If you have a controlfile to compute the od and tangent altitude
it should be fairly easy to wrap this into a python function and
use scipy.optimize.root to find the zero of od - 1.0.
on behalf of Stefan Buehler
Sent: Friday, March 9, 2018 3:17:42 PM
To: ARTS Development List
Subject: [arts-dev] Transit radius
here is an ARTS challenge, not strictly important right now, but for my own
curiosity. Probably mostly to Patrick, but perhaps interesting also for others.
For exoplanet research, one observation technique provides the planet's transit
radius, that is, the tangent radius where the optical depth of the limb path is
Can we generate this with ARTS? The simple-minded way I can come up with is to
do a limb simulation and store opacity for each pencil-beam, along with its
tangent altitude. Then interpolate to find the tangent altitude for which the
opacity along the limb path is one.
Is there a smarter way?
And, for the way I outlined, what is the currently recommended way to get out
tangent altitude and opacity along the los?
If it is easy to generate, I feel tempted to include a “transit radius” view to
the nadir spectrum figure in the paper.
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