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= Observation Limits


|| value || max  || action ||
|| [[http://fact-project.org/smartfact/index.html?sound#fact|median current per pixel in camera]]  || 115 uA || reschedule or stop
|| [[http://fact-project.org/smartfact/index.html?sound#current|maximum current in a single pixel]] ||  160 uA || reschedule or stop
|| [[https://www.fact-project.org/sandbox/AllSkyCloudDetection/ | Clouds]] ||  no stars visible in pointing direction || reschedule or stop
|| [[http://fact-project.org/smartfact/index.html?sound#fact| abs(T_GAPD - T_ambient)]] ||  15° C ||  stop ||
|| [[http://fact-project.org/smartfact/index.html?sound#temperature| T_container]] ||  40° C ||  stop ||
|| [[http://fact-project.org/smartfact/index.html?sound#fact | Wind speed]] ||  50km/h || stop ||
|| Rain ||   ||  stop ||
|| [[http://fact-project.org/cam/index.php | water on mirrors]] ||  || stop ||


== "stop or reschedule"?

 reschedule:: 
   In case it seems possible to observe another source, the shifter should try that.
   Also the SpecialMeasurements should be taken into consideration.

 stop::
  The shifter must stop the normal observation mode, by scheduling the task named `Sleep` 
  on the [[https://www.fact-project.org/schedule/| scheduler page ]] for __right now__. This brings the system into a safe state.






== ToDo

 * Explain how to check currents for alternative sources using smartfact.

 * Apply a filter to the wind speed, in order to convert the condition "significantly or in regular intervals" into a simple yes/no decision. A low pass, or maybe integrator should do fine here.