Filterbank
SigprocFile
your.formats.pysigproc.SigprocFile(fp=None, copy_hdr=None)
Simple functions for reading sigproc filterbank files from python. Not all possible features are implemented.
Original Source from Paul Demorest's pysigproc.py.
Args:
fp (str): file name
copy_hdr (bool): copy header from another SigprocFile class object
Attributes:
rawdatafile (str): Raw data file
source_name (str): Source Name
machine_id (int): Machine ID
barycentric (int): If 1 the data is barycentered
pulsarcentric (int): Is the data in pulsar's frame of reference?
src_raj (float): RA of the source (HHMMSS.SS)
src_deg (float): Dec of the source (DDMMSS.SS)
az_start (float): Telescope Azimuth (degrees)
za_start (float): Telescope Zenith Angle (degrees)
fch1 (float): Frequency of first channel (MHz))
foff (float): Channel bandwidth (MHz)
nchans (int): Number of channels
nbeams (int): Number of beams in the rcvr.
ibeam (int): Beam number
nbits (int): Number of bits the data are recorded in.
tstart (float): Start MJD of the data
tsamp (float): Sampling interval (seconds)
nifs (int): Number of IFs in the data.
get_data
SigprocFile.get_data(nstart, nsamp, offset=0, pol=0)
Return nsamp time slices starting at nstart.
Args:
nstart (int): Starting spectra number to start reading from.
nsamp (int): Number of spectra to read.
offset (int): Can be used to offset reading from.
pol (int): Which polarisation to read.
Returns:
numpy.ndarray: data.
unpack
SigprocFile.unpack(nstart, nsamp)
Unpack nsamp time slices starting at nstart to 32-bit floats.
Args:
nstart (int): Starting spectra number to start reading from.
nsamp (int): Number of spectra to read.
Returns:
numpy.ndarray: Data
write_header
SigprocFile.write_header(filename)
Write the filterbank header
Args:
filename (str): name of the filterbank file
append_spectra
SigprocFile.append_spectra(spectra, filename)
Append spectra to the end of the file
Args:
spectra (numpy.ndarray): numpy array of the data to be dumped into the filterbank file
filename (str): name of the filterbank file