그림 1. UHF 윈드프로파일러 PCL1300 Fig 1. UHF wind profiler radar PCL1300
그림 2. 이중 첨두 탐지 알고리즘 Fig 2. Bimodal peaks detection algorithm
그림 3. 울진 자동기상관측 시스템에서 측정된 기상 인자. 음영 처리된 영역이 강우 기간이다. Fig 3. Measured meteorological parameters at Uljin AWS. Precipitation durations are indicated by shading area.
그림 4. 울진에서 자동기상관측시스템으로 관측된 (a) 연직 바람과 (b) 신호대잡음비 Fig 4. (a) Vertical wind speed and (b) SNR measured by AWS at Uljin
그림 5. 청천 대기에서 연직 빔으로 수신한 신호의 고도별로 정규화된 도플러 스펙트럼 (a) 원시 자료로부터 산출한 스펙트럼, (b) 제조사의 PCL1300으로 산출한 스펙트럼. 표시 기호 (+)는 최대 첨두를 나타낸다. Fig 5. Normalized doppler spectrum from vertical beam in clear air based on (a) raw data and (b) PCL1300. Cross mark indicates maximum peak with altitude
그림 6. 강우가 있을 때 연직 빔으로 수신한 신호의고도별로 정규화된 도플러 스펙트럼 (a) 원시자료로부터 산출한 스펙트럼, (b) 제조사의PCL1300으로 산출한 스펙트럼. 표시 기호 (+)는최대 첨두를 나타낸다.Fig 6. Normalized doppler spectrum from verticalbeam during rain based on (a) raw data and (b)PCL1300. Cross mark indicates maximum peak withaltitude
그림 7. 이중 첨두 분리 과정 (a) 첨두 탐지 (b) 도플러 스펙트럼 확장 (c) 가우시안 피팅 Fig 7. Bimodal peaks partitioning (a) peak detection (b) extension of doppler spectrum (c) Gaussian fitting
표 1. PCL의 장비 사양 Table 1. Basic specifications for PCL1300
표 2. 원시 자료의 구조와 변수 Table 2. Structure and parameters in raw data
참고문헌
- I. Holleman, H. van Gasteren, and W. Bouten, "Quality assessment of weather radar wind profiles during bird migration," J. of Atmos. Oceanic Technol., vol. 25, no. 12, 2008, pp. 2188-2198. https://doi.org/10.1175/2008JTECHA1067.1
- E. Robert, and Jr. Barbre, "Quality control algorithms for the Kennedy Space Center 50-MHz Doppler radar wind profiler winds database," J. of Atmos. Oceanic Technol., vol 29, no. 12, 2012, pp.1731-1743. https://doi.org/10.1175/JTECH-D-11-00205.1
- P. Kim, K. Kim, B. Campistrom, H. Yoon, and B. Kwon, "UHF and S-band Radar Networks," J. of Korea Institute of Electronic Communication Science, vol. 13, no. 2, 2018, pp. 305-312. https://doi.org/10.13067/JKIECS.2018.13.2.305
- W. Jo, B. Kwon, P. Kim, M. Kim, and H. Yoon, "Quality Control of the UHF Wind Profiler Radar," J. of Korea Institute of Electronic Communication Science, vol. 13, no. 2, 2018, pp. 277-290. https://doi.org/10.13067/JKIECS.2018.13.2.277
- S. Kim, B. Kwon, K. Kim, P. Kim, M. Kim, W. Jo, and H. Yoon, "Case Study on the Mixed Layer Development using the UHF Radio Sounding," J. of Korea Institute of Electronic Communication Science, vol. 13, no. 1, 2018, pp. 253-263. https://doi.org/10.13067/JKIECS.2018.13.1.253
- B. Heo, Wind Profiler and Atmospheric Sounding. Seoul: Hongrung publishing company, 2014.
- K. Kim, M. Kim, S. Seo, P. Kim, D. Kang, and B. Kwon, "Quality evaluation of wind vectors from UHF wind profiler using radiosonde measurements," J. of Environmental Science International, vol. 24, no. 1, 2015, pp. 134-150.
- L. B. Comman, R. K. Goodrich, C. S. Morse, and W. L. Ecklund, "A fuzzy logic method for improved moment estimation from Doppler spectra," J. of Atmos. Oceanic Technol., vol. 15, no. 6, 1998, pp. 1287-1305. https://doi.org/10.1175/1520-0426(1998)015<1287:AFLMFI>2.0.CO;2
- C. S. Morse, R. K. Goodrich, and L. B. Comman, "The NIMA method for improved moment estimation from Doppler radar," J. of Atmos. Oceanic Technol., vol. 19, no. 3, 2002, pp. 274-295. https://doi.org/10.1175/1520-0426-19.3.274
- S. Baek, C. Cho, J. Kim, and H. Song, "Analyses of precipitation cases using wind profiler," Asia-Pacific J. of Atmos. Sci., vol. 41, no. 1, 2005, pp.1-16.
- C. R. Williams, M. Maahn, J. C. Hardin, G. Boer, "Clutter mitigation, multiple peaks, and high-order spectral moments in 35GHz vertically pointing radar velocity spectra," J. of Atmos. Meas. Technol., vol. 11, no. 9, 2018, pp. 4963-4980. https://doi.org/10.5194/amt-11-4963-2018
- A. Savitzky, and M. J. E. Golay, "Smoothing and differentiation of data by simplified least-squares procedures," Analytical Chemistry, vol. 36, no. 8, 1964, pp. 1627-1639. https://doi.org/10.1021/ac60214a047
- K. Wakasugi, S. Fukao, S. Kato, A. Mizutani, and M. Matsuo, "Air and precipitation particle motions within a cold front measured by the MU VHF radar," Radio Science, vol. 20, no. 6, 1985, pp. 1240-1253.
- Meteorological Information Portal Service System_ Disaster Prevention, https://afso.kma.go.kr