SKYNOISE

Generate a simulated sky background with spatial noise

Description:

This generates a simulated sky background with spatial noise following a power law spectrum.

Parameters:

FILENAME = _CHAR (Write)
Name of the output file containing the sky noise image.
MSG_FILTER = _CHAR (Read)
Control the verbosity of the application. Values can be NONE (no messages), QUIET (minimal messages), NORMAL, VERBOSE, DEBUG or ALL. [NORMAL]
OBSPAR = GROUP (Read)
Specifies values for the observation parameters used for skynoise generation.

The supplied value should be either a comma-separated list of strings or the name of a text file preceded by an up-arrow character "^" , containing one or more comma-separated (or line-break separated) lists of strings. Each string is either a " keyword=value" setting, or the name of a text file preceded by an up-arrow character " ^" . Such text files should contain further comma-separated lists which will be read and interpreted in the same manner (any blank lines or lines beginning with " #" are ignored). Within a text file, newlines can be used as delimiters, as well as commas. Settings are applied in the order in which they occur within the list, with later settings over-riding any earlier settings given for the same keyword.

Each individual setting should be of the form:

<keyword >= <value >

The parameter names and their default values are listed below. The default values will be used for any unspecified parameters. Unrecognized parameters are ignored (i.e. no error is reported).

SEED = INTEGER (Read)
Seed for random number generator. If a seed is not specified, the clock time in milliseconds is used.
SIMPAR = GROUP (Read)
Specifies values for the simulation parameters. See the description for OBSFILE for the file format.

The parameter names and their default values are listed below. The default values will be used for any unspecified parameters. Unrecognized parameters are ignored (i.e. no error is reported).

Observation Parameters :

lambda (DOUBLE)
Wavelength of observation in m. [0.85e-3]

Simulation Parameters :

aomega (DOUBLE)
Coupling factor (0.179 for 850 microns, 0.721 for 450 microns). [0.179]
atmname (CHAR)
Name of the file containing the atmospheric sky image.
atmrefnu (DOUBLE)
Atmospheric reference corner frequency in Hz. [0.5]
atmrefvel (DOUBLE)
Atmospheric reference velocity in m/s. [15.0]
bandGHz (DOUBLE)
Bandwidth in GHz. [35.0]
tauzen (DOUBLE)
Optical depth at 225 GHz at the zenith. [0.052583]

Related Applications

SMURF: SC2SIM