21apr18 p3054 coherent search problems

21apr18



links to sections and plots:
the problem
setup
processing
average spectra/acf's
dynamic spectra
total power vs time
summary

Problem resolution:



The problem:

    P3054 took coherent search data on the frb at cband and lband using pupping on 21apr18. Jason reported that rfifind returned excessive power for both cband and lband (see rfifind plot for cband .pdf). I looked at two of the many files generated to see what was happening:


Experiment setup:

Puppi setup:

Receiver setup:


 Processing:

    The spectra in each file were first averaged over 1 row giving:

The row averaged spectra were used to make dynamic spectra, and total power by gpu vs time.
The file averaged spectra were plotted, and used to compute the acf.


Average spectra, acf

The first set of plots show the spectra averaged over each file (.ps) (.pdf)


Dynamic spectra:

    Dynamic spectra were generated from the .3 sec averaged spectra.

Dynamic spectra for Cband data (.png)

Dynamic spectra for lband data (.png)

Total power vs time

    The average power in each gpu band was computed (at the .3 second row time resolution) and then plotted vs time.

gpu power vs time (.ps) (.pdf)

Summary:

processing: x101/180421/p3054rfi.pro



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