2018-09-26, 04:34 PM
I've been fiddling around with the scheduler, and am noticing something that's got me baffled ...
I've created a project as shown; 60 SNR, "Main extent/ arms" detail, IQ of A, multiple nights exposure ...
... when we look at the project in the Night Bar it looks OK; we have a blue line when it's possible to expose, a red line for the altitude, moon is tucked away, and we have two green bars; the top one we see an IQ B period from 2240 to 2300, an IQ A period from 2300 to 0050, then another IQ B band from 0050 to 0205, finally a "no way" band from 0205 to 0215. In the lower bar we see a short period for setup in red, a period of time from 2305 to 0050 when it's good to expose and a yellow indent bar to indicate what region it's indicating. That's all good ... I specified the minimum project detail as IQ A, multiple nights, cool ... and that's reflected in the top listbox ...
Notice on the bottom listbox it's giving me my filter time starting at 23:05 with 62x1 lights (it's occluded, but that listbox indicates it will be 2% complete toward my SNR 60 goal with this. That makes sense, this is an SQM 19.1 site so I expect a short exposure time to help mitigate the skyfog, integration time of 62m ..
Look at the "Schedule" listbox though ... it shows at 23:02 I slew on over and change my filters and it's scheduling me for 62x1 lights, that's fine ...
If I bring up the "Exposure Calculator" to get a better idea of my signal and sky ADU values the Night Bar looks similar to the main one, and I get three "Exposure Opportunities" which correspond to the three green bands in the main bar; I've selected the middle one for IQ A, cool ...
... but here's where it gets strange; in the "Exposure Opportunities" for that IQ A row it's telling me a duration of 65min (fine, that's pretty close to 62min) but it's saying the ideal exp time is 1sec, when on the main dialog it's calling for 1min (one second is too short anyway unless I'm taking 65 * 60 lights for a total integration time of 65min). Stranger still, in the "Calculate SNR for Exposure" it first set the "total time" edit for 115m and then in the group box it's telling me about 13 exp at 8min, which gives us a total integration time of 114min which matches the time of 115m it put into the edit box.
If I manually adjust the 115m that it put there to the 65min that the main dialog and the "Exposure Opportunities" listbox row call for then the text numbers get closer ... but am I doing something wrong that's causing these effects in the first place?
Thx!
I've created a project as shown; 60 SNR, "Main extent/ arms" detail, IQ of A, multiple nights exposure ...
... when we look at the project in the Night Bar it looks OK; we have a blue line when it's possible to expose, a red line for the altitude, moon is tucked away, and we have two green bars; the top one we see an IQ B period from 2240 to 2300, an IQ A period from 2300 to 0050, then another IQ B band from 0050 to 0205, finally a "no way" band from 0205 to 0215. In the lower bar we see a short period for setup in red, a period of time from 2305 to 0050 when it's good to expose and a yellow indent bar to indicate what region it's indicating. That's all good ... I specified the minimum project detail as IQ A, multiple nights, cool ... and that's reflected in the top listbox ...
Notice on the bottom listbox it's giving me my filter time starting at 23:05 with 62x1 lights (it's occluded, but that listbox indicates it will be 2% complete toward my SNR 60 goal with this. That makes sense, this is an SQM 19.1 site so I expect a short exposure time to help mitigate the skyfog, integration time of 62m ..
Look at the "Schedule" listbox though ... it shows at 23:02 I slew on over and change my filters and it's scheduling me for 62x1 lights, that's fine ...
If I bring up the "Exposure Calculator" to get a better idea of my signal and sky ADU values the Night Bar looks similar to the main one, and I get three "Exposure Opportunities" which correspond to the three green bands in the main bar; I've selected the middle one for IQ A, cool ...
... but here's where it gets strange; in the "Exposure Opportunities" for that IQ A row it's telling me a duration of 65min (fine, that's pretty close to 62min) but it's saying the ideal exp time is 1sec, when on the main dialog it's calling for 1min (one second is too short anyway unless I'm taking 65 * 60 lights for a total integration time of 65min). Stranger still, in the "Calculate SNR for Exposure" it first set the "total time" edit for 115m and then in the group box it's telling me about 13 exp at 8min, which gives us a total integration time of 114min which matches the time of 115m it put into the edit box.
If I manually adjust the 115m that it put there to the 65min that the main dialog and the "Exposure Opportunities" listbox row call for then the text numbers get closer ... but am I doing something wrong that's causing these effects in the first place?
Thx!