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There is a page named "27-m Antennas" on this wiki. See also the other search results found.
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- The 27-m antennas are equatorially mounted. Their axis limits are variable with declination,169 bytes (24 words) - 00:22, 7 March 2020
Page text matches
- The 27-m antennas are equatorially mounted. Their axis limits are variable with declination,169 bytes (24 words) - 00:22, 7 March 2020
File:Pha vs ha 2253+161 20161009 independent fits.png ...Jy at C band) on 2016 Sep 7 under the fast frequency-sweeping mode of the 27-m low-frequency receiver. This plot is for the observation of 2253+161 for ~3(1,212 × 612 (125 KB)) - 12:37, 20 November 2016
File:Pha vs ha 2253+161 20161009 one fit.png ...Jy at C band) on 2016 Sep 7 under the fast frequency-sweeping mode of the 27-m low-frequency receiver. This plot is for the observation of 2253+161 for ~3(1,212 × 612 (116 KB)) - 12:40, 20 November 2016- ...algorithm in detail and see if there is a bug somewhere. I did leave the 27-m (ant14) pointing coefficients updated, although I do not have a good way to1 KB (205 words) - 13:00, 23 July 2019
- :* one with the 27-m feed tracking parallactic angle (gives parallel-feed data for azel dishes 1 :* one with the 27-m feed tracking parallactic angle + 90 degrees (gives crossed-feed data for a6 KB (1,012 words) - 14:23, 8 January 2018
- ...rotation between the 27-m antenna and the AzEl mounts, but not between the 27-m and the older equatorial mounts. This angle is called the "parallactic ang [[File:Feed_diagram.PNG|thumb|400px|'''Fig. 2:''' Illustration of 27-m feed horns (left), 2.1-m feed package (middle), and rotation of feed orient13 KB (2,051 words) - 12:49, 18 November 2016
- '''12:35 UT''' Good news! The 27-m receiver is back. When installed, it seemed to have a problem still with t ...oday's change is just as large, and in the opposite sense. However, other antennas had more complex changes, so this is not a general rule...4 KB (760 words) - 13:17, 1 September 2017
- ...g on the Sun is very difficult now due to the soft limit on Dec on the old antennas, of which Ant 13 is one. I am off to the AAS meeting tomorrow (actually to ...est to determine them, but after some sleuthing today I found that several antennas (esp. 10 and 12) still had large delays, and worse, the Lo receiver delay (2 KB (412 words) - 01:35, 13 January 2020
- ...made in C configuration (max baseline length 3 km) with the full array (27 antennas) in L band (1-2 GHz), with 2 MHz frequency resolution and 50 ms time resolu2 KB (171 words) - 02:24, 24 July 2018
- ...time that the starburst program was stopped (due to problems with the 27-m antennas), the hardware was largely, but not completely assembled. Here is a fairly2 KB (391 words) - 20:41, 7 September 2016
- ...he bandwidth. It is also valuable to test the sensitivity limit of EOVSA's 27-m + 2-m baseline within a reasonable amount of integration time (10 minutes). ..._visibility.py". They display the visibility of all VLA calibrators by the 27-m antenna above a certain flux density threshold (defined by parameter "minfl9 KB (1,374 words) - 03:16, 29 March 2017
- ...rotation between the 27-m antenna and the AzEl mounts, but not between the 27-m and the older equatorial mounts. This angle is called the "parallactic ang [[File:Feed_diagram.PNG|thumb|400px|'''Fig. 2:''' Illustration of 27-m feed horns (left), 2.1-m feed package (middle), and rotation of feed orient26 KB (4,197 words) - 12:32, 10 July 2020
- ...made in C configuration (max baseline length 3 km) with the full array (27 antennas) in L band (1-2 GHz), with 2 MHz frequency resolution and 50 ms time resolu2 KB (219 words) - 22:16, 19 September 2018
- ...k the performance of Ant 5, only to find that it looks just like the other antennas. Looking into it further, I discovered that Kjell had put the notch filter '''03:59 UT''' Because the 27-m focus rotation mechanism was out due to a power-supply failure, there have8 KB (1,465 words) - 11:54, 31 May 2017
- ...nd, which initiates a pointing procedure that does multiple offsets of the antennas and takes data that will be analyzed for determining frequency-dependent po ...in a subarray). If it is desired that a macro-command refer to only some antennas, it is best practice to omit the others from the current subarray first.26 KB (4,001 words) - 19:10, 27 September 2016
- The first step is to determine a consistent coordinate system. Antennas are typically measured in units such as meters along the ground. We will u ...aselines are differences of coordinates, i.e. for the baseline between two antennas we have a vector:17 KB (2,801 words) - 17:43, 28 June 2017
- ...ed from solpntanal() is added for all offsets except RA offsets on the old antennas (9, 10, 11 & 13). On those, it must be subtracted (basically it is a chang '''00:52 UT''' During today's solar observations, I made sure that the 27-m was tracking on all three scans. I will now do a test calibration on 3C8410 KB (1,696 words) - 11:13, 2 April 2017
- ...made in C configuration (max baseline length 3 km) with the full array (27 antennas) in L band (1-2 GHz), with 2 MHz frequency resolution and 50 ms time resolu4 KB (583 words) - 08:35, 15 November 2018
- ...rferometric pointing on cosmic sources or planets using one or both of the 27-m dishes. Each of these has merits, and all will likely be implemented. ...121..512D Dou et al. 2009, PASP, 121, 512]). The pointing offsets for all antennas can be determined simultaneously, and as a function of frequency, by offset35 KB (5,622 words) - 18:02, 26 September 2016
- ...t|'''Fig. 1:'''Amp vs. hour angle of the Jan 4 observations on 3C84 on all antennas (column) and polarizations (row; showing XX, XY, YX, and YY). Blue is the o ...decided to take some data on 3C273 with the low-frequency receiver on the 27-m. I created a sequence 3bands_lo.fsq, which tunes to bands 5, 7, 9. These8 KB (1,396 words) - 11:12, 2 April 2017
