OwenModel.get_temperature_scale

giant.camera_models.owen_model:

OwenModel.get_temperature_scale(temperature)

This method computes the scaling to the focal length caused by a shift in temperature.

The temperature dependence is defined as a third order polynomial in temperature:

\[\Delta f = 1 + a_1 T + a_2 T^2 + a_3 T^3\]

where \(T\) is the temperature (usually in units of degrees Celsius).

You can use this method to get the temperature scaling as either a scalar value for a single parameter, or an array of values for an array of temperatures:

>>> from giant.camera_models import PinholeModel
>>> model = PinholeModel(a1=1, a2=2, a3=3)
>>> model.get_temperature_scale(5.5)
566.125
>>> model.get_temperature_scale([5.5, -2.5, 0])
array([ 566.125, -35.875, 1. ])

Parameters:

temperature (Sequence | ndarray | Real) – The temperature(s) to compute the scaling at

Returns:

the temperature scaling either as a float or a numpy ndarray

Return type:

float | ndarray