Table 4
Summary of all OOF holography campaigns.
| Campaign date | Purpose | Maps | Receiver | Frequency | Elevation range |
|---|---|---|---|---|---|
| August 2017 | Development pyoof and first orientation tests | – | 9 mm | 32.00 GHz | 69–76 deg |
| December 2019 | Gather phase-error maps and test different receiver | 19 | 7 mm | 34.75 GHz | 34–78 deg |
| December 2020 | Gather phase-error maps and solving orientation | 10 | 7 mm | 34.75 GHz | 61–79 deg |
| February 2021 | Gather phase-error maps multiple elevations | 14 | 7 mm | 34.75 GHz | 28–69 deg |
| March 2021 | Gather phase-error maps multiple elevations | 10 | 7 mm | 34.75 GHz | 27–40 deg |
| July 2021 | Evaluate corrections to look-up table and closure | – | 7 mm | 34.75 GHz | 17–79 deg |
Notes. The column labeled Maps corresponds to the number of phase-error maps computed from a single set of OOF holography observations (three beam maps) and each of them takes about ~45 min. When combined, these maps offer all types of scanning (azimuth, elevation, and combined) and also tests required to improve the pyoof software or find the true orientation between look-up table and phase-error maps. Only beam maps with a S/N ≥ 200 were used for analysis in Sect. 5. The Receiver column shows the receiver name convention at Effelsberg.
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