### OBSDATE ### 20120324 ### LOGDATE ### 120324 ### OBSERVERS ### BAW (at home) ### WEATHER ### Clear ### LOCATION ### REMOTE ### PROGRAM ### I thought I might get some quick pointing data if I could and test a new model for N1. ### SIDEROSTATS ### n1 s2 ### TARGETS ### None ### QUALITY ### Quite bad (no/almost no useful data ### PROBLEMS ### 1. Power outage two or three days ago? Siderostat UPS is clearly not working yet and so the ppp connections to the siderostats had to be restarted. Interestingly, it seems that the ark system clocks had drifted by 10, 9, and 6 seconds for the three I checked (and fixed). NTP will eventually correct this, but they had only just been reconnected to the network when I started. This would be an easy thing to miss and small clock errors like this might explain some of the excess residuals in my best pointing model for N1. 2. On the last trip, I did an update on argus. Annoyingly, it included a new kernel. I had thought that I fixed it so it would boot the old kernel, but Fedora 16 uses grub2 and apparently, I did it wrong. When I found out about this after a power outage last week, I again tried to fix it to boot the old kernel, and it failed to boot (you may recall an "argus is down" email). With Mike Hill's help, we got the computer back up, but the old kernel wouldn't work (I don't know why), so I compiled the drivers for the new kernel. We have successfully observed since then. However, in all of this, the "mem=3000M" kernel parameter got lost from the command line. Tonight, I must have had the bad luck that the andor camera was trying to use the wrong bit of memory and pavo segfaulted repeatedly in libandor. I finally figured it out, and then I fixed the boot command line and rebooted. Pavo then worked, again. 3. N1's north periscope indicated correctly tonight, but it seems that the encoder was not counting correctly. An index returned immediately as though the index pulse was stuck on. The quad counter was also apparently being continuously reset to zero (which happens when you get an index pulse when indexing, but should not happen if you are not explicitly indexing). The star was acquired almost immediately with S2, but N1 is unusable in this condition . . . I don't know what I can do remotely, and I have already spent far more time than I intended for a Saturday night.