Chapter 13. HIFI AOTs

Table of Contents

13.1. Description of HIFI AOTs
13.2. HIFI Single Point AOT
13.2.1. Instrument Settings
13.2.2. Mixer Settings
13.2.3. Redshift selection
13.2.4. Spectrometer Choice
13.2.5. Save and Load of Instrument and Frequency Settings
13.2.6. Frequency Settings
13.2.7. Pointing Mode Selection
13.2.8. Time Estimator Settings
13.2.9. Getting the Observing Time Estimate
13.3. HIFI Mapping AOT
13.3.1. On-the-Fly (OTF) Mapping setup
13.3.2. On-the-Fly Scanning Map with Frequency Switch
13.3.3. On-the-Fly Scanning Map with Load Chop
13.3.4. DBS Raster Mapping mode
13.3.5. DBS Cross Map
13.3.6. Time Estimates for HIFI Mapping Modes
13.4. Spectral Scan AOT
13.4.1. Setting up the Frequency Range
13.4.2. Selecting the Redundancy
13.4.3. WBS Selection
13.4.4. DBS spectral scan: Fast Chop and Continuum Timing
13.4.5. Frequency switch spectral scan: Frequency throw
13.4.6. Spectral Scans with Load Chop
13.4.7. Time Estimator Settings For HIFI Spectral Scans

13.1. Description of HIFI AOTs

The HIFI Observers' Manual (HTML and PDF versions can be found at and respectively) provides basic information on the instrument, how the instrument works and its use. Several examples for setting up science observations with HIFI are also provided.

HIFI has three basic AOT forms for pointed, mapping and spectral scan observations. Several reference schemes are available for each type including dual beam switch (DBS) and frequency switch -- amongst others. The following sections describe the AOTs and the modes available within each AOT.