[daip] [!10702]: AIPS - Phase wraps 3C84
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Thu Jul 20 10:54:22 EDT 2017
Amy Mioduszewski updated #10702
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Staff (Owner): Amy Mioduszewski (was: -- Unassigned --)
Phase wraps 3C84
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Ticket ID: 10702
URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/10702
Full Name: Jared Rice
Email: jrice at physics.unlv.edu
Creator: User
Department: AIPS Data Reduction
Staff (Owner): Amy Mioduszewski
Type: Issue
Status: Open
Priority: Default
SLA: NRAO E2E
Template Group: Default
Created: 19 July 2017 10:09 PM
Updated: 19 July 2017 10:09 PM
Due: 24 July 2017 02:54 PM (4d 0h 0m)
Resolution Due: 27 July 2017 10:09 PM (7d 7h 15m)
Due to the age of my Macbook Pro I am using 31DEC15 AIPS with Mac
OS X 10.6.8. I am working on a VLBA observation from uz001a and
following the steps in Appendix C of the AIPS Cookbook. I have run
VLBALOAD, VLBAFIX, VLBAEOPS, VLBATECR, VLBACCOR and
VLBAPCOR. The phases on 3C84 after VLBAPCOR do not look to have
improved much.
The attached plot crpl-ccor-6cm-if3-5.ps shows the result from
VLBACRPL for a segment of the 3C84 data before the pulse-cal
calibration. After running VLBAPCOR the phases do not look
much better. They seem to wrap very rapidly. Attached plot
crpl-pcor-6cm-if3-5.ps shows that 3C84 still has very rapid phase
wraps.
Does this look reasonable to you? Would there be some problem
connected with using 31DEC15? I have also attached the tasav file
uz001a-6cm.tasav. For reference, VLBAEOPS is CL 2, VLBATECR is CL 3,
VLBACCOR is CL 4 and SN 1, and VLBAPCOR is CL 5 and SN 2.
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