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Table 1
AOTs for HIFI.
| Reference scheme | AOT/mode name | |||
| AOT I | AOT II | AOT III | ||
| single point | mapping | spectral scan | ||
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|
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| 1 | Position switch | Mode I-1 | Mode II-1 | |
| PointPositionSwitch | On-the-fly (OTF) | |||
| 2 | Dual beam switch | Mode I-2 | Mode II-2 | Mode III-2 |
| DBS and FastDBS | DBS or FastDBS raster | DBS or FastDBS | ||
| 3 | Frequency switch | Mode I-3 | Mode II-3 | Mode III-3 |
| FSwitch | OTF FSwitch | FSwitch | ||
| 4 | Load chop | Mode I-4 | Mode II-4 | Mode III-4 |
| Load chop | OTF Load chop | Load chop | ||
Notes. All mapping modes have Nyquist or a lower sampling capability. All dual beam switch modes have optional continuum stabilization. All frequency switch and load chop modes have optional addition of a sky reference.
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