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+===== APO 3.5-m Users Committee Meeting, 2/03/2026 =====
+Attending: Nancy Chanover (NMSU), Bill Ketzeback (APO), Misty Bentz (GSU), Anne Verbiscer (UVa), Aleksandr Mosenkov (BYU), Kevin Schlaufman (JHU), Eric Bellm (UW), Jon Holtzman (NMSU), Moire Prescott (NMSU), Chip Kobulnicky (UWy), Michael Hayden (OU), Ben Williams (UW)
+Nancy started by announcing the newest member of the 3.5m observing team: Harrison (Harry) Abbot started his position at APO a few weeks ago. We will introduce him at a later date, although some of you may meet him online (over TUI) in the meantime.
+=== User feedback and comments from institutional representatives ===
+  * JHU - The longitude/latitude/elevation of APO used to be easily findable at the top of the APO home page. This information is important for many users so please add it back in. Nancy agreed and will ensure that this gets done.
+  * NMSU - A user recently reported seeing a higher dark current rate with KOSMOS; the values were elevated from what they saw in November-December after the last repair. This is seen in longish (1200 sec) exposures, although it seems to be present in the Dark frames but not necessarily in the science frames (which leads to an over-subtraction when removing the dark current). The APO staff will take a look at this in more detail and will use this information as they develop the KOSMOS repair schedule.
+  * Oklahoma - nothing to report
+  * Wyoming - nothing to report
+  * Williams - no report
+  * BYU - nothing to report
+  * UVa - nothing to report from users; Anne thanked APO for keeping the legacy website up. We discussed the website later in the agenda.
+  * Georgia State - one user responded to Misty's request for feedback regarding having APO data made available in a public archive (after a proprietary period). The user said it would be really helpful for them since they are trying to locate historical data taken from APO.
+  * Colorado - no report
+  * Washington - nothing to report
+  * Colgate - no report
+----
+=== Telescope and Instruments Report ===
+The detailed site report is included below, followed by additional information discussed during today's meeting.
+// 3.5-m Telescope and Instruments Highlights, 01/14/26 – 02/02/26 //
+) Overview
+The first half of January was typical wintery weather for APO, with a mix of clouds and 2 inches of fresh, powdery snow that melted within two days. During this same storm, we experienced our coldest weather of the season, down to -12C with winds above the closure limits, making for a couple of very cold nights. The last week of the month, however, Winter Storm Fern, which had affected much of the United States, left the observatory under a blanket of ice and 20+ inches (50 cm) of heavy, wet snow. Utility power to the site was interrupted. APO remained on emergency generator power for a week. Multiple trees were down on utility lines on the way to the observatory (and around the mountain), resulting in more than a dozen power poles damaged or sheared off over a 5-kilometer-long path. It took electric crews a week to replace poles and power lines in difficult terrain and deep snow before electricity was restored to communities along the Sunspot Highway to Timberon. Linemen from several electric companies were contracted to assist in the repairs. Utility power was restored to the Observatory this past Thursday evening (on January 29), but significant snow drifts and ice buildup remained on the 3.5m enclosure over the weekend. Staff have been orienting the enclosure to maximize sun exposure over the weekend to clear the roof.
+We had an on-site documentary filmmaker from the Fisk Planetarium visit during this time period.
+) Operations
+.5m Telescope: The telescope has been performing nominally. We experienced another instance this month of a collimation failure due to software time-outs, when one of the actuators for the secondary mirror did not reach or move to the commanded position. The next move seemed to correct itself. We have identified additional instances of the same error over the past several months, which we are investigating further. The problem is intermittent, making troubleshooting difficult because it cannot be reproduced.
+.5m Telescope: Working as expected. Dcam and UVAcam are both available options for users.
+KOSMOS: System is cold and stable. Instrument is performing nominally.
+ARCTIC: The diffuser rotation mechanism is still unreliable. We have manufactured some new parts, but have not gotten the opportunity to install and test. The mechanism that moves the diffuser in and out of the optical path is still functional in the meantime. The L1 lens was cleaned, and a full vacuum servicing was performed in January. Work was delayed, and some planned tasks were cancelled due to weather conditions.
