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Performance Goals and Scheduling Constraints
The Performance Parameters panel defines the science performance required for this SB.
- Representative Target: A Phase-2 program needs a Representative Target in order to validate and generation will usually set this to the first Field Source. The Doppler settings will be set based on the Representative Target.
- Representative Coordinates: The coordinates of the Representative Target.
- Representative Frequency: This is usually the centre frequency of representative spectral window defined in the Science Goal.
- Representative Receiver Band: Band corresponding to the Representative Frequency.
- Min. Angular Resolution: This and Max. Angular Resolution are set based on the angular-resolution input in the Science Goal. These fields are read by the automatic scheduler which will consider this SB observable if the angular resolution of the current array at the AOS lies within this range. Many other parameters go into deciding whether an SB is ultimately observed or not.
- Max. Angular Resolution: See above.
- Imaging Dynamic Range: This shows the highest dynamic range expected in an image made from the data from one of the sources in this SB. The OT calculates this dynamic range for both spectral line and continuum cases and displays the highest of these values. The spectral-line rms is that measured over one third of the line width.
- Spectral Dynamic Range: This shows the highest spectral dynamic range (continuum flux / line rms) expected for a source in this SB.
- Spectral Dynamic Range Bandwidth: The bandwidth that was used to calculate the line rms for the spectral dynamic range. The OT always uses one third of the line width.
- Largest Angular Scale: This is the value that was entered in the Science Goal.
- Nominal Configuration: This field is for information purposes only and gives the configurations that might be used by the Scheduling software to decide whether the SB can be run or not. The min. and max. angular resolutions (above) determine which configurations are used in practice.
- Max. Allowed Beam Axial Ratio: The expected beam axial ratio (major divided by minor axis) should always be less than this value.
Next: Temporal Constraints
Up: The Scheduling Block
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The ALMA OT Team, 2021 Feb 03