From: =?UTF-8?B?Sm9zw6kgU8OhbmNoZXotR2FsbGVnbw==?= Date: Mon, 12 Apr 2021 22:26:18 +0000 Subject: Re: [sloan-25mlog 5477] Re: 2.5m obslog 20210411 (SJD 59316) --000000000000ac39c005bfce00e8 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Audrey, That's interesting. Looking at the code I cannot see how that could have happened. The noBOSS bypass is only looked at before going into the exposure loop, so removing it midway should not have affected the number of exposures taken. It certainly would not have changed the exposure type to "expose" (I cannot find anywhere in the code that sets that expType, I wonder if that's the default value if no expType is passed, which never happens in SOP). My only guess would be that somehow an extra exposure was queued (maybe directly from the APOGEE widget, or from some script) and it started just after the noBOSS ones ended. Thanks, Jos=C3=A9 On Apr 12, 2021 at 11:35:27, Audrey Oravetz wrote: > > > > > > Notes: > > > > > > - We had a weird SOP bug with the NoBOSS bypass enabled. We queued 2 > > > science > > > exposures in twilight. After the second exposure was completed, APOGEE > > > started > > > another 46 read exposure, that was type "expose" instead of type > > > "Object". It's > > > possible that this was causd by removing the NoBOSS bypass before the > > > exposure > > > was completed. > > > > > > It may be somewhat confusing. But even with =C3=A2=E2=82=AC=C5=93noBOSS= =C3=A2=E2=82=AC by pass, number > > of exposures still refers to Boss. So 2 means two Boss exposures, which > > corresponds to 4 Apogee exposures. > > > 2 BOSS exposures with noBOSS bypass were queued with SOP at twilight, > corresponding to 4XA APOGEE exposures. This was intended. Another round o= f > 2XA was started after I removed the bypass, which was not intended. The > Count in SOP changed from '1 of 2' to '1 of 1'. There is a chance that > there is a small SOP bug that got the system confused of the count when > the bypass was removed, but a simple stop of the exposure returned SOP to > a ready state for us to proceed with cals and the rest of observing. > Perhaps a small annoyance, but we do not need to discuss at length. Just > so people are aware. > > > > > > > > - There was a dangling ethernet cable in the lower enclosure by the > > > mirror > > > support systems (opposite side from the stairway). It was not dangling > > > in the > > > afternoon. > > > > > > - We took two extended APOGEE dome flats, although we slewed to 121, 50 > > > before > > > taking them > > > > Thanks for taking them. Yes, it is preferred to take these extended dome > > flat in the field. So, we can take the regular dome flat with =C3=A2=E2= =82=AC=C5=93Do Apogee > > Dome flat=C3=A2=E2=82=AC , instead of =C3=A2=E2=82=AC=C5=93Goto GangChang= e=C3=A2=E2=82=AC on the last cartridge of a > > night. Take two extended dome flat after the regular one, then slew to th= e > > Stow position to switch the gang connector position, prepare for the > > close. > > ______________________________________ > > > Just for clarification and educational purposes, there is no difference i= f > we take dome flats at the field or at any telescope orientation. What > matters is if the gang connector is removed before they are done. Maybe i= t > is wise to keep the telescope at the field to prevent any confusion from > the cold observer's perspective. I will do this next time. > > Audrey > > > > ______________________ > > Logs of Nightly APO Activities > > https://trac.sdss.org/tracmailman/browser/private/sloan-25mlog/index.html > > > > > ____________________________________________________________ > Logs of Nightly APO Activities > https://trac.sdss.org/tracmailman/browser/private/sloan-25mlog/index.html > --000000000000ac39c005bfce00e8 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Audrey,That= 's interesting. Looking at the code I cannot see how that could have ha= ppened. The noBOSS bypass is only looked at before going into the exposure = loop, so removing it midway should not have affected the number of exposure= s taken. It certainly would not have changed the exposure type to "exp= ose" (I cannot find anywhere in the code that sets that expType, I won= der if that's the default value if no expType is passed, which never ha= ppens in SOP). My only guess would be that somehow an extra exposure was qu= eued (maybe directly from the APOGEE widget, or from some script) and it st= arted just after the noBOSS ones ended.Tha= nks,Jos=C3=A9 On Apr 12, 2021 at= 11:35:27, Audrey Oravetz wrote: =20 >> Notes:>= > - We had a weird= SOP bug with the NoBOSS bypass enabled. We queued 2> science> exposures in twilight. After the second exposure= was completed, APOGEE> started> ano= ther 46 read exposure, that was type "expose" instead of type= > "Object". = It's> possible= that this was causd by removing the NoBOSS bypass before the> exposure> was completed.> It may = be somewhat confusing. But even with =C3=A2=E2=82=AC=C5=93noBOSS=C3=A2=E2= =82=AC =C2=A0by pass, number of exposures still refers to Boss. So 2 means two Boss exposures, w= hich corresponds to 4= Apogee exposures.2 BOSS exposures with noBOSS bypass = were queued with SOP at twilight,corresponding to 4XA APOGEE exposures.= This was intended. Another round of2XA was started after I removed the= bypass, which was not intended. TheCount in SOP changed from '1 of= 2' to '1 of 1'. There is a chance thatthere is a small SOP= bug that got the system confused of the count whenthe bypass was remov= ed, but a simple stop of the exposure returned SOP toa ready state for = us to proceed with cals and the rest of observing.Perhaps a small annoy= ance, but we do not need to discuss at length. Justso people are aware.= >> - There was a dangling ethernet cable in the lower enclosur= e by the> mirror> support systems (o= pposite side from the stairway). It was not dangling> in the> afternoon.>&g= t; - We took two extended APOGEE dome flats, although we slewed to 121, 50> before> taking them Tha= nks for taking them. Yes, it is preferred to take these extended dome flat in the field. So, we = can take the regular dome flat with =C3=A2=E2=82=AC=C5=93Do Apogee Dome flat=C3=A2=E2=82=AC , in= stead of =C3=A2=E2=82=AC=C5=93Goto GangChange=C3=A2=E2=82=AC =C2=A0on the l= ast cartridge of a ni= ght. Take two extended dome flat after the regular one, then slew to the Stow position to switch= the gang connector position, prepare for the close. ______________________________________Just = for clarification and educational purposes, there is no difference ifwe= take dome flats at the field or at any telescope orientation. Whatmatt= ers is if the gang connector is removed before they are done. Maybe iti= s wise to keep the telescope at the field to prevent any confusion from= the cold observer's perspective. I will do this next time.Audre= y______________________ Logs of Nightly APO Activities https://trac.sdss.org/tracmailman/browser/priva= te/sloan-25mlog/index.html_________________________________________= ___________________Logs of Nightly APO Activities https:/= /trac.sdss.org/tracmailman/browser/private/sloan-25mlog/index.html =20 --000000000000ac39c005bfce00e8--