+SoonerCam: The Agile instrument rotator is still not performing nominally, and we will continue troubleshooting to prepare for SoonerCam. SoonerCam parts are on hand, assembled, and software development has begun. Software development is in the early stages to learn the Hamamatsu and Brandy Wine software APIs.
+ARCES: There was another intermittent failure of the thorium argon lamp power supply, resulting in lamp dropouts or weak lines. Another instance of trouble with the ThAr calibrations was not the lamp power supply, but the calibration flip mirror not moving into place. If identified by an echelle user during their cals, the observing specialists have procedures to identify which is occurring and adjust the power supply or move the mirror by hand. Users are advised to carefully examine their calibration frames.
+DIS: System is powered down and warm. Decommissioning plans have begun. The instrument has been decabled, and we will be lowering it off the observing floor soon.
+NICFPS: System is cooled and usable.
+TripleSpec: System is cooled and usable.
+APOLLO: The instrument is usable for laser ranging. Maintaining the instrument's temperature during extreme environmental conditions remains challenging. The team has experienced a streak of poor weather and software connection issues over the past month.
+----
+=== Additional site, telescope and instruments discussion ===
+The recent winter storm that affected a large swath of the US dumped heavy rain for 6-8 hours, which then froze, followed by about 2 feet of snow. Trees were weighted down by frozen ice and snow, which led to a number of downed limbs, trees, and power poles. The site lost power and was on generator power for about a week. Fortunately, the generator worked as expected throughout the entire week. We are now open and can observe again as of last night (Monday February 2).
+There was a documentary filmmaker on site for an SDSS planetarium presentation.
+There was a telescope issue (described above); we are still trying to determine if it is a hardware or software issue.
+Yesterday we learned of the recent elevated dark current for KOSMOS (see above), which we will investigate ASAP.
+A servicing of ARCTIC was completed last month, including cleaning the L1 lens and vacuum servicing. Additional planned work on the diffuser rotation mechanism was halted because of the bad weather. Those potential upgrades are still in the works.
+The early software development for SoonerCam is still ongoing.
+We are still having issues with the ARCES ThAr lamps; users should carefully examine their calibration frames and report any unusual behavior to the observing specialist. The ThAr and possibly quartz frames will be blank or have very low signal when things are not functioning correctly.There are two failure modes and the obs-specs know how to identify each one and what to do to remedy it.
+There are no current issues with TripleSpec and NICFPS. The DIS and Agile decommissioning is still ongoing. APOLLO has been having some thermal issues due to the cold weather, which we are continuing to troubleshoot.
+There is an open position for a mechanical engineer to join the 3.5m engineering group. This is at a more junior level than the Chief Telescope Engineer position that was advertised previously. Please share this advertisement with any qualified candidates! [[https://careers.nmsu.edu/jobs/mechanical-engineer-remote-locations-new-mexico-united-states]]
+----
+=== 2026 Q1 3.5m scheduling ===
+The Q1 schedule is posted. It is pretty full at this point, although there is an available B half (DD01) on February 11. Users interested in requesting this time should send the request (including a program ID if the project already has been assigned time this quarter, otherwise a short proposal) to Ben, Nancy, Russet, Amanda, and their institutional schedulers.
+----
+=== 2026 Q2 3.5 scheduling ===
+The allocations were sent out to institutional schedulers last night. Proposals are due on February 24. We are aware of one class group that plans to visit APO during Q2 but if there are others who have not yet notified us please do so ASAP.
+----
+=== 2026 Q1 0.5 scheduling ===
+The ARCSAT Q1 schedule is posted; there is one open week remaining at the end of the quarter.
