From: =?UTF-8?B?Sm9zw6kgU8OhbmNoZXotR2FsbGVnbw==?= Date: Wed, 2 May 2018 18:53:57 -0400 Subject: Re: [sloan-25mlog 4055] Re: 2.5m obslog 20180501 (SJD 58240) --94eb2c058d6849499f056b40f695 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Kaike, Yes, that=E2=80=99s true. Ok, let=E2=80=99s use v3_7 tonight. I=E2=80=99ll = tag 3.8.1 with the fix to centre up but *without* the slow-ish offsets tomorrow. Then we can try the computed offsets again next eng run once Conor has reduced the SlewAdvTime. Cheers, Jos=C3=A9 -- Jos=C3=A9 S=C3=A1nchez-Gallego Research Associate Astronomy Department University of Washington On May 2, 2018 at 23:21:38, Kaike Pan (kpan@apo.nmsu.edu) wrote: The comparison is between v3_7 and v3_8dev. I don=E2=80=99t know how v3_7 a= nd v3_8.0 compare each other. But from my previous experience, they seems guide equally well. Yes, we can use v3_8.0 if you prefer (But I thought I have the center-up issue with v3_8.0, do we?). -Kaike > On May 2, 2018, at 4:11 PM, Jos=C3=A9 S=C3=A1nchez-Gallego wrote: > > Hi Renbin, Kaike, all, > > Sorry for chiming in late. With =E2=80=9Cold=E2=80=9D guider are we talki= ng about v3_7 (the old old fitting code) or 3.8.0 (the one with the new fitting code but without the slow slews)? > > Unless there is a good reason to doubt the new fitting code I=E2=80=99d p= refer to keep using 3.8.0 now that the pointing model has improved. > > Cheers, > > Jos=C3=A9 > > On May 2, 2018, 21:34 +0200, Renbin Yan , wrote: >> Hi Kaike, >> >> Let's use the old guider for MaNGA this run. >> >> best, >> -renbin >> >> On Wed, May 2, 2018 at 2:33 PM, Kaike Pan wrote: >>> Considering that v3_8dev updates slower (even after reduce the SlewAdvTime), has higher correction oscillations, >>> that MaNGA requires better guiding, and that we are not in engineering time, Renbin and/or other MaNGA team need >>> to decide which version of guider they want to use for the coming dark run. If they decide to use the old tested version, >>> let=E2=80=99s work on the guider code, and test the new version in comi= ng engineering run. >>> >>> -Kaike >>> >>> >>>> On May 2, 2018, at 12:07 PM, Conor Sayres wrote: >>>> >>>> v3_8dev uses computed offsets, which behave like slews. Computed offsets are how we should be guiding... >>>> >>>> I would like to try continue using v3_8dev, but reduce the SlewAdvTime from 3.5 to 1.5 seconds in the TCC=E2=80=99s tune block. I think this will = speed up the guide loop significantly. >>>> >>>> If you notice a high amount of out of closed loop instances, then I think change SlewAdvTime back to 3.5 seconds, and run v3_8 (rather than v3_7). >>>> >>>> In the coming weeks I=E2=80=99m going to be modifying the TCC to perfo= rm all guide offsets (ra/dec rotation, mirrors, etc) to run in parallel, this will also speed up the guide loop significantly. >>>> >>>> But ultimately up to you guys. >>>> >>>> >>>> On May 2, 2018, at 10:34 AM, Kaike Pan wrote: >>>> >>>>> For your information, guiding with the old guider v3_7 was at high altitude, between >>>>> 81 to 84.5. If the old version is indeed better (since we only compared two versions >>>>> on one cartridges, the statement is not conclusive), I think that we should use the >>>>> old version for MaNGA, and intend to do so. If MaNGA team, Jose and Conor feel >>>>> that we should use the new one, v3_8dev, please let us know. MaNGA starts tonight. >>>>> >>>>> -Kaike >>>>> >>>>> >>>>> >>>>>> On May 2, 2018, at 5:03 AM, kgrabowski@apo.nmsu.edu wrote: >>>>>> >>>>>> >>>>>> It looks like the older guider corrections oscillate less throughout the >>>>>> plate than the newer one, and may have smaller errors. >>>>>> -------- >>>>>>> >>>>>>> ____________________________________________________________ >>>>>>> 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 >>>>> >>>>> ____________________________________________________________ >>>>> 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.htm= l --94eb2c058d6849499f056b40f695 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable body{font-family:Helvetica,Arial;font-size:13px}= Hi Kaike,Yes, that=E2=80=99s true. Ok, l= et=E2=80=99s use v3_7 tonight. I=E2=80=99ll tag 3.8.1 with the fix to centr= e up but *without* the slow-ish