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uvwide

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NAME

uvwide - Recompute wide band from narrow band  

PERSON RESPONSIBLE

pjt  

CATEGORIES

uv-data  

DESCRIPTION

UVWIDE is a MIRIAD task which allows you to recompute the wide band data from the narrow band data.

It is also possible to reset the narrow band flags, based on the wide band flags, and vice versa.

Note: this program used to be BIMA specific, where the first two widebands were the global LSB/USB averages, CARMA uses nwide=nspect and thus the program is now generally usable.

UVCAL can also be used to make wideband channels, using options=avechan.

WARNING: this program does not work on old BIMA data anymore where the number of wide band channels was 2 more than the number of spectral windows.  

PARAMETERS

vis
The name of the input visibility dataset. No default.
out
The name of the recomputed output visibility dataset. If no dataset given, program will flag the wideband flags based on all the narrow flags. Default: none.
reset
A logical that describes whether or not all wideband data is recomputed. By default (reset=true), all wideband data is recomputed regardless of the value of the previously existing wideband flags; otherwise (reset=false), only wideband data with valid flags are recomputed (i.e. data flagged bad are simply copied). Default: true.
narrow
A logical that describes if the narrow band data need to be re-flagged, based on existing wide band flags. If set, the narrow band flags that belong to a flagged wide band flag, are flagged. Default: false.
edge
If given, discard this number of edge channels of the spectral windows. Default: 0
blankf
If given, discard this fraction of each edge from a spectral window. At BIMA this fraction was 0.033. Normally the edge= keyword would be used. Default: 0.0
nwide
If used, and allowed, this will be the number of wide band channels created when none are present in the input file. The channels used to compute the wideband data are derived from the first 'nwide' spectral windows (i.e. NWIDE.le. NSPECT). For fancy preprocessing, use UVAVER before running UVWIDE with the NWIDE= option.
wsystemp
Boolean if to recompute the wsystemp from systemp (currently just a copy) Default: true


 

Index

NAME
PERSON RESPONSIBLE
CATEGORIES
DESCRIPTION
PARAMETERS

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Time: 18:35:39 GMT, July 05, 2011