real data from actual flight. The flight test results show that the positions of the closest points calculated using the conventional method and the proposed method are different because of the wind effect. The TRN simulation results indicate that the proposed formula calculates the closest points more accurately than the conventional formula.

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Section: Comparison Of Trn Based On Ra and Iramentioning

confidence: 99%

“…The configuration for the flight test was as follows. The IRA used for the flight test was developed by the Agency for Defense Development and Hanwha Systems as described in Section 1 and Reference [13]. The aircraft used in the test was a King Air 60 model, on which the test fixture was mounted.…”

Section: Performance Evaluationmentioning

confidence: 99%

Accurate Measurement Calculation Method for Interferometric Radar Altimeter-Based Terrain Referenced Navigation

Sung

Lee

et al. 2019

Sensors

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A new method to calculate relative distance of closest terrain point using interferometric radar altimeter output in real flight environment

Sung

Lee

et al. 2018

2018 IEEE/ION Position, Location and Navigation Symposium (PLANS)

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Micro Vibration Measurement in a Latex Sample Mimicking the Tympanic Membrane Using Micro Vibro Tomography

Kwon¹,

Kim²,

Jeon³

et al. 2019

J. Korean Inst. Electromagn. Eng. Sci.

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In this paper, we propose a micro vibro tomography(MVT) method, that can be used to visualize two-dimensional cross-sectional images and micro-vibration tomographic images in real time in a non-contact and non-destructive manner. The proposed method is based on the optical coherence tomography(OCT) technique, with an additionally customized image processing algorithm. The proposed method can detect the micro-motions or vibrations in sample structures by measuring the phase shift variations in the sample structures. In this study, we show the potential capabilities of the proposed MVT system for measuring the micro-vibrations generated when sound waves in a frequency range of 2～5 kHz are applied to an 80-μm thick latex phantom, which mimics the changes in physical structure of the human tympanic membrane while hearing. Additionally, three-dimensional volumetric images of the MVT method were recorded to observe the surface morphological changes in the surface of the phantom sample which mimics the human tympanic membrane while hearing.

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An Implementation of Interferometric Radar Altimeter Simulator

Cited by 3 publications

References 9 publications

Accurate Measurement Calculation Method for Interferometric Radar Altimeter-Based Terrain Referenced Navigation

Accurate Measurement Calculation Method for Interferometric Radar Altimeter-Based Terrain Referenced Navigation

A new method to calculate relative distance of closest terrain point using interferometric radar altimeter output in real flight environment

Micro Vibration Measurement in a Latex Sample Mimicking the Tympanic Membrane Using Micro Vibro Tomography

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