Antab: Too many outliers - automatic editing - outlier detection method

evn-vlbi / VLBI-utilities

Utilities that can be used at stations to help with VLBI observations.

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Antab: Too many outliers - automatic editing - outlier detection method #4

Open collioud opened 3 years ago

collioud commented 3 years ago

Hello, When using Antab, I am sometimes facing bbcs which are (literally) full of outliers (very bad/noisy data - see the illustration). I have two related questions:

Is there a way to have an option to automatically edit ALL outliers (button or key stroke) for the current bbc?
What is the current outlier detection method? Is there a way to adapt it/change its parameters?

Thanks! Arnaud

Antab_too_much_dot

bmarcote commented 3 years ago

Right now there is no option to edit all outliers, unfortunately.
The outlier criteria is a 10% tolerance with respect to the expected value (based on a least-square fit to the data). Currently that value is hardcodded, so it can only be changed there, when defining the tolerance. However, from the typical data observed in the EVN antennas, this cutoff has been found to be optimal in terms of detecting possible outliers.

collioud commented 3 years ago

* Right now there is no option to edit all outliers, unfortunately.

OK. If I really need this, maybe I will come up with something. I'll keep you in touch...

* The outlier criteria is a 10% tolerance with respect to the expected value (based on a least-square fit to the data). Currently that value is hardcodded, so it can only be changed there, when defining the `tolerance`. However, from the typical data observed in the EVN antennas, this cutoff has been found to be optimal in terms of detecting possible outliers.

Now I see the tolerance parameter, as well as the outliers function. I will try to play a bit with this. Thanks