초록 ▼

1. 목적 : 국내 최초로 집중 호우 및 폭설 등 기상을 관측할 수 있는
고해상도 이중편파 도플러 기상레이더 시스템 개발
2. 주요 연구 성과
2.1 이중편파 기상레이더 설계 제작 기술 개발
이중편파 기상레이더의 상세설계 및 민/군 운영환경을 적용한 국내
최초 도플러 기상 레이더 시스템 설계 개발
2.2 고속 자료 수신을 위한 안테나 및 스케줄링 기술
위성 탑재용 반사판 제작 기술 적용, 송수신 포트별 저손실 고효율
펄스 송수신, 볼륨 관측을 위한 정밀 스케줄 제어/운영 기술 개발
2

1. 목적 : 국내 최초로 집중 호우 및 폭설 등 기상을 관측할 수 있는
고해상도 이중편파 도플러 기상레이더 시스템 개발
2. 주요 연구 성과
2.1 이중편파 기상레이더 설계 제작 기술 개발
이중편파 기상레이더의 상세설계 및 민/군 운영환경을 적용한 국내
최초 도플러 기상 레이더 시스템 설계 개발
2.2 고속 자료 수신을 위한 안테나 및 스케줄링 기술
위성 탑재용 반사판 제작 기술 적용, 송수신 포트별 저손실 고효율
펄스 송수신, 볼륨 관측을 위한 정밀 스케줄 제어/운영 기술 개발
2.3 실시간 이중편파 송신 및 수신 신호처리 기술개발
Coherent형 고정 및 LFM 신호 생성 및 SSPA 200W급 출력과 WDM 광
인터페이스를 통한 2.5Gbps 초고속 디지털 신호처리 기술을 개발
2.4.이중편파 보정 기술개발을 통하여 고품질 레이더 개발
이중편파 도플러 기상 모멘트 산출 기술을 이용한 국내 최초 이중
편파 기상 영상 신호처리 개발
2.5 최적운영 기술개발을 통하여 고품질 레이더 변수 생산
안테나, 송수신 장치의 효율적인 운영/제어 기술을 이용하여 이중
편 기상레이더 최적운영을 통한 고품질 기상 레이더 모멘트 산출
2.6 이중편파 변수를 활용한 기상변수 산출 기술 개발 및 사용자 중심의 자료처리, 표출 기술 개발
이중편파 도플러 기상 모멘트 표출/분석을 위한 3차원 기상레이더
영상 분석 소프트웨어 개발

Abstract ▼

Results
1. The Design and Production X-band Dual Polarization Weather
Radar System
A. Design and Interface of the System
To development of the weather radar system using SSPA 200W level and
high-resolution Dual Polarization Doppler, it is designed and developed that
antenna device,

