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\title{
``HARPA: A versatile three-dimensional Hamiltonian ray-tracing program for
acoustic waves in the atmosphere above irregular terrain'', by R. Michael
Jones, J. P. Riley, and T. M. Georges, NOAA special report, August 1986}
\date{Errata, \today}
\maketitle
\section{Documentation Errata}
page 31:  The Transmitter latitude (W4) should have ``km'' circled.  (20
April 2007)\\
\\
pages 31 and 199:     On the ``form to specify input data'', ``stop
frequency stepping'' should be changed to ``stop elevation angle
stepping,'' and W30, W31, and W32 should be changed to W278, W279, and
W280, respectively.\\
\\
pages 33 and 221:     The model check number in the ``Form to specify input
data for receiver-surface model RTERR'' should be 2.0 instead of 3.0\\
\\
page 49, Fig. 2.23:  The implied decimal point for latitude of transmitter
should be between card columns 16 and 17.  The implied decimal point for
longitude of transmitter should be between card columns 22 and 23.  The
implied decimal point for imaginary part of wave polarization at
transmitter should be between card columns 75 and 76.  (20 April 2007)\\
\\
page 50, Fig. 2.24:  The imaginary part of wave polarization should be in
card columns 74-77, and the implied decimal point should be between card
columns 75 and 76.  (20 April 2007)\\
\\
page 69:     The last two lines should read:\\
\\
 {***} Format type 1 implies format number A (see Table 5.3).\\
 {***} Format type 2 implies format number 1, 2, or 3 (see Table 5.3).\\
\\
pages 94 through 98:     The figure captions for Figures 6.1 through 6.5
should have the following added:\\
\\
Circled block numbers correspond to program statement numbers.\\
\\
page 98:     In Figure 6.5, the lower branch on ``Test mode.'' should
read:\\
\\
\hspace*{.5 in}MODE = 4 and $y_{i,1} \ne 0$\\
\\
page 101:     The last sentence in Section 6.4 should refer to Table 7.17
instead of 7.9.\\
\\
page 102:     The second line of the first full paragraph should refer to
equation (6.30) rather than (4.1).\\
\\
page 136:     The first note in the caption to Figure 7.10 should read:\\
\\
{*}    See Equation (6.83) to estimate the time of the nearest closest
approach to the specified surface.\\
\\
pages 177 through 196:  The calculation of absorption in the sample
printout and sample raysets is incorrect.  The correct values are in the
files dinp.sam and punch.sam  (3 June 2004)\\
\\
page 200:  The sentence ``Superimpose these raypath plots on the graph of
the previous runset:'' should read ``Superimpose these raypath plots on the
graph of the next runset:''  (29 October 2003)\\
\\
page 221:     The model check number in the ``Form to specify input data
for receiver-surface model RTERR'' should be 2.0 instead of 3.0  (3 June
2004)\\
\\
page 222:     The model check number in the ``Form to specify input data
for receiver-surface model RVERT'' should be 3.0 instead of 2.0
\section{Program Errata}
page 251:  Following line ``UCON  30'' in LOGICAL FUNCTION UCON, insert the
line:\\
\hspace*{.6 in}IF(CONV.EQ.-1.0) CONV = 1.0/EARTHR \hfill UCON305\\
\\
page 251:  Line ``UCON  38'' in LOGICAL FUNCTION UCON should be replaced
by:\\
\hspace*{.6 in}CNVV(1,3) = -1.0 \hfill UCON380\\
\\
page 329: (17 December 2002) The variable OWI in line ANWWL 70 in
SUBROUTINE ANWWL should be OW.\\
\\
page 332: (6 May 2003) The variable OW in line AWWWL 76 in SUBROUTINE AWWWL
should be OWI.\\
\\
page 344: (17 October 2003) Line WGAUSS18 in SUBROUTINE WGAUSS2 should be\\
\\
\hspace*{.6 in}DATA RECOGU/8.0/ \hfill WGAUSS18\\
\\
page 395:  Line ``RVERT 21'' in SUBROUTINE RVERT should be replaced by:\\
\hspace*{.6 in}DATA RECORR/3.0/ \hfill RVERT21
\section{Additional Errata from Appendix E of HARPO Report follows.}
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