def convert_tim_to_dat(tim): """Convert a SIGPROC time series .tim file to a PRESTO .dat time series Input: tim: The SIGPROC .tim time series file to convert. Output: datfn: The PRESTO .dat time series file """ if not tim.endswith(".tim"): raise ValueError("Was expecting a file name ending with '.tim'. " "Got: %s" % tim) path, fn = os.path.split(tim) basenm = fn[:-4] outfn = os.path.join(path, basenm + ".dat") hdr, hdrlen = sigproc.read_header(tim) N = sigproc.samples_per_file(tim, hdr, hdrlen) Ndone = 0 status = -1 with open(tim, 'rb') as inff, open(outfn, 'wb') as outff: inff.seek(hdrlen) data = np.fromfile(inff, dtype='float32', count=BLOCKSIZE) while data.size: data.tofile(outff) Ndone += data.size data = np.fromfile(inff, dtype='float32', count=BLOCKSIZE) newstatus = int(100.0 * Ndone / N) if newstatus > status: sys.stdout.write(" %d %%\r" % newstatus) sys.stdout.flush() status = newstatus return outfn
def __init__(self, fil_filenm): self.fil_filenm = fil_filenm self.basefilenm = fil_filenm[:fil_filenm.find(".fil")] filhdr, hdrlen = sigproc.read_header(fil_filenm) self.MJD = filhdr['tstart'] self.nchans = filhdr['nchans'] self.ra_rad = sigproc.ra2radians(filhdr['src_raj']) self.ra_string = pu.coord_to_string(*pu.rad_to_hms(self.ra_rad)) self.dec_rad = sigproc.dec2radians(filhdr['src_dej']) self.dec_string = pu.coord_to_string(*pu.rad_to_dms(self.dec_rad)) self.str_coords = "J"+"".join(self.ra_string.split(":")[:2]) if self.dec_rad >= 0.0: self.str_coords += "+" self.str_coords += "".join(self.dec_string.split(":")[:2]) self.az = filhdr['az_start'] self.el = 90.0-filhdr['za_start'] fillen = os.stat(fil_filenm)[6] self.raw_N = (fillen-hdrlen)/(filhdr['nbits']/8)/filhdr['nchans'] self.dt = filhdr['tsamp'] self.raw_T = self.raw_N * self.dt self.N = orig_N self.T = self.N * self.dt # Determine the average barycentric velocity of the observation self.baryv = presto.get_baryv(self.ra_string, self.dec_string, self.MJD, self.T, obs="GB") # Where to dump all the results # Directory structure is under the base_output_directory # according to base/MJD/filenmbase/beam self.outputdir = os.path.join(base_output_dir, str(int(self.MJD)), self.str_coords) # Figure out which host we are processing on self.hostname = socket.gethostname() # The fraction of the data recommended to be masked by rfifind self.masked_fraction = 0.0 # Initialize our timers self.rfifind_time = 0.0 self.downsample_time = 0.0 self.dedispersing_time = 0.0 self.FFT_time = 0.0 self.lo_accelsearch_time = 0.0 self.hi_accelsearch_time = 0.0 self.singlepulse_time = 0.0 self.sifting_time = 0.0 self.folding_time = 0.0 self.total_time = 0.0 # Inialize some candidate counters self.num_sifted_cands = 0 self.num_folded_cands = 0 self.num_single_cands = 0
def main(): for tim in args.timfiles: print("Working on %s" % tim) if args.write_dat: try: datfn = convert_tim_to_dat(tim) print(" Wrote PRESTO time series: %s" % datfn) except ValueError as e: sys.stderr.write("Error encountered when converting on %s" % tim) sys.stderr.write(str(e)) else: datfn = tim[-3:] + "dat" hdr, hdrlen = sigproc.read_header(tim) inffn = write_inf_file(datfn, hdr, hdrlen) print(" Wrote info data: %s" % inffn)