Results
1. The Design and Production X-band Dual Polarization Weather
Radar System
A. Design and Interface of the System
To development of the weather radar system using SSPA 200W level and
high-resolution Dual Polarization Doppler, it is designed and developed that
antenna device, send-receive device, signal processing device and operating
control/display-analysis device. Through improving system specifications and
operating environment and the developing technologies of optimizing interface
each device.
(1) Design of X-band Weather Radar
X-band dual polarization weather radar has been designed with the features
and specifications of each device to be reflected in the system operating
concept and observation environment for the power of 200W level Solid-state
and high-performance and high-resolution weather observation.
By applying real radar operating environments of commercialization of the
developed radar system and civil/military, environmental specifications were
designed and environmental tests were done.
(2) X-band Weather Radar Integration Test
The integration test was run to verify the performance of the device-specific
performance, and meteorological radar.
B. System design complements and Performance complementary product
design/production
Since the first integrated testing(in Jang-seong) and outdoor operation test, design analysis / review for each device-specific performance improvements
were carried out and the final product was produced to reflect improvements
In addition, in secondary integrated testing(in Hwa-seong) and outdoor operation
test, ongoing verifications and improvements work for software and hardware
was carried out.
2. Development of The Antenna Equipment and Controller
The X-band pulse signals reflected from 2.4m dish reflector are transmitted to
the air and their echo signals reflected from weather target are received by
antenna equipment. The antenna equipment consist of reflector module, transmit
and receive module, pedestal module and antenna controller.
A. Antenna Dish module
Chaparel horn is used in design as primary radiator for antenna equipment.
Chaparel horn has small differences of phase centers within X-band (9.375GHz
± 150MHz) and is easy to alignment.
The primary radiator transmit the signals to the secondary radiator with
-12dB Edge tapered pattern.
Dual polarizer has low loss of reflection and high isolation of polarization using
by rectangular waveguide and matching unit
Feed horn and dual polarizer are designed to have excellent performance of
-25dB return loss and -70dB isolation respectively. -12dB tapered illumination
pattern of primary radiator shows uniform.
The reflector is designed and manufactured to have the specification of 1° and
bellow 3dB beamwidth, sidelobe level 28dB and over , H/V beam width
coincidence 0.02° and below.
B. Transmit and receive isolation module
Transmit and receive module isolate transmit and receive signal, and control
operation mode. This module consist of RF switch, power divider, directional
coupler to monitor strength level of transmit and recive signal.
C. Specification and function of antenna equipment
The measurements of S-parameter, radiation pattern and test of control function
were performed to test and evaluate the performance and function of each module
in antenna equipment for weather radar.
The measurement results show that specification of VSWR 1.5:1 and below,
isolation 20dB and below within frequency of 9.375GHz±150MHz with 300MHz
bandwidth are satisfied.
Radiation patters were measured and gain 44.5dB and over, 1st sidelobe
25dBc and over, Cross polarization level -35dB and below, H/V beam
coincidence 3dB beamwidth (<0.1° in angular average), 10dB beamwidth(<0.3°
in angular average), H/V beam polarization orthogonality of <0.03° and
polarization operation were evaluated.
Antenna equipment operation test performed antenna movement test according
to various control commands. We could evaluate more accurate control performances than designed accuracy 0.1°.
3. Development of transmitter/receiver unit and SSPA
A. Function design of The transmitter/receiver unit
The transmitter/receiver unit generate Coherent type high precision LFM
signal then radiate pulse with SSPA 200W class transmit output then change
from echo receiving signal for weather to 16bit A/D and then provides high
speed digital signal with 2.5Gbps through WDM optic interface
The transmitter/receiver has been designed and produced using PSU, Receiver
module, Transmitter Module, Receiver Front Module, Frequency Synthesis
module, SSPA, Digital Controller module, Key pad & LED and optic WDM
module.
B. The final sample manufacturing of transmitter/receiver unit
After producing prototype, test operating and checking the plan for supplement
final sample, proceed arrangement considering minimize size of case and weight
lightening.
C. Review of the performance supplement and improvement of The transmitter/
receiver Unit
(1) Light weight of Transmitter/receiver Unit
After producing prototype, test operating and checking the plan for supplement
final sample, proceed arrangement considering minimize size of case and weight
lightening.
For convenience of A/S, each assembly has performance improvement and is
produced by list type instead of Tanden type to use removable easily module
with minimal schedule.
(2) Supplement of operation convenience
For convenience of operation test at field, manufactured adding monitoring port
on outside port of each module and the transmitter/receiver unit to measure
easily RF performance, information of inner status using and note book.
(3) supplement of operation safety.
Each module has function of alarm which can be classified as major alarm and
minor alarm and control operation also function of self-protect for The
transmitter/receiver unit has been upgraded using software.
(4) supplement of safety and linearity for LFM signal.
LFM signal means that frequency modulation can be changed linearly
according to time. This is related to compression performance of pulse and may
result in linearity distortion as per growing group delay for each filter.
For supplement this problem, linearity has been improved by changing from IF
SAW Filter of Large group delay to LC BPF.
D. Electrical specification and test report of The transmitter/receiver unit
Electrical specification and test report of Horizontal /Vertical receiver for dual
polarization weather radar performance of The transmitter/receiver unit
4. Signal processing equipment
Signal processing equipment executes the function of computing the weather
moments by using I/Q weather signal and, for this purpose, the signal
processing equipment was designed and manufactured to execute transmission
and reception of high speed optical communication data with transmitter and
receiver, and to execute high speed parallel computational processing of I/Q
signals.
A. Hardware design for the signal processing equipment
Signal processing equipment is composed of the server, Tesla module,
communication control assembly and linkage rack assembly.
B. Software design for the signal processing equipment
Software for the signal processing equipment includes software developed for the
high speed computational processing of I/Q signal processing and algorithm for
the computational processing of various weather moments.
(1) Pulse compression, PPP/FFT mode, computation of weather variable,
thresholding and removal of speckle
(2) Technology for removal of topographic clutter (-40, -50 dB IIR filter)
(3) Technology for spreading of Dual PRF(3kHz:2.4kHz) speed
(4) Reflectivity (  ,   ) < 1 dB
(5) Differential Reflectivity  < 0.2dB
(6) Non-weather echo removal rate > 90%
C. Development of signal processing algorithm for the signal processing equipment
(1) Pulse compression
It utilizes Pulse Compression technology through the utilization of the Short
Pulse LFM waveform and Long Pulse LFM waveform of the signal, and
executes high speed FFT and IFFT computations.
(2) PPP, DFT/FFT mode and removal of clutter
Algorithm for the removal of clutter includes the IIR filter-40dB, -50dB
diminution algorithm designed and developed in the PPP mode.
In the DFT/FFT mode, linear interpolation and Gaussian interpolation can be
applied selectively.
(3) Computation of weather variables and spreading out of radial velocity,
threshold value processing and speckle removal, etc.
Equations for the computation of dual polarization weather signal processing
algorithm such as weather variable computation algorithm and threshold value
processing, etc. were applied and developed for weather signal processing.

