Re: [dspsr-users] .fil format

[Willem v. S. <van...@gm...>]

Hi William,

In principle, dspsr is able to read WAPP files.  I have not tested this
functionality in a long time but I don't see why it should have stopped
working.

The dspsr software package comes with a program called digifil that can
process time series data and write out SIGPROC filterbank format.

Combined, these two features mean that, in principle, digifil could be used
to convert from WAPP to SIGPROC filterbank format, with the following
caveat. The data will be converted from WAPP binary format to floating
point numbers, and these floating point numbers will then be requantized
using some specified number of bits per sample before writing out SIGPROC
binary format; therefore, the output data will not be a binary equivalent
representation of the input data.

For WAPP, this would have always been the case regardless of how the file
conversion is performed (WAPP stores a time series of ACFs and SIGPROC
stores a time series of PSDs).

I hope that this helps you to decide on how to proceed.

Cheers,
Willem


On 24 April 2018 at 23:21, William Edmondson <w.h...@cs...>
wrote:

> Hi folks.
>
> I’m currently using PRESTO to process some data from Parkes.
> I have lots of data from Arecibo in WAPP format which I also need to
> process.  PRESTO doesn’t handle those files.
>
> I need to convert the WAPP format to .fil
>
> I’ve used sigproc in the past, but there are compilation problems at
> Birmingham (where the data are held, and the processing software is
> compiled for me on the multiprocessor research cluster).  I’m not sure the
> problems can be resolved but I’m trying!  If that can be made to work I’d
> use sigproc to convert the format and then use PRESTO.
>
> Scott Ransom suggested dspsr could convert WAPP files to .fil (for
> subsequent use with PRESTO).
>
> Does dspsr offer that file conversion?  Or would I be obliged to do
> folding etc with dspsr?
>
> But before I go there….  I need to know if it sensible to ask the software
> folk managing my compute resource to compile dspsr.
>
> Comments please.
>
> Thanks.
>
> William.
>
> And by way of ps this provides some background:
>
> https://www.cambridge.org/core/journals/international-
> journal-of-astrobiology/article/the-utilization-of-
> pulsars-as-seti-beacons/5F880137A2B60CF81EB775FACD9ADB66
>
> If anyone wants a copy of that paper but can’t readily get it from CUP
> then email me.
>
>
>
>
> William Edmondson
> Honorary Senior Research Fellow
> School of Computer Science
> University of Birmingham
> West Midlands, UK
>
>
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