Real-time Observation Monitoring and Analysis Network Haihe LIANG, etc. TECO-2008 • The quality guarantee of meteorological observation needs to establish effective management system. – – – – – – – equipment installation compatibility sitting and exposure performance.

Report
Real-time Observation Monitoring
and Analysis Network
Haihe LIANG,
etc.
TECO-2008
• The quality guarantee of meteorological
observation needs to establish effective
management system.
–
–
–
–
–
–
–
equipment installation
compatibility
sitting and exposure
performance monitoring
calibration
maintenance, metadata
real-time quality control
In China, there is a great observation
network used in weather and climate
observation.
•2456 national AWSs
•158 Doppler weather radars
•120 upper-air soundings
•And others
Real-time Observation
Monitoring and Analysis Network
• Meteorological Observation Centre, CMA established monitoring
and analysis system, began to monitor the observation on real-time,
and outputted the analysis products.
– In 2006, the system has began to develop. In 2007, the version 1.o was
finished.
– It includes equipment performance monitoring, data quality monitoring
and maintenance information management
– It is for automatic weather station, upper air sounding system and
Doppler weather radar.
•The operational experiment was
done in 2007 and 2008, and
improved the operation quality
and achieved good benefits.
The system structure
• The system structure has
been designed as “2-level”,
national and provincial
system:
– National system accepts data
from provincial system.
– The provincial system is
responsible for collecting
information.
• 2-level system exchanges
data based on requestservice or real-time.
Software structure
• C/S and B/S models are used
– C/S is taken to data processing, and B/S is for users.
– Data processing uses VC++ and ORACLE to establish C/S
structure for data collecting, processing and evaluating.
– User system adopts J2EE combined with WEBGIS and
ORACLE.
(1) Performance and parameter monitoring
• Performance and parameter monitoring
– parameter, alarm and failure data
• It forms a closed cycle from information
collecting, processing, data statistic and
feedback.
Status and parameter display
Parameter checking
Status in time series
Failure parts analyzing
• Radar status is displayed with weather forecast
• Technician could pay more attention to severe weather
areas
• Before a typhoon arriving, the • It helps to check radar, a
klystron was replaced in
lower power is found at
YANGJIAN radar, so the
2006
technician recover it in time.
Data quality monitoring
• Real-time data quality monitoring checks and analyzes:
–
–
–
–
–
File format
Extremum
Space-time consistency
Environment changes supervision
Reliability indexes
• The data quality monitoring is used to
– Guide the maintenance technicians to find failure in time
– Offer evidences to hardware and software updating for decisionmakers.
– Evaluate data quality.
AWS data quality evaluation
• The data has be
displayed as 4
levels:
–
–
–
–
0:normal
1:usable
2:alarm
3:false
• Based on statistic, it
tell us the ground
temperature has
more problems
错误数量(次)
6000
4000
2000
平均(1681.8)
0
F02
R
E
TMAX
D05
D15
D20
D40
D0MIN
D80
D320
D160
D0MAX
D0
TMIN
D10
TD
T
UMIN
U
FMAX
要素名
Guiding to maintenance
Discontinuous
Invariable Data
Conflicting Data
Inconstant varying
CINRAD Data Quality
• Radar Data Quality Assistance
Efforts
– Hotline Technicians Monitor
Continuously
– Technical Assistance Group
Monitors
– Tools Used
• Unedited National Mosaic
• Radar Reflectivity Comparison
• New algorithms will be developed
for reducing technician watching,
but there are difficulties in autocheck.
Upper air sounding data check
•Upper air WTH are compared with threshold, the abnormal data
is recorded and putted into database, then statistics can be
displayed.
•Technician can pay more attention to the larger number.
Observation information management
• Instruments and parts have IDs
number.
• Observation information
management includes
– Log on duty
– Repair record
– Validity of calibration
– Logistics
– Station environment
pictures and cameras
Observation environment protection
• Station environment
pictures and cameras
– 8-azimuth pictures
– Updated in half-year.
– Video is based on
WEB users.
• It is also used to
observe weather
phenomena.
Evaluation indexes
• There are 3 indexes :
Reliability (R) = T1/T,
Availability (A) = (T1+T2)/T
Failure (F)= (T3+T4)/T
• T is for all time, T1 normal time, T2 usable
time,T3 alarm T4 for failure.
• The radar availability
are 89.49%, 95.3%,
96.2% from June to
August in 2006-2008
新一代天气雷达可用性
95.30%
100.00%
95.00%
96%
96.24%
89.49%
90.00%
85.00%
80.00%
2006年
• AWS alarms and error
is going down
2007年
2008年
美国标准
数据质量错误和异常变化趋势图
20000
15000
10000
5000
0
去年910月
数量 17640
1月
2月
3月
4月
5月
6月
7月
8月
7103
3599
2206
2324
3620
4604
4822
2889
• It is being done:
– GPS/MET, lightning, Profiler, etc, will be monitored.
– QC algorithm will be developed further, for example,
Radar QC, AWS QC,etc.
– Trainning technician.
• After testing the system will be used in most
provinces 2009.
• Based on the statistics some problems are
found, so the software and hardware are being
updated.
THANKS

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