1. SMHI Automatic meteorological station network Mallversion 1.0 2009-09-23

2. SMHI Automatic meteorological station network 2 2015-10-16

3. SMHI Automatic meteorological station network 3 2015-10-16 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

4. SMHI Automatic meteorological station network 4 2015-10-16 SMHI AWS 1 Anemometer, Wind Vane and mast 2 Sensors for Relative Air Humidity and Air Temperature 3 Ceilometer 4 Sensor for Accumulated Precipitation 5 Sensor for Visbility, Present Weather and precipitation intensity 6 Automatic Weather Station (AWS) Logger cabinet 7 Power Distribution Central

5. SMHI Automatic meteorological station network 5 2015-10-16 Stora Sjöfallet (67°30’N, 18°18’E, 425möh)

6. SMHI Automatic meteorological station network 6 2015-10-16 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.

7. SMHI Automatic meteorological station network 7 2015-10-16 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.

8. SMHI Automatic meteorological station network 8 2015-10-16 This is what we are testing since fall 2012

9. SMHI Automatic meteorological station network 9 2015-10-16 The real thing

10. SMHI Automatic meteorological station network 10 2015-10-16 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.”

11. SMHI Automatic meteorological station network 11 2015-10-16 Our intension is to test this system with all the sensors we normally use at our AWS.

12. SMHI Automatic meteorological station network 12 2015-10-16 Next step maybe. To add a logger to get some redundancy.

13. SMHI Automatic meteorological station network 13 2015-10-16 We have built a simple monitoring system in Lab View (National instruments)

14. SMHI Automatic meteorological station network 14 2015-10-16 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? -?

15. SMHI Automatic meteorological station network 15 2015-10-16 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!