Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.atnf.csiro.au/computing/software/gipsy/tsk/scanaid.dc1 Дата изменения: Tue Jan 8 07:53:42 2002 Дата индексирования: Fri Jan 16 18:16:36 2009 Кодировка: Поисковые слова: m 8

Program: SCANAID

Purpose: Add IRAS data with respect to a reference point (ADDSCAN)

Category: IRAS

File: scanaid.c

Author: T. Prusti

Keywords:

INIRDS= Input IRDS

OUTSET= Output set [Scans not stored in a set]
Set to contain the selected detector scans.

* OVERWRITE= Output set exists, ok to overwrite? [Y]/N
If OVERWRITE=N you will be prompted for another OUTSET=

FILENAME= Name of ASCII file: [No output to file]
If a name is specified, an ASCII file is created to
store data. If you press carriage return, there will
be no output to an ASCII file. If a given name already
exists, APPEND= must be specified.

* APPEND= File exists, ok to append? [Y]/N
The file specified in FILENAME= already exists.
You can append to this file with APPEND=Y. If APPEND=N
you will be prompted for another filename.

POS= Reference position [Center of the IRDS]

OBJECT= Name of the object in the reference position [IRDS name]

** UNITS= Output units [Jy]

** ACDC= ACDC conversion [default]
IRAS band dependent conversion factor to change
calibration applicable for point sources. Default
values are 1.282, 1.2195, 1.087 and 1.0 for 12, 25,
60 and 100 micron respectively. See Explanatory
Supplement page IV-9 for more information.

** INCFAC= Include factor in half detector units. [1.0]
Include scans crossing at a distance INCFAC * detector
half width. By default INCFAC is 1.0 which will select
only scans which had the reference position within the
nominal detector size.

SHOW= Control plotting of scans [Plot final result]
N(one), A(ll), O(ne by one) plotting can be chosen in
addition to the default to show the ADDSCAN result only.

* GRDEVICE= Plot device: [List of devices]
Destination of plot, Screen or Hardcopy.

** LENGTH= Length of the scan to be plotted (arcmin) [15 arcmin]
Length is the minimum length to be plotted and valid
only for the individual scans (not to ADDSCAN).

** AROUND= The minimum number of samples around the closest [5]
This value is used to select only those scans which
have at least AROUND samples before and after the
sample closest to the reference point. It is also
used to define the window for minimum and maximum
determination for baseline removal and plot limits.

** MINMAX= Fixed minimum and maximum value for plots [calculated]
Plot height will be fixed to contain at least the min
and max given by the user. Otherwise the plot y-scale
will vary from scan to scan. Units as from UNITS=.

** PGMOSAIC= View surface sub divisions in x,y: [1,1]
View surface can contain a number of plots in
in X and Y direction (mosaic). Default is 1 plot in
both X- and Y direction.

** PGPAPER= Give width(cm), aspect ratio: [calc, calc]
Aspect ratio is height/width.

** PGVIEW= Viewport on paper: [0.2 0.95 0.1 0.9]
It is possible to change the viewport on paper.
The parameters are x-left, x-right, y-bottom
y-top.

** PGCOLOR= Give color 1..15: [1]
See description for the available colors.

** PGWIDTH= Give line width 1..21: [2]

** PGHEIGHT= Give character height: [1.0]

** PGFONT= Give font 1..4: [2]


Description: From the given input IRDS all data crossing the given
reference point will be extracted and put in the given
output set after regridding the data into a finer grid.
The output set has axes for OFFSET (with respect to the
reference point) and SCANNR. SCANNR zero contains the
average of all scans (equivalent to ADDSCAN if the
default INCFAC=1.0 is kept).

For every detector scan selected a plot (if chosen) and
a line of information is given. In the plot the crosses
are the original data and the smooth line represents
the splined data. In the final ADDSCAN result the average
of the splined data is shown. The printed information
contains a running number (equal to SCANNR above), sop &
att numbers identifying the scan, detector number, in-scan
offset of the closest sample to the normal from the
detector scan to the reference point, in-scan step as
deduced from the immediate surroundings of the reference
point, twist angle of the scan, cross-scan offset between
the center of the detector and the detector scan, half
cross-scan size of the detector in question, modified
Julian Date (JD-2440000 e.g. 0 UT Jan 1, 1983 is 5335.5)
and IRDS info. The IRDS info contains SNIP and SDET
coordinates of the scan in the original input IRDS set.
Also the number of the closest sample in the IRDS is listed.

Color indices:

0 Background
1 Default (Black if background is white)
2 Red
3 Green
4 Blue
5 Cyan
6 Magenta
7 Yellow
8 Orange
9 Green + Yellow
10 Green + Cyan
11 Blue + Cyan
12 Blue + Magenta
13 Red + Magenta
14 Dark Gray
15 Light Gray
16-255 Undefined

Available fonts:

1 single stroke "normal" font
2 roman font
3 italic font
4 script font

Notes: The program only selects scans. It is left up to the user
to extract the final result either from the final plot
or from the outset. The baseline removal is primitive and
should be controlled for high precision work.

For the pointed observations it may be necessary to define
ACDC and AROUND (see above) to get correct results.

Hints: Use keywords PGMOSAIC= and MINMAX= to plot several scans
in one scale on one page.

Updates: Aug 5, 1992: TP, Document created and test version released.
May 26, 1993: TP, Version 1.0 released.
Jun 1, 1993: TP, Handling of units simplified.
Jun 2, 1993: TP, MINMAX= handling fixed.
Jun 3, 1993: TP, Modifications made to improve PO handling.
Nov 11, 1993: TP, Allow change of viewport.
Apr 12, 1995: VOG/ZAAL Implemented CDELT1 for OFFSET axis
'Ytitle' position default (PGLAB)
Dec 12, 2001: DK, provide more precision on JD.