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Rectangle
This panel is only visible when
1 rectangular field
is selectedin the
Source
panel. This allows a rectangle to be defined thatwill subsequently be used to form a grid of pointing positions i.e. amosaic.
Figure 5.3:
The
Rectangle
panel in the the Field Setup form for the Science Goal.
|
-
Coords Type
: Choose between absolute or relative coordinates. This changes the interface that follows.
-
Field Center Coordinates
(Absolute)
-
System
: Coordinate System.
-
Sexagesimal display
: Used to switch between sexagesimal format or degrees.
-
RA
: The centre coordinate (Right Ascension) of the rectangle.
-
DEC
: The centre coordinate (Declination) of the rectangle.
-
Field Center Coordinates
(Relative)
-
Offset(Longitude)
: Longitude offset of the center of the rectangle from the source coordinate.
-
Offset(latitude)
: Latitude offset of the center of the rectangle from the source coordinate
-
p length
: Length of one side of the rectangle.
-
q length
: Length of the other side of the rectangle.
-
Position Angle
: Position angle of the long side of rectangle.
-
Spacing
: Spacing of each pointing within the rectangle. Can be specified in various angular units or in fraction of antenna primary beam. This parameter defaults to one half the width of the primary beam (Nyquist sampling).
Next:
Spectral Setup
Up:
Field Setup
Previous:
Field Center Coordinates
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The ALMA OT Team, 2011 May 20