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Rectangle
- Pattern Centre Coords:
- Coords Type: Choose between absolute or relative (to the Field Source) coordinates. Only FK5 J2000 and horizon systems are currently supported.
- Absolute offset inputs:
- Relative offset inputs:
- System:
- Offset(Longitude):
- Offset(Latitude):
- Lat. length: Length of one side of the rectangle.
- Orthogonal step: For raster scans - step size in the direction orthogonal to the scan direction.
- Long. length: Length of the other side of the rectangle.
- Scan Direction: For raster scans - the scanning direction for the raster, either in longitude or latitude.
- Unidirectional Scan: For raster scans - if checked, each scan will be made in the same direction.
- Scan Velocity: This cannot be set by the user.
- Orientation: Position angle of the rectangle.
- Scanning Coordinate System:
- Setup Mosaic (Optional): If desired, the above-entered rectangle size can be converted to a pointed mosaic. After filling in the following parameters and performing the conversion, the Field Pattern editor will revert to Point and the list of derived pointings will be shown.
- Frequency:
- Overlap:
- Spacing:
- Antenna:
- Layout Type: Triangle patterns are usually used.
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Up: Field Sources
Previous: Point
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The ALMA OT Team, 2016 Aug 23