smhi automatic meteorological station network mallversion 1.0 2009-09-23
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SMHI Automatic meteorological station network
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General info 138
Collected 1/hour by SMHI’s Data Acquisition System NEMO
Communication – PSTN (public switched telephone network), Wireless - Telematik M2M (machine to machine), GSM.
Powered from the grid by 230 V
2 stations powered by solar cells and wind generator (Utklippan, Östergarnsholm)
Log memory 1-3 months
Service - mountain and coast stations every year, all others every second year
Local maintenance person
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SMHI AWS
1 Anemometer, Wind Vane and mast 2 Sensors for Relative Air Humidity and Air Temperature3 Ceilometer4 Sensor for Accumulated Precipitation5 Sensor for Visbility, Present Weather and precipitation intensity6 Automatic Weather Station (AWS) Logger cabinet7 Power Distribution Central
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Stora Sjöfallet (67°30’N, 18°18’E, 425möh)
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• Since Vaisala has stopped producing the Milos system we need to replace our Milos stations.
• We plan to keep all the existing sensors.
• We need to replace the data logger and communication.
• We want to build a system with modular “off-the-shelf” equipment to avoid being in the hands of one supplier, and to have a more flexible system.
• We want to start with IP communication so that we can start using web -cameras etc.
• We wish to find some back up communication system.
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• Our data users wishes for more frequent data acquisition, e.g. every 5-10 minutes.
• We want to transfer more raw data directly to SMHI but still have some kind of data logging at the station in case of communication failure.
• In the future we might use “intelligent” sensors with built-in-communication as stand alone parameters for a more flexible network.
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This is what we are testing since fall 2012
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The real thing
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ICP CON
Modules for communication converting, analog or digital inputs/outputs etc.
fit-PC2i
“fit-PC2 is a miniature fanless PC based on Atom CPU. It is extremely small and extremely energy efficient, but still packs the full set of PC features.”
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Our intension is to test this system with all the sensors we normally use at our AWS.
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Next step maybe. To add a logger to get some redundancy.
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We have built a simple monitoring system in Lab View (National instruments)
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Benefits and disadvantages
+ We will get a more flexible system.+ We can choose devices with a certain function from several suppliers.+ Cheaper to purchase?+ ?
-We need more knowledge about linux programming, ip communication etc “in-house”. Resource consuming.-Incompatible devices?-Risk of getting many different versions of equipment at the stations? Hard to administer?-?
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We wish to get your opinions and experiences of this kind of module built system.
Benefits and disadvantages?
Risks and things to consider?
Thank you!