0000065: The phase unstable in some telescopes.

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Category

Severity

Reproducibility

Date Submitted

Last Update

0000065

[submission] telescope

major

always

01-09-08 11:26

12-11-08 12:17

Reporter

Yuan Tang

View Status

public

Assigned To

Hans van der Marel

Priority

normal

Resolution

open

Status

closed

Summary

0000065: The phase unstable in some telescopes.

Description

In the recent period it has been found that at Lband the phase is unstable
  on RT3,4,9,A,C,D(maybe also RT2). Please look at 10804079,10804088,10804096,
  the system had been tunned by using these calibrator observations, the phase
  corrections jumped from +20/40deg to -20/40deg, then to +20/40deg again.

Additional Information

The problem of the phase unstable on some RTs is still there.
If you look at 10804224 and 10804225, the phase changed about
20 deg on RTC,D only about half hour late(for the same calibrator
3C286). If comparing 10804225(3C286) with 10804227(3C147) there
are quite big phase change on RT3,4,9,C,D.

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Issue History
Date Modified	Username	Field	Change
01-09-08 11:26	Yuan Tang	New Issue
01-09-08 11:27	Yuan Tang	Assigned To	=> Hans van der Marel
01-09-08 11:27	Yuan Tang	Status	new => assigned
15-09-08 15:09	Yuan Tang	Additional Information Updated
12-11-08 12:17	Bert Woestenburg	Status	assigned => closed