<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Aptos;
panose-1:2 11 0 4 2 2 2 2 2 4;}
@font-face
{font-family:Menlo;
panose-1:2 11 6 9 3 8 4 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:12.0pt;
font-family:"Aptos",sans-serif;
mso-ligatures:standardcontextual;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Aptos",sans-serif;
color:windowtext;}
p.p1, li.p1, div.p1
{mso-style-name:p1;
margin:0in;
font-size:10.5pt;
font-family:Menlo;
color:black;}
span.s1
{mso-style-name:s1;}
span.apple-converted-space
{mso-style-name:apple-converted-space;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style>
</head>
<body lang="EN-US" link="#467886" vlink="#96607D" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt">Dear colleague,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I have text installed AIPS 2023 on my Macbook Pro and it’s running smoothly. I am encountering a problem while running the task FLATN. Here I want to interpolate 25 fields into one as I have performed a wide-field
imaging (610 MHz data from GMRT telescope in India). The problem is that the task starts but doesn’t finish no matter how long I let take and I need to abort to get the terminal back. The resulting FLATNed image is junk without any intensities.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">##<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">LOCALH> FLATN1: Task FLATN (release of 31DEC23) begins<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">LOCALH> FLATN1: Create HDFN .FLATN . 1 (MA) on disk 1 cno 361<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">LOCALH> FLATN1: Field 1 included blc,trc 253 2247 773 2767<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">LOCALH> FLATN1: ZABORS: signal 15 received<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">LOCALH> FLATN1: ABORT!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">##<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">The image header of the FLATNed image:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Got(1) disk= 1 user= 100 type=MA HDFN.FLATN.1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Image=HDF-N (MA) Filename=HDFN .FLATN . 1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Telescope=GMRT Receiver=GMRT<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Observer=TOM User #= 100<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Observ. date=01-APR-2007 Map date=04-SEP-2024<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Pixel type: FLOATING Magic value blanking<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Minimum= 1.00000002E+20 Maximum=-1.00000002E+20 JY/BEAM<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: ----------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Type Pixels Coord value at Pixel Coord incr Rotat<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: RA---SIN 3000 12 36 49.403515 1500.00 -1.380 0.00<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: DEC--SIN 3000 62 12 57.973953 1501.00 1.380 0.00<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: FREQ 1 6.1737502E+08 1.00 1.375000E+07 0.00<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: STOKES 1 1.0000000E+00 1.00 1.000000E+00 0.00<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: ----------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Coordinate equinox 2000.00<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Map type=NORMAL Number of iterations= 2413<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Conv size= 7.08 X 5.92 Position angle= 28.46<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Rest freq 0.000 Vel type: RADIO wrt YOU<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Alt ref. value 0.00000E+00 wrt pixel 0.45<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Keyword = 'WTNOISE ' value = 1.13333679D+00<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Keyword = 'SUMWTIN ' value = 1.42178117D+08<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Keyword = 'CCFLUX ' value = 2.569658E-02<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Keyword = 'CCTOTAL ' value = 1.265699E+00<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">AIPS 1: Keyword = 'MAXABSU ' value = -1.000000E+00<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">##<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">My box file for creating 25 fields is as below:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="p1"><span class="s1">F 1</span><span class="apple-converted-space"> </span>
<span class="s1">512 512</span><span class="apple-converted-space"> </span><span class="s1">1380
</span><span class="apple-converted-space"> </span><span class="s1">1380</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 2</span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">690
</span><span class="apple-converted-space"> </span><span class="s1">1380</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 3</span><span class="apple-converted-space"> </span>
<span class="s1">512 512</span><span class="apple-converted-space"> </span><span class="s1">0</span><span class="apple-converted-space">
</span><span class="s1">1380</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 4</span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">-690
</span><span class="apple-converted-space"> </span><span class="s1">1380</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 5</span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">-1380</span><span class="apple-converted-space">
</span><span class="s1">1380</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 6</span><span class="apple-converted-space"> </span>
<span class="s1">512 512</span><span class="apple-converted-space"> </span><span class="s1">1380
</span><span class="apple-converted-space"> </span><span class="s1">690</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 7</span><span class="apple-converted-space"> </span>
<span class="s1">512 512</span><span class="apple-converted-space"> </span><span class="s1">690</span><span class="apple-converted-space">
</span><span class="s1">690</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 8</span><span class="apple-converted-space"> </span>
<span class="s1">512 512</span><span class="apple-converted-space"> </span><span class="s1">0
</span><span class="apple-converted-space"> </span><span class="s1">690</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 9</span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">-690</span><span class="apple-converted-space">
</span><span class="s1">690</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 10 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">-1380
</span><span class="apple-converted-space"> </span><span class="s1">690</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 11 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512</span><span class="apple-converted-space"> </span><span class="s1">1380
</span><span class="apple-converted-space"> </span><span class="s1">0</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 12 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">690
</span><span class="apple-converted-space"> </span><span class="s1">0</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 13 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">0 0</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 14 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">-690
</span><span class="apple-converted-space"> </span><span class="s1">0</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 15 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">-1380</span><span class="apple-converted-space">
</span><span class="s1">0</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 16 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512</span><span class="apple-converted-space"> </span><span class="s1">1380</span><span class="apple-converted-space">
</span><span class="s1">-690</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 17 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">690</span><span class="apple-converted-space">
</span><span class="s1">-690</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 18 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">0
</span><span class="apple-converted-space"> </span><span class="s1">-690</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 19 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">-690</span><span class="apple-converted-space">
</span><span class="s1">-690</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 20 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">-1380 -690</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 21 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512</span><span class="apple-converted-space"> </span><span class="s1">1380</span><span class="apple-converted-space">
</span><span class="s1">-1380</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 22 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512</span><span class="apple-converted-space"> </span><span class="s1">690
</span><span class="apple-converted-space"> </span><span class="s1">-1380</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 23 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512 </span><span class="apple-converted-space"> </span><span class="s1">0</span><span class="apple-converted-space">
</span><span class="s1">-1380</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 24 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512</span><span class="apple-converted-space"> </span><span class="s1">-690</span><span class="apple-converted-space">
</span><span class="s1">-1380</span><o:p></o:p></p>
<p class="p1"><span class="s1">F 25 </span><span class="apple-converted-space"> </span>
<span class="s1">512 512</span><span class="apple-converted-space"> </span><span class="s1">-1380 -1380</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">##<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I will greatly appreciate any help in this regard.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thank you.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Arti Goyal<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
</div>
</body>
</html>