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Observation Limits

value	max	action
​ Zenith angle	~88°	reschedule
​median current per pixel in camera	115 uA	reschedule or stop
​maximum current in a single pixel	160 uA	reschedule or stop
​ Clouds	no stars visible in pointing direction	reschedule or stop
​ abs(T_GAPD - T_ambient)	15° C	stop
​ T_container	40° C	stop
​ Wind speed	50km/h	stop
Rain		stop
​ 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 ​ 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.