목차 Contents

• 표지 ... 1
• 제출문 ... 2
• 보고서 요약서 ... 3
• 연구개발사업 주요 연구성과 ... 4
• 국문 요약문 ... 5
• 영문 요약문 ... 38
• 목차 ... 73
• 그림목차 ... 75
• 표목차 ... 83
• 제1장. 연구개발과제의 개요 ... 85
• 제1절 연구개발 목적 ... 85
• 제2절 연구개발의 필요성 ... 86
• 제3절 연구개발 범위 ... 88
• 제2장. 국내외 기술 개발 현황 ... 92
• 제1절 국내․외 기술 현황 ... 92
• 제3장. 연구 수행 내용 및 성과 ... 97
• 제1절 이중편파 레이더 시스템 설계, integration 및 제작기술 개발 ... 97
• 제2절 고속자료 수신을 위한 안테나 및 스케줄링 기술개발 ... 135
• 제3절 실시간 이중편파 송신 및 수신 신호처리 기술개발 ... 175
• 제4절 이중편파 보정기술 개발을 통한 고품질 레이더 개발 ... 198
• 제5절 최적운영 기술개발을 통해 고품질 레이더 변수 개발 ... 249
• 제6절 이중편파변수를 활용한 기상변수 산출기술개발 및 사용자 중심의 자료처리, 표출기술 개발 ... 268
• 제4장. 목표 달성도 및 관련 분야 기여도 ... 284
• 제1절 목표 달성도 ... 284
• 제2절 관련 분야 기여도 ... 292
• 제5장 연구개발성과의 활용계획 ... 294
• 제1절 기상레이더 시스템 분야 연구개발성과 활용 ... 294
• 제2절 신호처리분야 연구개발성과 활용 ... 298
• 제3절 송수신장치 연구개발성과 활용 ... 299
• 제6장. 연구 과정에서 수집한 해외 과학기술 정보 ... 301
• 제1절 신호처리분야 ... 301
• 7장. 연구개발성과의 보안등급 ... 304
• 제8장. 국가과학기술종합정보시스템에 등록한 연구시설·장비 현황 ... 305
• 제9장. 연구개발과제 수행에 따른 연구실 등의 안전 조치 이행 실적 ... 306
• 제10장. 연구개발과제의 대표적 연구 실적 ... 307
• 제11장. 기타 사항 ... 309
• 제12장. 참고 문헌 ... 310
• 붙임1. 자체 보안관리 진단표 ... 311
• 끝페이지 ... 316