Altimetry Method for an Interferometric Radar Altimeter Based on a Phase Quality Evaluation
A radar altimeter (RA) is useful to improve autonomous functions such as landing guidance or navigation control of an aircraft. To ensure more precise and safer flights by aircraft, an interferometric RA (IRA) capable of measuring the angle of a target is required. However, the phase-comparison mono...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/12/5508 |
| _version_ | 1797592724790050816 |
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| author | Jong-Soo Ha Sung-Yong Hong |
| author_facet | Jong-Soo Ha Sung-Yong Hong |
| author_sort | Jong-Soo Ha |
| collection | DOAJ |
| description | A radar altimeter (RA) is useful to improve autonomous functions such as landing guidance or navigation control of an aircraft. To ensure more precise and safer flights by aircraft, an interferometric RA (IRA) capable of measuring the angle of a target is required. However, the phase-comparison monopulse (PCM) technique used in IRAs has a problem in that an angular ambiguity arises with respect to a target with multiple reflection points, such as terrain. In this paper, we propose an altimetry method for IRAs that reduces the angular ambiguity by evaluating the quality of the phase. The altimetry method as introduced here is sequentially described based on synthetic aperture radar, a delay/Doppler radar altimeter, and PCM techniques. Finally, a phase quality evaluation method is proposed for use in the azimuth estimation process. Aircraft captive flight test results are presented and analyzed, and the validity of the proposed method is examined. |
| first_indexed | 2024-03-11T01:57:13Z |
| format | Article |
| id | doaj.art-956d19036c7741609448cf1f80c4fc22 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T01:57:13Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-956d19036c7741609448cf1f80c4fc222023-11-18T12:32:02ZengMDPI AGSensors1424-82202023-06-012312550810.3390/s23125508Altimetry Method for an Interferometric Radar Altimeter Based on a Phase Quality EvaluationJong-Soo Ha0Sung-Yong Hong1Agency for Defense Development, Yuseong P.O. Box 35, Daejeon 34186, Republic of KoreaDepartment of Radio and Information Communication Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of KoreaA radar altimeter (RA) is useful to improve autonomous functions such as landing guidance or navigation control of an aircraft. To ensure more precise and safer flights by aircraft, an interferometric RA (IRA) capable of measuring the angle of a target is required. However, the phase-comparison monopulse (PCM) technique used in IRAs has a problem in that an angular ambiguity arises with respect to a target with multiple reflection points, such as terrain. In this paper, we propose an altimetry method for IRAs that reduces the angular ambiguity by evaluating the quality of the phase. The altimetry method as introduced here is sequentially described based on synthetic aperture radar, a delay/Doppler radar altimeter, and PCM techniques. Finally, a phase quality evaluation method is proposed for use in the azimuth estimation process. Aircraft captive flight test results are presented and analyzed, and the validity of the proposed method is examined.https://www.mdpi.com/1424-8220/23/12/5508interferometric radar altimetersynthetic aperture radardelay/Doppler radar altimeterphase comparison monopulse techniqueterrain-referenced navigationphase quality evaluation |
| spellingShingle | Jong-Soo Ha Sung-Yong Hong Altimetry Method for an Interferometric Radar Altimeter Based on a Phase Quality Evaluation Sensors interferometric radar altimeter synthetic aperture radar delay/Doppler radar altimeter phase comparison monopulse technique terrain-referenced navigation phase quality evaluation |
| title | Altimetry Method for an Interferometric Radar Altimeter Based on a Phase Quality Evaluation |
| title_full | Altimetry Method for an Interferometric Radar Altimeter Based on a Phase Quality Evaluation |
| title_fullStr | Altimetry Method for an Interferometric Radar Altimeter Based on a Phase Quality Evaluation |
| title_full_unstemmed | Altimetry Method for an Interferometric Radar Altimeter Based on a Phase Quality Evaluation |
| title_short | Altimetry Method for an Interferometric Radar Altimeter Based on a Phase Quality Evaluation |
| title_sort | altimetry method for an interferometric radar altimeter based on a phase quality evaluation |
| topic | interferometric radar altimeter synthetic aperture radar delay/Doppler radar altimeter phase comparison monopulse technique terrain-referenced navigation phase quality evaluation |
| url | https://www.mdpi.com/1424-8220/23/12/5508 |
| work_keys_str_mv | AT jongsooha altimetrymethodforaninterferometricradaraltimeterbasedonaphasequalityevaluation AT sungyonghong altimetrymethodforaninterferometricradaraltimeterbasedonaphasequalityevaluation |