obs = '@' # Solarsystem Barycenter
else:
try:
if t2format:
obs = scopes2[fold_pfd.telescope.split()[0]]
else:
obs = scopes[fold_pfd.telescope.split()[0]]
except KeyError: sys.stderr.write("Unknown telescope!!! : " + fold_pfd.telescope)
# Read the polyco file (if required)
if (fold.psr and fold.topo):
if ("polycos" in fold_pfd.__dict__ and
not fold_pfd.polycos==0):
pcs = fold_pfd.polycos
else:
pcs = polycos(fold.psr, sys.argv[-1]+".polycos")
(fold.phs0, fold.f0) = pcs.get_phs_and_freq(fold.epochi, fold.epochf)
fold.f1 = fold.f2 = 0.0
else:
pcs = None
fold.phs0 = 0.0
(fold.f0, fold.f1, fold.f2) = psr_utils.p_to_f(fold.p0, fold.p1, fold.p2)
#
# Calculate the TOAs
#
if t2format:
print("FORMAT 1")
for ii in range(numtoas):
def __init__(self, filename):
self.pfd_filename = filename
infile = open(filename, "rb")
# See if the .bestprof file is around
try:
self.bestprof = bestprof(filename + ".bestprof")
except IOError:
self.bestprof = 0
swapchar = '<' # this is little-endian
data = infile.read(5 * 4)
testswap = struct.unpack(swapchar + "i" * 5, data)
# This is a hack to try and test the endianness of the data.
# None of the 5 values should be a large positive number.
if (Num.fabs(Num.asarray(testswap))).max() > 100000:
swapchar = '>' # this is big-endian
(self.numdms, self.numperiods, self.numpdots, self.nsub, self.npart) = \
struct.unpack(swapchar+"i"*5, data)
(self.proflen, self.numchan, self.pstep, self.pdstep, self.dmstep, \
self.ndmfact, self.npfact) = struct.unpack(swapchar+"i"*7, infile.read(7*4))
self.filenm = infile.read(
struct.unpack(swapchar + "i", infile.read(4))[0])
self.candnm = infile.read(
struct.unpack(swapchar + "i", infile.read(4))[0]).decode("utf-8")
self.telescope = infile.read(
struct.unpack(swapchar + "i", infile.read(4))[0]).decode("utf-8")
self.pgdev = infile.read(
struct.unpack(swapchar + "i", infile.read(4))[0])
test = infile.read(16)
if not test[:8] == b"Unknown" and b':' in test:
self.rastr = test[:test.find(b'\0')]
test = infile.read(16)
self.decstr = test[:test.find(b'\0')]
else:
self.rastr = "Unknown"
self.decstr = "Unknown"
if ':' not in test:
infile.seek(-16, 1) # rewind the file before the bad read
(self.dt, self.startT) = struct.unpack(swapchar + "dd",
infile.read(2 * 8))
(self.endT, self.tepoch, self.bepoch, self.avgvoverc, self.lofreq, \
self.chan_wid, self.bestdm) = struct.unpack(swapchar+"d"*7, infile.read(7*8))
# The following "fixes" (we think) the observing frequency of the Spigot
# based on tests done by Ingrid on 0737 (comparing it to GASP)
# The same sorts of corrections should be made to WAPP data as well...
# The tepoch corrections are empirically determined timing corrections
# Note that epoch is only double precision and so the floating
# point accuracy is ~1 us!
if self.telescope == 'GBT':
if (Num.fabs(Num.fmod(self.dt, 8.192e-05) < 1e-12) and \
("spigot" in filename.lower() or "guppi" not in filename.lower()) and \
(self.tepoch < 54832.0)):
sys.stderr.write("Assuming SPIGOT data...\n")
if self.chan_wid == 800.0 / 1024: # Spigot 800 MHz mode 2
self.lofreq -= 0.5 * self.chan_wid
# original values
#if self.tepoch > 0.0: self.tepoch += 0.039334/86400.0
#if self.bestprof: self.bestprof.epochf += 0.039334/86400.0
# values measured with 1713+0747 wrt BCPM2 on 13 Sept 2007
if self.tepoch > 0.0: self.tepoch += 0.039365 / 86400.0
if self.bestprof:
self.bestprof.epochf += 0.039365 / 86400.0
elif self.chan_wid == 800.0 / 2048:
self.lofreq -= 0.5 * self.chan_wid
if self.tepoch < 53700.0: # Spigot 800 MHz mode 16 (downsampled)
if self.tepoch > 0.0: self.tepoch += 0.039352 / 86400.0
if self.bestprof:
self.bestprof.epochf += 0.039352 / 86400.0
else: # Spigot 800 MHz mode 14
# values measured with 1713+0747 wrt BCPM2 on 13 Sept 2007
if self.tepoch > 0.0: self.tepoch += 0.039365 / 86400.0
if self.bestprof:
self.bestprof.epochf += 0.039365 / 86400.0
elif self.chan_wid == 50.0 / 1024 or self.chan_wid == 50.0 / 2048: # Spigot 50 MHz modes
self.lofreq += 0.5 * self.chan_wid
# Note: the offset has _not_ been measured for the 2048-lag mode
if self.tepoch > 0.0: self.tepoch += 0.039450 / 86400.0
if self.bestprof:
self.bestprof.epochf += 0.039450 / 86400.0
(self.topo_pow, tmp) = struct.unpack(swapchar + "f" * 2,
infile.read(2 * 4))
(self.topo_p1, self.topo_p2, self.topo_p3) = struct.unpack(swapchar+"d"*3, \
infile.read(3*8))
(self.bary_pow, tmp) = struct.unpack(swapchar + "f" * 2,
infile.read(2 * 4))
(self.bary_p1, self.bary_p2, self.bary_p3) = struct.unpack(swapchar+"d"*3, \
infile.read(3*8))
(self.fold_pow, tmp) = struct.unpack(swapchar + "f" * 2,
infile.read(2 * 4))
(self.fold_p1, self.fold_p2, self.fold_p3) = struct.unpack(swapchar+"d"*3, \
infile.read(3*8))
