[daip] Re: UVCON
Leonia Kogan
lkogan at nrao.edu
Tue May 23 12:53:44 EDT 2006
Dear Stuart,
I am glad you have the first success with UVCON.
I am leaving at the end of this week for two weeks buisness trip and
will not be
able to serve you with UVCON that time.
So I want now to give you sme extra explanation of UVCON which may help
you to understand it better.:
1. When you forced zero at the end of each line UVCON works. So there
was sometn invisible after 2
at your input file.
2. You need use 1 instead of zero there. You got a success putting 1
only for the first line(antenna)
I guess if you put 1 for all antennas UVCON may not work.
Let me explain why:
APARM(4) min hour angle =0 at my example
APARM(5) max hour angle=0.1h=360sec at my axample
APARM(7) 500sec>360sec =>UVCON simullates only one hour angle at
hour angle =0
The hour angle is for site position (center of the array)given
at the second line of your input file
0.0 0.0 is grenwich => UVCON trys to simulate the observation at
Greenwich's hour angle=0
UVCON calculates the hour angle for your antennas to estimate
the elevation of each antenna
If you use 1 at the and of all Infile lines (this is right!!!)
you'll get negative elevations for all four(three) antennas
and UVCON rejects all visibilities because the elevation is
<APARM(6)=0.
If you use 0 for all lines but the first one, UVCON calculates
the elevation erroniously and
and it happens erroniously that elevations are positve for those
line and UVCON shod create
1 of three(if number of antennas is 3) visibilities rejecting
the base line 1-2, 1-3 and leaving only 2-3
You can check it looking at cno=63's imh
WHAT TO DO:
3. Use 0.0 0.0 at the second line
Very carefully select APARM(4), APARM(5), APARM(7) to get the
reasonable hour angle for your antennas
Actually APARM(4) =0+(or- (think yourself) longtitude of your site;
APARM(5) =APARM(4) + small number ( small if you want one time
observation (snapshot)
or and this may be the best for you
4 use Lat, long of a point near you r 3(4) antennas for example ant1;
the second line using ATCA -30 149 0
use 1 at the end of all lines (infile)
Use the the hour angle range (aparm(4,5,7)) as for ant1
Let me know if it is clear for you and use item 4
Good luck
LK
Stuart Weston wrote:
> Leonia,
>
> Used SMODEL, APARM & BPARM as you gave.
>
> The muddy water is clearing for me now.
>
> Got it, I am getting uv data now and uv plots that look right
> (comparing with MIRIAD and SCHED). XYZ match on repeat lines.
>
> Thank you very much for your patience with a struggling Pommy Kiwi,
> its making sense now.
>
> I will experiment some more and then try to apply an image.
>
> Stuart - Share & Enjoy
>
>
> Leonia Kogan wrote:
>
>> Stuart,
>>
>> I have ran UVCON using the input file with your four antennas and
>> using AIPS DEC3105 as you used.
>>
>> IT WORKS NO astericks, the second lines of the print out coincide
>> with the first ones.
>> I used zero at the second lines and nothing after 2s
>>
>> I did not used an image as a model. Instead I used
>> SMODEL 11 0
>>
>> APARM 0 3 0 0 0.1 0 500
>> BPARM =-1,0
>>
>> I recommend you to carry out the following tests. (use the same
>> inputs I used)
>>
>> 1. INFILE 'AIPSTARS:VLBA_UVCON'
>>
>> 2. INFILE <yourfile>
>> a) the second line is equal LAT, LONG of the first antenna;
>> put 1 after 2s (2 blank 1)
>> The second line at the outprint should be almoust zero for
>> the first antenna
>> put 0 after 2s (2 blank 0)
>> The second line at the outprint should be identical of the
>> first lines
>> b) the second line is zero
>> put 1 after 2s (2 blank 1)
>> The second line at the outprint should be asterics for X and
>> identical at Y,Z of the first lines
>> may be 'abort'
>> put 0 after 2s (2 blank 0)
>> The second line at the outprint should be identical of the
>> first lines
>> should work
>>
>> Let me know the result
>>
>> LK
>>
>>
>>
>>
>
>
>------------------------------------------------------------------------
>
>
>
>>go
>>
>>
>UVCON1: Task UVCON (release of 31DEC06) begins
>UVCON1: ZTXOP2: using translated file name =
>UVCON1: ZTXOP2: /home/aipsmgr/TEXT/STARS/VLBA_UVCON
>UVCON1: Number of antennas = 10
>UVCON1: Site latitude = 0.000 degrees
>UVCON1: Site longtitude = 0.000 degrees
>UVCON1: Coordinate conversion factor to meters = 1.00000E+00
>UVCON1: Diameter conversion factor to meters = 1.00000E+00
