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Below follows the field and the description of the various field patterns:
-
For
Point
:
Figure 6.12:
The field pattern
point
panel for the Scheduling Block Field Source Form
|
-
PointingPattern: Offset
: Tick if the pointing pattern position is an offset w.r.t. the source. If not ticked absolute positions are provided.
-
Offset Unit
(Type=point): Units of the offset (only if
Offset
is ticked).
-
For
rectangle
:
Figure 6.13:
The field pattern
rectangle
panel for the Scheduling Block Field Source Form
|
-
Coords Type
: Field center in absolute or relative coordinates. In case
Absolute
is selected the specifications for the field center need to be provided. In case
Relative
the offset from the source coordinated shall be provided.
-
Pattern Center Coords
-
System
: Coordinate System (ABSOLUTE only).
-
RA
: Absolute field center coordinate(RA) (ABSOLUTE only).
-
DEC
: Absolute field center coordinate(Dec) (ABSOLUTE only).
-
Offset[RA]
: RA offset from the source coordinate (RELATIVE only).
-
Offset[DEC]
: DEC offset from the source coordinate (RELATIVE only).
-
Lat. length
: Length of the rectangle in the latitudinal coordinate.
-
Orthogonal step
: Step size in the direction orthogonal to the scan direction.
-
Long. length
: Length of the rectangle in the longitudinal coordinate.
-
Scan Direction
: The scanning direction for the raster, either in longitude or latitude.
-
Unidirectional Scan
: Check if the scan shall always be done is the same direction.
-
Scan Velocity
: The scan velocity.
-
Orientation
: Position angle of the rectangle in the scanning coordinate frame. (Zero point and direction need to be agreed with control).
-
Scanning Coordinate System
: Select the coodinate system.
-
Setup Mosaic (Optional)
: Convert the setup top a pointed mosaic.
-
For
Cross
:
Figure 6.14:
The field pattern
cross
panel for the Scheduling Block Field Source Form
|
-
Pattern Center Coords
-
System
: Coordinate System (ABSOLUTE only).
-
RA
: Absolute field center coordinate(RA) (ABSOLUTE only).
-
DEC
: Absolute field center coordinate(Dec) (ABSOLUTE only).
-
Offset[RA]
: RA offset from the source coordinate (RELATIVE only).
-
Offset[DEC]
: DEC offset from the source coordinate (RELATIVE only).
-
Lat. length
: Length of the cross in the latitudinal coordinate.
-
Long. length
: The length of the cross in the longitudinal direction.
-
Initial Scan direction
: The initial scan direction for the cross.
-
Scan Velocity
: The scan velocity.
-
Orientation
: Position angle of the cross. NOTE: Zero point and direction need to be agreed with Control.
Next:
Instrument Setup
Up:
Field Sources
Previous:
FieldPatternEditor
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The ALMA OT Team, 2011 May 20