[daip] More details on curious error in SNSMO

[Anuj Sarma]

Hi,

With reference to my mail earlier today regarding 
the possibility of a bug in SNSMO, I think I
may have some clues which may throw light on 
the situation. 

After some work, I have discovered that all things being 
the same, SMOTY '' will give an error, but SMOTY 'AMPL'
will work fine. Now, since SMOTY '' is supposed to 
imply SMOTY 'AMPL', WHAT WE HAVE HERE is almost certainly
a bug in SNSMO.

Hope this helps.

Output when SNSMO is run with SMOTY '': 

SNSMO2: Task SNSMO  (release of 31DEC99) begins
SNSMO2: SNSMIN: UNKNOWN SMOOTHING CODE =
SNSMO2: Purports to die of UNNATURAL causes

Output when SNSMO is run with SMOTY 'AMPL':

SNSMO2: Task SNSMO  (release of 31DEC99) begins
SNSMO2: Copied SN file from vol/cno/vers  5    1   2 to  5    1   4
AIPS 2: Resumes
>SNSMO2: SNSMTH: Clipping SN table
SNSMO2: SNREF: re-referencing 100.00% of table entries to antenna   4
SNSMO2: SNSMTH: Smoothing SN table
SNSMO2: Appears to have ended successfully

Inputs to SNSMO (SMOTY changed as above for the two examples):

AIPS 2: SNSMO     Task which smooths and filters Solution(SN) tables.
AIPS 2: Adverbs         Values            Comments
AIPS 2: ----------------------------------------------------------------
AIPS 2: INNAME     'BS74_PASS2  '          Input UV file name (name)
AIPS 2: INCLASS    'UVDATA'                Input UV file name (class)
AIPS 2: INSEQ         1                    Input UV file name (seq. #)
AIPS 2: INDISK        5                    Input UV file disk unit #
AIPS 2: SOURCES    *all ' '                Source list ' '=>all.
AIPS 2: SELBAND      -1                    Bandwidth to select (kHz)
AIPS 2: SELFREQ      -1                    Frequency to select (MHz)
AIPS 2: FREQID       -1                    Freq. ID to select, 0=>all
AIPS 2: BIF           0                    Lowest IF number 0=>all
AIPS 2: EIF           0                    Highest IF number 0=>all
AIPS 2: TIMERANG   *all 0                  Time range to use.
AIPS 2: ANTENNAS   *all 0                  Antennas to correct.
AIPS 2: SUBARRAY      0                    Subarray; 0 => 1.
AIPS 2: INTERPOL   'MWF '                  Smoothing function
AIPS 2: BPARM      *all 0                  Smoothing parameters
AIPS 2: DOBLANK      -1                    Blanked value interpolation
AIPS 2: SMOTYPE    'AMPL'                  Data to smooth
AIPS 2: CPARM         0.1         0        Range of allowed delays and
AIPS 2:               0           0        rates.
AIPS 2:               0           0.005    *rest 0
AIPS 2: INVERS        2                    Input SN table; 0=>highest
AIPS 2: OUTVERS       4                    Output SN table; 0=>new
AIPS 2: REFANT        4                    Reference antenna 0=>pick.
AIPS 2: BADDISK    *all 0                  Disks to avoid for scratch

Regards,

Anuj
------------------------------------------------------------------------------
Anuj Pratim Sarma

Department of Physics & Astronomy
177, Chem-Phys Bldg.
University of Kentucky
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