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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"?

stop

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 and the shifter has time to think.

reschedule

In case it seems possible to observe another source, because e.g. another source is less obscured by clouds, the shifter is of course free to try that.

Also sometimes SpecialMeasurements can be done.

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. And integral filter would maybe do, it converts "significantly" or "regularly" into a similar answer depending on the time constant of course.