[daip] phase gradient delit

[Leonia Kogan]

Dear Leonid Ivanovich,

The phase gradient is equivalent to delay.

You can use the task CLCOR to correct it.

Use OPCODE = 'SBDL'. Recalculate your slope to nanosec as 
dphase[cycles]/dchanel[Hz]; Use the slope in nansec as CLCORPRM;
See detailes typing <help clcor> at aips.

CLCOR will correct input CL table (GAINVER).

If
 
you have had a CL table as a result of your previous calibration 
and you plan to apply it, then copy this table (by TACOP) for safety 
and use the copied table as GAINVER.

Else 

copy your virgin CL table (by TACOP) for safety 
and use the copied table as GAINVER.


Then you can apply the corrected CL table using DOCALIB=1 and GAINUSE= GAINVER 
elsewhere.

Leonia

My best regards to all at IKI and to L. F.

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>From lmatveen at mx.iki.rssi.ru Mon Jul 16 08:15 MDT 2001
From: "Leonid Matveenko" <lmatveen at mx.iki.rssi.ru>
To: <lkogan at zia.aoc.NRAO.EDU>
Cc: <lmatveen at mx.iki.rssi.ru>
Subject: phase gradient delit
Date: Mon, 16 Jul 2001 18:17:02 +0400
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Dear Leonja,
Now you have hot time in your garden and in your office. In Moscow very warm
too.
We continue work with maser lines. Our data have gradient phase of the
spectral chanals:
 [d(Phase) / d(chanal)] , determinated by a correlator and spectra line
processing.
When we have continuum reference source  AIPS authomatically calculate
gradient of
the phase and delite it  from spectral data.
We have not continuum source but know the phase gradient. What I must made
for removed
the phase gradient of the data?
 Leonia, tell me please number of the paragraf of AIPS book.
Many thanks.  Hallo to Luda and your children, are they in your house now?
With warmest memories. L.I.




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