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제1장 서론 7

제2장 자료 및 방법 8

2.1. 자료 8

2.1.1. 위성 관측 자료 8

2.1.2. 이중편파레이더 관측 자료 11

2.2. 개선 알고리즘 11

2.3. 검증 방법 15

제3장 결과 16

3.1. 비기상 에코 특성 분석 16

3.1.1. 파랑에코(Sea Clutter) 16

3.1.2. 채프에코(Chaff echo) 17

3.1.3. 이상전파에코(Anomalous propagation) 19

3.2. 사례별 검증 20

3.3. 계절별 검증 26

3.3.1. 봄·가을철 사례 분석 26

3.3.2. 여름철 사례 분석 40

3.3.3. 겨울철 사례 분석 47

제4장 요약 및 향후 계획 55

참고문헌 56

부록 : 개선 알고리즘 실행 코드(sat_qc.c) 57

List of Tables

Table 2.1. The cloud amount and type analysis data using CA and CT categorization... 8

Table 3.1. The number of seasonal AP observation days in 2015 19

Table 3.2. List of meteorological and non-meteorological echo observation cases in 2015 21

Table 3.3. Total false alarm ratios for non-meteorological echo observation cases based... 23

Table 3.4. Total false alarm ratios for non-meteorological echo observation cases based... 23

Table 3.5. Evaluation scores for meteorological echo observation cases based on NoQc,... 24

Table 3.6. Evaluation scores for meteorological echo observation cases based on NoQc,... 25

List of Figures

Fig. 2.1. Precipitation probability distribution comparing AWS rainfall data between cloud... 10

Fig. 2.2. Precipitation probability distribution comparing AWS rainfall data between cloud... 10

Fig. 2.3. Flowchart of the new non-meteorological echo removal algorithm 12

Fig. 2.4. Case study of the new non-meteorological echo removal algorithm at 18:00 KST on... 14

Fig. 3.1. Example of Sea clutter case 16

Fig. 3.2. The number of monthly and seasonal sea clutter observation days in 2015 17

Fig. 3.3. The number of monthly and seasonal chaff observation days in 2015 18

Fig. 3.4. The hourly chaff observation frequency distribution in 2015 18

Fig. 3.5. The hourly AP observation frequency distribution in 2015 19

Fig. 3.6. The hourly and seasonal AP observation frequency distribution in 2015 20

Fig. 3.7. Case study of the new non-meteorological echo removal algorithm at 20:15 KST... 28

Fig. 3.8. Same as Fig. 3.7 except for 15:00 KST on 15 Apr 2015 and PPI0 radar... 29

Fig. 3.9. Same as Fig. 3.7 except for 15:00 KST on 15 Apr 2015 30

Fig. 3.10. Case study of the new non-meteorological echo removal algorithm at 16:00 KST... 32

Fig. 3.11. Same as Fig. 3.10 except for 16:00 KST on 16 Apr 2015 and CAPPI 1.5km... 33

Fig. 3.12. Same as Fig. 3.10 except for 19:00 KST on 12 May 2015 35

Fig. 3.13. Same as Fig. 3.10 except for 19:00 KST on 12 May 2015 and CAPPI 1.5km... 36

Fig. 3.14. Same as Fig. 3.10 except for 21:00 KST on 11 Oct. 2015 38

Fig. 3.15. Same as Fig. 3.10 except for 21:00 KST on 11 Oct. 2015 and CAPPI 1.5km... 39

Fig. 3.16. Same as Fig. 3.10 except for 21:00 KST on 24 Jun 2015 and CAPPI 1.5km... 41

Fig. 3.17. Same as Fig. 3.10 except for 16:00 KST on 15 Jul 2015 and CAPPI 1.5km radar... 42

Fig. 3.18. Same as Fig. 3.10 except for 13:00 KST on 13 Jul 2015 43

Fig. 3.19. Same as Fig. 3.10 except for 13:00 KST on 13 Jul 2015 and CAPPI 1.5km radar... 44

Fig. 3.20. Same as Fig. 3.10 except for 18:00 KST on 22 Jul 2015 and CAPPI 1.5km radar... 46

Fig. 3.21. Same as Fig. 3.7 except for 03:00 KST on 3 Jan 2015 and PPI0 radar... 48

Fig. 3.22. Same as Fig. 3.7 except for 17:00 KST on 22 Jan 2015 and PPI0 radar... 49

Fig. 3.23. Same as Fig. 3.10 except for 18:00 KST on 26 Nov 2015 50

Fig. 3.24. Same as Fig. 3.10 except for 18:00 KST on 26 Nov 2015 51

Fig. 3.25. Same as Fig. 3.10 except for 1500 KST on 3 Dec 2015 53

Fig. 3.26. Same as Fig. 3.10 except for 1500 KST on 3 Dec 2015 and CAPPI 1.5km radar... 54

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