test echo range for EK80 reduced sample rate

[MohamedNasser8]

Fixes #969
I don't know if the mean by reduced sampling rate is the reduced file size, if it is, The fifth test case do the same thing as me.
Or I should resample the data?

[leewujung]

@MohamedNasser8 : My bad, I did not put in enough info the original description in #969.

Here the reduced sampling rate refers to a specific setup the EK80 instrument allows. That setup would make the discretization along the range_sample axis coarser in the EchoData object (from the open_raw function), which affects the echo_range values in the output of compute_Sv. The intention of #969 is to check the calculation against the expected values from another program. I got some sample data from a colleague from #702, and will put that somewhere for you to download, and the expected values it should be tested against.

[MohamedNasser8]

@leewujung Thanks for your illustration, I'm waiting for the data to test it.

[MohamedNasser8]

Hello @leewujung, I just wanted to remind you about the data I can test with.

[ctuguinay]

I'm going to close this. I think this should probably be tested when we get in-lab EK80 systems in conjunction with the many other possible configurations @leewujung

[leewujung]

yeah but probably should keep this open as a reminder?

[ctuguinay]

Ah yeah I see