DEPSIM(1)
NAME
depsim_limb depsim_tbl depsim_crop depsim_vwbin depsim_rwbin
strategy modules to emulate the calculations by the MDI
Dedicated Experiment Processor (DEP) of tables used in
onboard image processing
SYNOPSIS
depsim_limb [-a] [argument= value ...]
etc.
DESCRIPTION
The set of modules depsim_* simulate the calculations by the
MDI Dedicated Experiment Processor (DEP) of the tables used
in onboard image processing. Each produces a table func-
tionally identical to the tables used in the onboard calcu-
lations. depsim_limb produces the appropriate binlist for
extraction of the annulus of pixels to be used for analysis
of the figure of the solar limb. depsim_tbl produces the
two lookup tables of reciprocals and square roots normalized
for 16-bit arithmetic.
The output data tables are normally placed in tables with
the same format as the (Level 0) MDI internal tables. If
the -a flag is specified, formatted ASCII data are addition-
ally sent to the history channel.
The output of depsim_limb is a FITS file with similar struc-
ture to the limb-mask tables. The DPC is set to 0, the
OP_code to 376, and the ``Reference Time'' to the time of
execution of the module.
In the formatted ASCII limb table produced by depsim_limb,
each line contains two integers representing the column
number and row number of an included pixel, respectively.
The lines are ordered in the same order that data pixels are
extracted.
ARGUMENTS
out=name The output dataset name.
xctr=float
yctr=float The x (column) and y (row) coordinates
of the presumed center of the solar
disc, specified in units of the pixel
width and measured from the center of
the cornermost pixel of the field. The
coordinates of the center of pixel (n,
m) are thus (n, m) and the coordinates
of a disc exactly centered in a
1024*1024-pixel field would be (511.5,
511.5). These arguments are required
for depsim_limb, depsim_crop,
depsim_vwbin, and depsim_rwbin. Note
that the values will be rounded to the
nearest 1/8 of a pixel width. Default:
(511.5, 511.5).
rinner=float
router=float Values to be used by depsim_limb for the
desired inner and outer radii, respec-
tively, of the annulus, in units of the
pixel size. Note that the desired radii
will be rounded to the nearest 1/8 of a
pixel width. Defaults: rinner =
477.625, router = 483.625.
EXAMPLES
FILES
SEE ALSO
DIAGNOSTICS
BUGS
depsim_limb is the only individual module that exists so
far.
The ways of distinguishing the binary output of the simula-
tor from real downloaded tables (e.g. the DPC and the
recording of the Reference Time attribute in Pacific Stan-
dard Time) may not be appropriate.
The use of the -a flag is discouraged.
AUTHOR
Rick Bogart
HISTORY
1995-11-19 SOI Version 1.1