>UVCON1: A( 1):-2112065.-3705357. 4726814.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 1):-2112065.-3705357. 4726814.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 2):-1324009.-5332182. 3231962.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 2):-1324009.-5332182. 3231962.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 3): 1446375.-4447940. 4322306.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 3): 1446375.-4447940. 4322306.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 4):-1995678.-5037318. 3357328.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 4):-1995678.-5037318. 3357328.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 5):-1449752.-4975299. 3709124.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 5):-1449752.-4975299. 3709124.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 6):-5464075.-2495249. 2148297.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 6):-5464075.-2495249. 2148297.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 7): -130872.-4762317. 4226851.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 7): -130872.-4762317. 4226851.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 8):-2409150.-4478573. 3838617.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 8):-2409150.-4478573. 3838617.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 9):-1640954.-5014816. 3575412.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 9):-1640954.-5014816. 3575412.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 10): 2607849.-5488070. 1932739.; d= 25. ef= 0.55 T= 20.0 4
>UVCON1: A( 10): 2607849.-5488070. 1932739.; d= 25. ef= 0.55 T= 20.0 4
>AIPS 1: Resumes
>
>
>>UVCON1: Create UV DATA FILE.UVCON . 11 (UV) on disk 1 cno 59
>>
>>
>UVCON1: VISDFT: Begin DFT component subtraction
>UVCON1: VISDFT: Model components of type Point
>UVCON1: Model computation is 100 percent complete
>UVCON1: Appears to have ended successfully
>UVCON1: linux01 31DEC06 TST: Cpu= 0.0 Real= 0
>
>; NZ.ANT
>; This is the file of a proposed NZ VLBA configuration written as
>; the format input file for the AIPS task UVCON
>;
>; Stuart Weston - Auckland University of Technology, 2006
>;-----------------------------------------------------------------------
>; Station Code Latitude Longitude Elevation X Y
> Z
>;
>; Karaka, Akl, NZ -37 6 0.0 -174 51 0.0 30. -5072769.2477 457195.0294 -3826268.5670
>; Warkworth NI,NZ Wa -36 26 0.0 -174 30 0.0 100. -5047639.2149 486032.3756 -3855752.1675
>; Awarua SI,NZ Aw -46 31 0.0 -168 18 30.0 10. -4305611.17 890996.14 -4604962.76
>3
>0.0 0.0
>1 1
>0 -5072769.2477 457195.0294 -3826268.5670 6 0.5 47 2 0
>0 -5047639.2149 486032.3756 -3855752.1675 22 0.4 32 2 0
>0 -4305611.17 890996.14 -4604962.76 22 0.4 32 2 0
>
>
>
>
>>go
>>
>>
>UVCON1: Task UVCON (release of 31DEC06) begins
>UVCON1: ZTXOP2: using translated file name =
>UVCON1: ZTXOP2: /home/aipswrk/NZ.ANT
>UVCON1: Number of antennas = 3
>UVCON1: Site latitude = 0.000 degrees
>UVCON1: Site longtitude = 0.000 degrees
>UVCON1: Coordinate conversion factor to meters = 1.00000E+00
>UVCON1: Diameter conversion factor to meters = 1.00000E+00
>UVCON1: A( 1):-5072769. 457195.-3826269.; d= 6. ef= 0.50 T= 47.0 2
>UVCON1: A( 1):-5072769. 457195.-3826269.; d= 6. ef= 0.50 T= 47.0 2
>UVCON1: A( 2):-5047639. 486032.-3855752.; d= 22. ef= 0.40 T= 32.0 2
>UVCON1: A( 2):-5047639. 486032.-3855752.; d= 22. ef= 0.40 T= 32.0 2
>UVCON1: A( 3):-4305611. 890996.-4604963.; d= 22. ef= 0.40 T= 32.0 2
>UVCON1: A( 3):-4305611. 890996.-4604963.; d= 22. ef= 0.40 T= 32.0 2
>UVCON1: Create UV DATA FILE.UVCON . 12 (UV) on disk 1 cno 60
>UVCON1: VISDFT: Begin DFT component subtraction
>UVCON1: VISDFT: Model components of type Point
>UVCON1: Model computation is 100 percent complete
>UVCON1: Appears to have ended successfully
>UVCON1: linux01 31DEC06 TST: Cpu= 0.0 Real= 0
>AIPS 1: Resumes
>
>3
>0.0 0.0
>1 1
>0 -5072769.2477 457195.0294 -3826268.5670 6 0.5 47 2 1
>0 -5047639.2149 486032.3756 -3855752.1675 22 0.4 32 2 0
>0 -4305611.17 890996.14 -4604962.76 22 0.4 32 2 0
>
>
>
>
>>go
>>
>>
>UVCON1: Task UVCON (release of 31DEC06) begins
>UVCON1: ZTXOP2: using translated file name =
>UVCON1: ZTXOP2: /home/aipswrk/NZ.ANT
>UVCON1: Number of antennas = 3
>UVCON1: Site latitude = 0.000 degrees
>UVCON1: Site longtitude = 0.000 degrees
>UVCON1: Coordinate conversion factor to meters = 1.00000E+00
>UVCON1: Diameter conversion factor to meters = 1.00000E+00
>UVCON1: A( 1):-5072769. 457195.-3826269.; d= 6. ef= 0.50 T= 47.0 2
>UVCON1: A( 1):********* 457195.-3826269.; d= 6. ef= 0.50 T= 47.0 2
>UVCON1: A( 2):-5047639. 486032.-3855752.; d= 22. ef= 0.40 T= 32.0 2
>UVCON1: A( 2):-5047639. 486032.-3855752.; d= 22. ef= 0.40 T= 32.0 2
>UVCON1: A( 3):-4305611. 890996.-4604963.; d= 22. ef= 0.40 T= 32.0 2
>UVCON1: A( 3):-4305611. 890996.-4604963.; d= 22. ef= 0.40 T= 32.0 2
>UVCON1: Create UV DATA FILE.UVCON . 15 (UV) on disk 1 cno 63
>UVCON1: VISDFT: Begin DFT component subtraction
>UVCON1: VISDFT: Model components of type Point
>UVCON1: Model computation is 100 percent complete
>UVCON1: Appears to have ended successfully
>UVCON1: linux01 31DEC06 TST: Cpu= 0.0 Real= 0
>AIPS 1: Resumes
>
>
>
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