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Weather-Observing-Camera-Network WeBoKaN = We tter- B e o bachtungs- Ka mera- N etzwerk. Theodor Mammen, Uwe Wienert (Rainer Bauer, Hardy Pinz, Eckhard Lanzinger et al). Topics: Technology Products Local-Remote Comparison Outlook. TECHNOLOGY. Integration of Standard Components - PowerPoint PPT Presentation
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WeBoKaN DWD 1
German Meteorological Service
Weather-Observing-Camera-Network
WeBoKaN = Wetter-Beobachtungs-Kamera-Netzwerk
Theodor Mammen, Uwe Wienert(Rainer Bauer, Hardy Pinz, Eckhard Lanzinger et al)
WeBoKaN DWD 2
German Meteorological Service
Topics:
• Technology• Products• Local-Remote Comparison• Outlook
WeBoKaN DWD 3
German Meteorological Service
TECHNOLOGY
WeBoKaN DWD 4
German Meteorological Service
DWD-WAN
- video4linux- bttv- convert- mplayer
AFD
TCP/IPNetwork
Surveillance-Camera
Framegrabber-Card
Digital Control Line(RS232-VISCA)
Videoline (SVHS)
JPG-PicturesMPG-Movies
PC
Integration of Standard Components
to a flexible and specialized System
WeBoKaN DWD 6
German Meteorological Service
Outdoor:• Movable Camera• Fixed Camera• Sensors (Temp., Precip. Y/N)• Fountain solution for wiper
Indoor:• PC• Terminalserver• Network• BITE and UPS
WeBoKaN DWD 7
German Meteorological Service
PRODUCTS
WeBoKaN DWD 8
German Meteorological Service
• Panorama: wide angle allows full 360 degrees with 8 shots
Movable Camera• Zoomed target for estimate of visibility
WeBoKaN DWD 9
German Meteorological Service
Picture:• JPG-Header includes
meta data
Movie:• Full PAL- or 1/4 PAL-resolution
WeBoKaN DWD 11
German Meteorological Service
INTER-COMPARISONLOCAL REMOTE
WeBoKaN DWD 12
German Meteorological Service
WeBoKaN DWD 13
German Meteorological Service
Parameter (data availability):• Total Cloud Coverage (>90%)• Horizontal Visibility (>90%)• Present Weather (60%)• State of Ground (10%)
Timeperiod:• September,1st 2003 to August,31 2004
WeBoKaN DWD 14
German Meteorological ServiceEvaluation of total cloud coverage
Time period: 01.09.2003 to 31.08.2004
WEBOKAN-Station: Rostock-Warnemünde Remote Station: Kap-Arkona
WN Total cloud amount from WeBoKaN
0/8 1/8 2/8 3/8 4/8 5/8 6/8 7/8 8/8 9/8 Sum
N 0/8 198 20 3 0 0 0 0 0 0 0 2211/8 52 186 21 2 1 0 0 0 0 1 2632/8 5 105 81 26 4 0 0 0 0 0 2213/8 0 51 130 69 23 7 1 2 0 0 2834/8 0 13 25 57 76 35 7 2 0 0 2155/8 0 6 20 39 107 105 61 11 0 0 3496/8 0 4 11 22 40 128 257 153 8 0 6237/8 0 0 0 7 6 28 111 648 100 3 9038/8 0 0 0 0 0 2 8 165 1157 12 13449/8 0 0 0 0 0 0 0 3 8 31 42
Sum 255 385 291 222 257 305 445 984 1273 47 4464Dif. >
1/85 74 59 70 51 37 16 18 8 4
Dif. in % 1,96% 19,22% 20,27% 31,53% 19,84% 12,13% 3,60% 1,83% 0,63% 8,51%
Sum (all Hits): 4464 2808 or 62,9%
342 4122 or 92,3%
Tota
l Clo
ud a
mou
nt S
YN
OP
ideal Hits
Non-Hits: or 7,7% incl. +/- 1/8:
WeBoKaN DWD 15
German Meteorological Service
Summary of Inter-Comparison:• Cloud Coverage and Visibilty can be well optained• Intensity of precipitation hard to get• Snow Voverage OK, other States of Ground not• Results from different Stations are similar
Summary of Questionnaire:• Forecasters use DWD- and other Internetcameras
– Cloud Coverage and Visibilty (60-80%)– Present Weather from Movies (55%)
WeBoKaN DWD 16
German Meteorological Service
OUTLOOK
WeBoKaN DWD 17
German Meteorological Service
Noise reduction:Original Averaged over 8 pictures
WeBoKaN DWD 18
German Meteorological Service
• Scanning will we optimized• Extend operation to „Low Brightness Condition“• Host based „Exposure“ and Picture Manipulation• Complete „outdoor“ Installation will be tested
• Requests for more Systems (WKN-II)• We apply for Ressources
• Integration into NINJO (DWD Data Display System)
WeBoKaN DWD 19
German Meteorological Service
WeBoKaN DWD 21
German Meteorological Service
Sahara-Dust over Bavaria