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Calibration Status

Calibration Status. Frank Helmich – HIFI calibration manager. Overview. “History” Big picture Current status Meetings/proposals The future Schedule. History. Main in-orbit calibration work is; identification of the procedures for the in-orbit phase Plans for the in-orbit phase

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Calibration Status

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  1. Calibration Status Frank Helmich – HIFI calibration manager

  2. Overview • “History” • Big picture • Current status • Meetings/proposals • The future • Schedule

  3. History • Main in-orbit calibration work is; • identification of the procedures for the in-orbit phase • Plans for the in-orbit phase • Exercise and verify observing modes • Calibration of individual spectra • The ICC does so by writing documentation: • Calibration plan • Astronomical Calibration Sources • Calibration Use Cases (requirements and procedures)

  4. Current Status • It became clear that this was not sufficient. Extra documentation for: • Solar system objects (first issue) • Frame work document: • Band pass calibration (almost finished) • Spatial response (almost finished) • Frequencies (first approach made) • Calibration plan is almost finished • Astronomical calibration sources (draft 0.4 is sufficient for the time being) • Use cases are not on schedule • Error budget not on schedule, but also not a problem

  5. Meetings/proposals • Joint ALMA-HIFI calibration discussion • It is clear that we have the solar system objects in common with ALMA. For the rest there is hardly any overlap, due to the extreme difference between “beams” • HCalSG • Asteroids identified as the main overlap between the three Herschel instruments • Starting next semester we will try to coordinate ground measurements better (Hughes et al. JCMT-UK proposal) • All instruments face problems in the QM ground-calibration • There will be regular updates on pointing • Own initiative: Ground-based proposal CO 6-5 in AGB stars (strength & source extent); Joint Duth-Canadian proposal to JCMT)

  6. Future • Calibration review end November • To review the procedures and plans of the calibration group: i.e. Are we planning/doing the right thing? • What can be presented: • Calibration Plan • Frame work document • Astronomical calibration sources • Solar system objects • Use Case document • First part of calibration of AOTs • Not ready: • PV-plan • Normal operations plan

  7. Schedule • Schedule is tight • Manpower is lacking • However, a small group has achieved quite a lot over the last two years • We have created a common understanding of our calibration needs • We will have to work hard to be in time for the review, but prospects look good • We will need two more meetings before the review

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