METADATAFILE FOR ICECAM TELEMETRY MAIN CONTACT: JASON BOX, BOX.11@OSU.EDU ------------------------------------------------------- EINGINEERING Alberto Behar --------------------- SITE INFO site ids 1)300034012213870 --> site1@polarmet1.mps.ohio-state.edu 2)300034012216630 --> site2@polarmet1.mps.ohio-state.edu 3)300034012210870 --> site3@polarmet1.mps.ohio-state.edu 4)300034012216080 --> site4@polarmet1.mps.ohio-state.edu 5)300034012611010 --> site5@polarmet1.mps.ohio-state.edu LAST 4 DISCRETE DIGITS: 3870 --> site1 TBD 6630 --> site2 In Repair 0870 --> site3 TBD 6080 --> site4 Kanger 1010 --> site5 Illulisat (Cliff Cam) data can be parsed using the email subject line... Subject: SBD Msg From Unit: 300034012210870 --------------------- DECODE USING PYTHON @polarmet35:/data2/EISCam/telemetry> python Python 2.4.1 (#1, May 16 2005, 15:15:14) [GCC 4.0.0 20050512 (Red Hat 4.0.0-5)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> >>> datatodecode='VDA4OjAwRDAzLzI3QjA4LjVFKzE3LjBJKzE3LjJIMzU=' >>> import base64 >>> datatodecode='VDA4OjAwRDAzLzI3QjA4LjVFKzE3LjBJKzE3LjJIMzU=' >>> data = base64.b64decode(datatodecode) >>> data 'T08:00D03/27B08.5E+17.0I+17.2H35' --------------------- EXAMPLE DATA data are attached in emails sent from sbdservice@sbd.iridium.com to the site email accounts. Two attachments exist. The first attachement includes data similar to what follows... MOMSN: 82 MTMSN: 0 Time of Session (UTC): Thu Mar 22 03:07:05 2007 Session Status: 00 - Transfer OK Message Size (bytes): 32 Unit Location: Lat = 33.842126 Long = -118.420762 CEPradius = 5 THE SECOND ATTACHMENT INCLUDES DATA RESEMBLING THE FOLLOWING SINGLE LINE... T06:10D03/01B10.5E 09.0I 07.8H48 TO DECODE... T06:10 = Time 6:10 am D03/01 = Date March 1 B10.5 = Battery Voltage 10.5V right now I'm reading the boxes own voltage E 09.0 = External Temp 9.0C, space for "-" sign if needed I 07.8 = Internal Temp 7.8C, space for "-" sign if needed H48 = Internal Humidity 48% T16:00D03/21 B08.5E+11.5I+12.7H82 --------------------- HARDWARE TESTING 2 different types tests. One is long term tests. That unit is setup to record once ever two hours and transmits everyday at 12:30pm. So far all goes well with it and the returned data shows that daily temp fluctuations and humidity changes from early morning dew, etc. The second in going through cold testing and here are the results: The unit survives to -50C. At ~ -40C the modem stops sending but the rest of the system keeps working. When the temp comes back to warmer than -40C the modem starts sending again. The external temperature sensor records to -50C (that’s as cold as my freezer can get). The humidity sensor’s temperature sensor works until -40C and then holds at that value even if the temp gets colder. Once it gets warmer than -40C it starts reading out again. Batteries work fine and show a slight decrease in voltage in the colder temps but all within specs (they also show a increase in voltage over nominal in the mid-day sun, again within specs). So in summary, so far so good. --------------------- end HARDWARE TESTING