Resources for Hubble’s Focus Model

For a given time, this model estimates the amount of defocus at a particular camera. The model is a function of telemetered temperatures and secular non-thermal terms. The temperature-dependent part of the model is taken from Di Nino et al. 2008 while the long-term secular component is based on more recent fits given in Niemi et al., 2010. In addition to the temperature terms and secular fits, the model includes zero point offsets characterizing the focus offsets between cameras and channels.

Focus Model Interface

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