offsets tomorrow. Then we can try the compu= ted offsets again next eng run once Conor has reduced the SlewAdvTime.Cheers,Jos=C3=A9 --Jos=C3=A9 S=C3= =A1nchez-GallegoResearch AssociateAstronomy Departmen= tUniversity of Washington On May 2, 2018 at 23:21:38, Kaike Pan (kpan@apo.nmsu.edu) wrote: The comparison is between v3_7 and v3_8de= v. I don=E2=80=99t know how v3_7 and v3_8.0 compare each other. But from my previous experience, they seems guide equally well. Yes, we can= use v3_8.0 if you prefer (But I thought I have the center-up issue with v3_8.0, do we?). -Kaike > On May 2, 2018, at 4:11 PM, Jos=C3=A9 S=C3=A1nchez-Gallego wrote: > =20 > Hi Renbin, Kaike, all, > =20 > Sorry for chiming in late. With =E2=80=9Cold=E2=80=9D guider are w= e talking about v3_7 (the old old fitting code) or 3.8.0 (the one with the = new fitting code but without the slow slews)? > =20 > Unless there is a good reason to doubt the new fitting code I=E2= =80=99d prefer to keep using 3.8.0 now that the pointing model has improved= . > =20 > Cheers, > =20 > Jos=C3=A9 > =20 > On May 2, 2018, 21:34 +0200, Renbin Yan , wrote: >> Hi Kaike, >> =20 >> Let's use the old guider for MaNGA this run. >> =20 >> best, >> -renbin >> =20 >> On Wed, May 2, 2018 at 2:33 PM, Kaike Pan wrote: >>> Considering that v3_8dev updates slower (even after reduce= the SlewAdvTime), has higher correction oscillations, >>> that MaNGA requires better guiding, and that we are not in= engineering time, Renbin and/or other MaNGA team need >>> to decide which version of guider they want to use for the= coming dark run. If they decide to use the old tested version, >>> let=E2=80=99s work on the guider code, and test the new ve= rsion in coming engineering run. >>> =20 >>> -Kaike >>> =20 >>> =20 >>>> On May 2, 2018, at 12:07 PM, Conor Sayres wrote: >>>> =20 >>>> v3_8dev uses computed offsets, which behave like slews= . Computed offsets are how we should be guiding... >>>> =20 >>>> I would like to try continue using v3_8dev, but reduce= the SlewAdvTime from 3.5 to 1.5 seconds in the TCC=E2=80=99s tune block. I= think this will speed up the guide loop significantly. >>>> =20 >>>> If you notice a high amount of out of closed loop inst= ances, then I think change SlewAdvTime back to 3.5 seconds, and run v3_8 (r= ather than v3_7). >>>> =20 >>>> In the coming weeks I=E2=80=99m going to be modifying = the TCC to perform all guide offsets (ra/dec rotation, mirrors, etc) to run= in parallel, this will also speed up the guide loop significantly. >>>> =20 >>>> But ultimately up to you guys. >>>> =20 >>>> =20 >>>> On May 2, 2018, at 10:34 AM, Kaike Pan wrote: >>>> =20 >>>>> For your information, guiding with the old guider = v3_7 was at high altitude, between >>>>> 81 to 84.5. If the old version is indeed better (s= ince we only compared two versions >>>>> on one cartridges, the statement is not conclusive= ), I think that we should use the >>>>> old version for MaNGA, and intend to do so. If MaN= GA team, Jose and Conor feel >>>>> that we should use the new one, v3_8dev, please le= t us know. MaNGA starts tonight. >>>>> =20 >>>>> -Kaike >>>>> =20 >>>>> =20 >>>>> =20 >>>>>> On May 2, 2018, at 5:03 AM, kgrabowski@apo.nmsu.edu wrote: >>>>>> =20 >>>>>> =20 >>>>>> It looks like the older guider corrections osc= illate less throughout the >>>>>> plate than the newer one, and may have smaller= errors. >>>>>> -------- >>>>>>> =20 >>>>>>> __________________________________________= __________________ >>>>>>> Logs of Nightly APO Activities >>>>>> https://trac.sdss.org/tracmailm= an/browser/private/sloan-25mlog/index.html >>>>>>> =20 >>>>>> ____________________________________________________________ >>>>>> Logs of Nightly APO Activities >>>>> https://trac.sdss.org/tracmailman/b= rowser/private/sloan-25mlog/index.html >>>>> =20 >>>>> __________________________________________________= __________ >>>>> Logs of Nightly APO Activities >>>> https://trac.sdss.org/tracmailman/brows= er/private/sloan-25mlog/index.html >>>> =20 >>> =20 >> ____________________________________________________________ >> Logs of Nightly APO Activities > https://trac.sdss.org/tracmailman/browser/private/s= loan-25mlog/index.html --94eb2c058d6849499f056b40f695--