+----
+=== Wiki discussion ===
+Jon Holtzman led a discussion of the APO wiki (http://astronomy.nmsu.edu/apo-wiki/doku.php?id=start), which he has been cleaning up recently. While the instrument manuals on the APO website are fine for learning basic properties and operational procedures of the instruments, information about "features" or "issues" for each instrument (e.g those related to data processing or tricks/tips for observing in a very specific mode) are not held in a common repository despite the vast experience spread around the ARC user community. This would be particularly useful for new users, students, etc. The user wiki was designed for this, but it has been fairly stagnant lately. Jon is leading an effort to revitalize the wiki and populate it with things that users should be aware of and provide some descriptions of reduction issues and software options. Therefore Jon is trying to collect 1) a list of features/issues for each instrument, provided by users, and 2) a list of the software options for data reduction for each instrument (no judgment here - truly, what are people using?). He needs help populating these two sections for each instrument! If you have and information regarding either of these items, please email it to Jon Holtzman (holtz@nmsu.edu) so he can add it to the wiki. This will ultimately help all users achieve the pest possible performance from the 3.5m facility instruments for their science.
+----
+=== PypeIt discussion ===
+Jon Holtzman is also working on incorporating modules into PypeIt for reducing spectra from 3.5m instruments. PypeIt is designed primarily for data from slit spectrographs, and we have received funding as part of an NSF award to develop a PypeIt implementation for KOSMOS, ARCES, and TripleSpec. Initial modules have been created for all three instrument; ARCES is challenging because of its short slit, but the versions for KOSMOS and TripleSpec are nearing usability for testing. The PypeIt group does an excellent job in version controlling their software; in order for a new module to be incorporated into the overall distribution version, new modules need to be supplied with test data so that any time modifications are made to the code base they can be applied to the test data. In order to move us closer towards being able to implement the new APO-specific modules, we are looking for users in the ARC community that have familiarity w/PypeIt for non-APO instruments and are willing to test out our development modules. There are lots of parameters that can be tuned, and we're looking for people who have experience in doing so. UC reps: please query your users and have them contact Jon if they are willing to help with this.
+----
+=== Status of new instrument initiatives ===
+  * SoonerCam: See above site report and subsequent discussion.
+  * KOSMOS grisms: We received a number of useful responses to the recent survey - THANK YOU! The low-res grism is the highest priority for a significant majority of the respondents so we will move forward with purchasing that grism immediately as we continue to seek funds for the purchase of additional grisms.
+  * ASPEN: No major updates this month. We still plan to hold the Preliminary Design Review in Q2 2026.
+  * Ocotillo: No major updates this month. The TEG will be hiring an engineer/technician at the BS/MS level very soon; interested parties should look for the job ad on the UW hiring site shortly.
+----
+=== Website update ===
+Nancy stated that we'd like to understand what users are not able to find/do on the new website in an effort to encourage users to move to that one. One user suggested getting rid of the drop-down menus on the front page and restoring all the links to the front page. Or at minimum, reducing the number of clicks that it takes to reach specific information. Another user mentioned that there are no Exposure Time Calculators for any of the instruments. Bill stated that we have tried for the last 15 years to get ETCs for all instruments but these have not been completed. Another user mentioned that there is no front page that gives an overview of all the instrument. We concluded that an efficient way to address //some// of these issues would be to schedule a hackathon where users could meet in real time with the web development team to discuss and implement suggestions. Nancy and Ben will discuss this further with the IT staff.
+----
+=== ACTION ITEMS ===
+Open action items from previous meetings:
+  * Joanne Hughes: put the KOSMOS MOS data reduction software on the wiki. Joanne is waiting for an update from her colleagues at the College of Idaho. Update: Jon Holtzman put a link to the College of Idaho software on the wiki, and notes that this is a wrapper for lower level reduction stuff in pyVista. Additional descriptive text/examples would still be welcome and good. Status: CLOSED
+  * UC reps: remind your users to review the Q1 schedule and request OPEN/DD01 time if they can make a good case for it. Status: OPEN.
+New action items from this meeting:
+  * UC reps: ask your users to provide instrument usage/data reduction tips and tricks to Jon Holtzman for inclusion on the wiki.
+  * UC reps: ask your users if they have experience using PypeIt with non-APO instruments; if so please contact Jon.
+  * Nancy: ensure that observatory lat/long/elevation gets put back on new APO home page.
+  * Nancy: explore web page hackathon idea with APO webdev team.
+----
+=== All Other Business ===
+None.
+----
+=== Next Meeting ===
+The next Users Committee meeting will be on Tuesday March 03 at 10:30 MST.
+----
 ===== APO 3.5-m Users Committee Meeting, 1/13/2026 =====
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