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• 2.1-m Antennas
  ...he U was much less pronounced than that of the Tecom feeds relative to the 27-m feed horns, so presumably the feed phase center has less of a meander than ...), then starting with (+Az, +Dec), sweeping to (-Az, -Dec). For the older antennas, the -Az corresponds to +RA and vice versa, i.e. (+RA, +Dec) to (-RA, -Dec)
  21 KB (3,451 words) - 12:49, 3 April 2024
• Attenuation and Level Control
  ...ging level. Still, it is safest to use a non-zero setting at any time the antennas are slewing from one source to another. ...o, the frontend attenuation should be under active control at any time the antennas are pointed at the Sun, so that large flares do not occur that can damage t
  15 KB (2,245 words) - 03:43, 27 September 2016
• 2017 April
  ...M attenuations working, so it should be okay now to use dcmauto-on for all antennas. '''20:47 UT''' This morning I did a complete test of the 27-m pointing model, by setting each parameter to unity in turn, with all others
  24 KB (4,205 words) - 18:56, 17 May 2017
• 2017 November
  '''At the end of the day, all antennas except for 11 & 13 (and 3, which has been down for a while for gear box fai
  4 KB (657 words) - 00:51, 29 November 2017
• Tohban OVRO-LWA Imaging Tutorial
  ...bility mode that records data for a 48-antenna subset (generally the outer antennas) and 768 frequencies at 1-s cadence. The recorders that record the data ar
  14 KB (2,177 words) - 15:29, 16 January 2024
• 2016 November
  '''05:42 UT''' Attempting to see the Moon with 27-m Hi receiver. I could see nothing at nominal position, but then I got a who ...ged (see upper left panel). The key is that XY and YX amplitude drops for antennas 1-5 and 12, when PA = -chi, while XX and YY increase.]]
  21 KB (3,613 words) - 11:12, 2 April 2017
• Reference Gain Calibration
  ...ypical reference calibration would cover 34 bands, 2 polarizations, and 13 antennas. The routines (on pipeline machine) to retrieve and analyze the data are in ...nd refcal['flag'] have a shape of (15, 2, 34) -- which corresponds to # of antennas, # of polarizations, and # of bands.
  55 KB (6,549 words) - 21:26, 19 March 2018
• Owen's Notes
  If there are any problems with any of the antennas goto [http://ovsa.njit.edu/EOVSA/ant_status/ant_status_form.php http://ovsa There are problems with any antennas or systems that are highlighted in red. Lines that are marked in yellow des
  162 KB (26,368 words) - 22:08, 23 April 2024
• System Gain Calibration
  [[File: Quick_Start.png|thumb|600px|First point the antennas off the Sun (e.g. at STOW), and in the schedule, issue the commands * A few antennas (e.g. the "prototype" frontends on Ant 1, 8 and 11) may not be able to reac
  36 KB (5,915 words) - 14:14, 9 March 2022
• Computing Systems
  ...ose of running Windows-only utilities including monitoring the ACC and the antennas. The DELL service tag number is C303GQ1. The main features of win1 are: ...more of these systems. Note that losing a ROACH board means that the two antennas input to that board are lost, and additionally all frequency channels (1/8t
  52 KB (8,199 words) - 15:24, 23 August 2022

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