[daip] [!13084]: AIPS - DTSIM, new mount types

[Thomas Krichbaum]

Thomas Krichbaum updated #13084
-------------------------------

DTSIM, new mount types
----------------------

           Ticket ID: 13084
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/13084
                Name: Thomas Krichbaum
       Email address: tkrichbaum at mpifr-bonn.mpg.de
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): -- Unassigned --
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template group: Default
             Created: 29 November 2018 05:56 PM
             Updated: 29 November 2018 05:56 PM
           Reply due: 03 December 2018 05:56 PM (4d 0h 0m)
      Resolution due: 25 August 2021 12:00 AM (999d 6h 4m)

Dear colleague, we are testing DTSIM for simulating polarisation data where stations have non-zero and occasionally high Dterms. We are using DTSIM for proposal preparation, but also in view of high frequency VLBI with new stations, which do not all have very small D-terms (eg. ALMA, the LMT or the new Greenland Telescope).In this context I have 2 questions. A simple one and or more complicated one.1. Can you please confirm that for non-zero station D-terms the visibilities are altered in the correct way. Is there any assumption that the D-terms should be low (like it is assumed in LPCAL)? I used VPLOT to check if the RL/LL ratio depends on the Dterm, which was entered. I verified that non-zero Dterms have an effect on the data, which is good. At this point I wonder if there is some knowledge (or document) about possible approximations when calculating the antenna cross-talk. 2. Would it be possible to add the Nasmyth mount-type to DTSIM. Several of the newer GMVA/EHT VLBI stations have a Nasmyth mount. The Nasmuth mounts were already implemended in AIPS some years ago (e.g.  Mount=NS-R has mount type code 4 and Mount=NS-L has mount type code 5). So it would be really great if DTSIM would know them.Thanks a lot,                      Thomas

------------------------------------------------------
Staff CP:  https://help.nrao.edu/staff
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listmgr.nrao.edu/pipermail/daip/attachments/20181129/ca04a61b/attachment.html>