Intro:

    The observatory has 2 weather stations in service (as of nov10):

• The old system (documented in the wind meter  and laser ranging pages)
  
• this includes  a wind meter and a temperature sensor.
• The new system:
• a columbia weather orion weather station.
• This system is documented on this page.

Setup

• Data stored on maestro systemdisk: It is exported as //maestro/MaestroSystemDisk
• In OrionWeatherStationData/oriondata.txt
• See ~phil/doc/windowsMount on how to mount it.
  

Notes:

Rain measurements:

• temp info updated every 15 seconds.
  
• Rain records are sent to micro server from sensor whenever .01 inches of rain has been accumulated.
• After sending rain record, the counters are reset to 0.
• Rainintensity (same as rain rate?) this is a 5minute rolling average.
• The problem is when it stops raining, there are no records sent.
• The 15 second outputs from the micro server keeps the old intensity value. Even though there is no  rain.
• Trouble is:
• rain rate=a Inches/hour
• on Next temp read still A inches/hour.
  
• Can't tell difference between this and no rain on second read unless you look at the accumulated rain value. probably just as easy to use the rain day, value and differentiate it.
• Nice to have rain year. This allows you to differentiate adjacent values and see if matches with accumulated day.
  

Documentation:

Miscellaneous measurements:

04nov10: weekly, monthly, yearly rain accumulations reset

• power dip around 4:48 am. this lasted for about 35 minutes.
• After the power dip, time stamps for data records was no longer spaced by a fixed 15 secs.
• time between records went from about 0 secs to about 3 minutes.
• the jumping around lasted till 12:48. There was a 3 minute dropout and then the time interval between records went back to every 15 seconds.
• the cumulative counters for rain were reset at 12:49 when the records began to be regularly spaced again.
  

• Page 1:
  
• top: time between records.
• The jump at 4:48 lasted for about 35 minutes
• after this the time jumped around from 0 secs to 3 minutes.
• 2nd: rain total for today. This was zero all day since there was no rain.
• bottom: monthly accumulation of rain.
• There was about .78 inches this month.
  
• At 12:48 it jumped back to zero.
• You can see the 35 minutes dropout at 4:48 during the power dip.
• Page 2: blowup around 12:48
• top: time between records.
• Records should have been spaced by 15 seconds. They were being timestamped as low as 2 secs apart and as high as 180 seconds.
• middle: rain today
• bottom: monthly rain accumulation.
• This goes to zero a 12:48.

• time between records became irregular after the power fail.
• the timestamps are put on the record at the micro server so the problem must have been at the sensors or micro server.
• the accumulation totals were reset when the microserver started recording data regularly .

• The timestamp is put on the data  read from the sensors by the microserver.
• If the microserver was busy waiting on a network write, you might think that you could get a time longer than the requested 15 seconds.
• The time should never be < 15 seconds since that is the interval that was requested for recording the data.
• I wonder if the micro server rebooted itself at 12:48?
  

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