print("1st_file_samps = ", first_file_subints) print("numfiles = ", numfiles) break else: accum_subints += subints_per_file[ii] # Now make a command line option for guppidrift2fil.py tmpfilenm = "tmp%d.fil" % random.randint(0, 2**30) cmd = "guppidrift2fil.py --skip=%d --nsubint=%d -o %s " % \ (skip, raw_N, tmpfilenm) for goodfile in infilenms[ii:ii + numfiles]: cmd += "%s " % goodfile print(cmd) os.system(cmd) # Now read the header to determine what the correct filename # should be. Use that to rename the fil file. filhdr, hdrlen = sigproc.read_header(tmpfilenm) MJDi = int(filhdr['tstart']) ra_rad = sigproc.ra2radians(filhdr['src_raj']) ra_string = pu.coord_to_string(*pu.rad_to_hms(ra_rad)) dec_rad = sigproc.dec2radians(filhdr['src_dej']) dec_string = pu.coord_to_string(*pu.rad_to_dms(dec_rad)) str_coords = "".join(ra_string.split(":")[:2]) if dec_rad >= 0.0: str_coords += "+" str_coords += "".join(dec_string.split(":")[:2]) filfilenm = "GBT350drift_%d_%s.fil" % (MJDi, str_coords) os.rename(tmpfilenm, filfilenm) print("Renamed '%s' to '%s'." % (tmpfilenm, filfilenm))
def __init__(self, fil_filenm): self.fil_filenm = fil_filenm self.basefilenm = fil_filenm.rstrip(".fil") self.beam = int(self.basefilenm[-1]) filhdr, self.hdrlen = sigproc.read_header(fil_filenm) self.orig_filenm = filhdr['rawdatafile'] self.MJD = filhdr['tstart'] self.nchans = filhdr['nchans'] self.ra_rad = sigproc.ra2radians(filhdr['src_raj']) self.ra_string = psr_utils.coord_to_string(\ *psr_utils.rad_to_hms(self.ra_rad)) self.dec_rad = sigproc.dec2radians(filhdr['src_dej']) self.dec_string = psr_utils.coord_to_string(\ *psr_utils.rad_to_dms(self.dec_rad)) self.az = filhdr['az_start'] self.el = 90.0 - filhdr['za_start'] self.BW = abs(filhdr['foff']) * filhdr['nchans'] self.dt = filhdr['tsamp'] self.orig_N = sigproc.samples_per_file(fil_filenm, filhdr, self.hdrlen) self.orig_T = self.orig_N * self.dt self.N = psr_utils.choose_N(self.orig_N) self.T = self.N * self.dt # Update the RA and DEC from the database file if required newposn = read_db_posn(self.orig_filenm, self.beam) if newposn is not None: self.ra_string, self.dec_string = newposn # ... and use them to update the filterbank file fix_fil_posn(fil_filenm, self.hdrlen, self.ra_string, self.dec_string) # Determine the average barycentric velocity of the observation self.baryv = presto.get_baryv(self.ra_string, self.dec_string, self.MJD, self.T, obs="AO") # Where to dump all the results # Directory structure is under the base_output_directory # according to base/MJD/filenmbase/beam self.outputdir = os.path.join(base_output_directory, str(int(self.MJD)), self.basefilenm[:-2], str(self.beam)) # Figure out which host we are processing on self.hostname = socket.gethostname() # The fraction of the data recommended to be masked by rfifind self.masked_fraction = 0.0 # Initialize our timers self.rfifind_time = 0.0 self.downsample_time = 0.0 self.subbanding_time = 0.0 self.dedispersing_time = 0.0 self.FFT_time = 0.0 self.lo_accelsearch_time = 0.0 self.hi_accelsearch_time = 0.0 self.singlepulse_time = 0.0 self.sifting_time = 0.0 self.folding_time = 0.0 self.total_time = 0.0 # Inialize some candidate counters self.num_sifted_cands = 0 self.num_folded_cands = 0 self.num_single_cands = 0