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From: "Larry D'Addario" <ldaddari@tuc.nrao.edu>
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Date: Mon, 24 Apr 2000 09:40:51 -0700 (MST)
To: Kate Weatherall <kweather@cv3.cv.nrao.edu>
Cc: "Larry D'Addario" <ldaddari@tuc.nrao.edu>,
        Richard Thompson <athompso@cv3.cv.nrao.edu>
Subject: Re: New ALMA Memo.
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Kate,

Appended below is the submission form for our new memo.  I am assuming
that it will be #304; is that right?

I understand that Dick will provide a postscript file.

--Larry

======================================================================

MMA Memo Abstract Template


# abstract.template -- MMA Memo Series Electronic Abstract Template
#
# Comments are preceded by the "#" symbol.  Anything following a "#" is
# ignored.
#
# The following entry is for internal use only.  Do not fill it in.
#Number:


#
# Enter the MMA memo title in the following section
#
#Title:
Relative Sensitivity of Double- and Single-Sideband Systems for both
Total Power and Interferometry

#
# List the MMA memo authors in the order that they appear on the paper.
# Use a comma to separate the names of multiple authors.  List each author's
# affiliation in parenthesis following the name.
#
#Authors:
A. R. Thompson and L. R. D'Addario

#
# Enter the date that the memo was submitted in the format mm/dd/yy.
# ***** NOTE THAT THIS DATE FORMAT DOES NOT CONFORM TO ALMA STANDARDS *****
#Date:
04/24/00

#
# Enter a list of keywords which might be used to find this memo in an
# electronic search.  Multiple keywords should be separated by commas.
#
#Keywords:
receiver, sideband, SSB, DSB, interferometry, sensitivity

#
# Enter a plain ASCII abstract between here and the #END symbol
# 
#Abstract:

Comparison of double-sideband and single-sideband receiving systems
shows that the ratio of sensitivities is proportional to the inverse
ratio of the system temperatures.  In the case of interferometers,
where the complex cross correlation is measured, there is an
additional factor of $\sqrt{2}$ by which the sensitivity of
double-sideband systems is reduced.  This factor, which is not always
taken into account, does not apply to total power systems.  The
relative sensitivity of double- and single-sideband systems is
discussed for observations of both continuum and spectral line
radiation.  The results are then generalized to the intermediate case
of unequal sideband gain.  Finally, numerical results for ALMA from
earlier memos are reviewed and extended.


#END