# Save current p, pd, pdd
# NOTE: Fold values are actually frequencies!
self.curr_p1, self.curr_p2, self.curr_p3 = \
psr_utils.p_to_f(self.fold_p1, self.fold_p2, self.fold_p3)
self.pdelays_bins = Num.zeros(self.npart, dtype='d')
(self.orb_p, self.orb_e, self.orb_x, self.orb_w, self.orb_t, self.orb_pd, \
self.orb_wd) = struct.unpack(swapchar+"d"*7, infile.read(7*8))
self.dms = Num.asarray(struct.unpack(swapchar+"d"*self.numdms, \
infile.read(self.numdms*8)))
if self.numdms == 1:
self.dms = self.dms[0]
self.periods = Num.asarray(struct.unpack(swapchar+"d"*self.numperiods, \
infile.read(self.numperiods*8)))
self.pdots = Num.asarray(struct.unpack(swapchar+"d"*self.numpdots, \
infile.read(self.numpdots*8)))
self.numprofs = self.nsub * self.npart
if (swapchar == '<'): # little endian
self.profs = Num.zeros((self.npart, self.nsub, self.proflen),
dtype='d')
for ii in range(self.npart):
for jj in range(self.nsub):
self.profs[ii,
jj, :] = Num.fromfile(infile, Num.float64,
self.proflen)
else:
self.profs = Num.asarray(struct.unpack(swapchar+"d"*self.numprofs*self.proflen, \
infile.read(self.numprofs*self.proflen*8)))
self.profs = Num.reshape(self.profs,
(self.npart, self.nsub, self.proflen))
if (self.numchan == 1):
try:
idata = infodata.infodata(
self.filenm[:self.filenm.rfind(b'.')] + b".inf")
try:
if idata.waveband == "Radio":
self.bestdm = idata.DM
self.numchan = idata.numchan
except:
self.bestdm = 0.0
self.numchan = 1
except IOError:
print("Warning! Can't open the .inf file for " + filename +
"!")
self.binspersec = self.fold_p1 * self.proflen
self.chanpersub = self.numchan // self.nsub
self.subdeltafreq = self.chan_wid * self.chanpersub
self.hifreq = self.lofreq + (self.numchan - 1) * self.chan_wid
self.losubfreq = self.lofreq + self.subdeltafreq - self.chan_wid
self.subfreqs = Num.arange(self.nsub, dtype='d')*self.subdeltafreq + \
self.losubfreq
self.subdelays_bins = Num.zeros(self.nsub, dtype='d')
# Save current DM
self.currdm = 0
self.killed_subbands = []
self.killed_intervals = []
self.pts_per_fold = []
# Note: a foldstats struct is read in as a group of 7 doubles
# the correspond to, in order:
# numdata, data_avg, data_var, numprof, prof_avg, prof_var, redchi
self.stats = Num.zeros((self.npart, self.nsub, 7), dtype='d')
for ii in range(self.npart):
currentstats = self.stats[ii]
for jj in range(self.nsub):
if (swapchar == '<'): # little endian
currentstats[jj] = Num.fromfile(infile, Num.float64, 7)
else:
currentstats[jj] = Num.asarray(struct.unpack(swapchar+"d"*7, \
infile.read(7*8)))
self.pts_per_fold.append(
self.stats[ii][0][0]) # numdata from foldstats
self.start_secs = Num.add.accumulate([0] +
self.pts_per_fold[:-1]) * self.dt
self.pts_per_fold = Num.asarray(self.pts_per_fold)
self.mid_secs = self.start_secs + 0.5 * self.dt * self.pts_per_fold
if (not self.tepoch == 0.0):
self.start_topo_MJDs = self.start_secs / 86400.0 + self.tepoch
self.mid_topo_MJDs = self.mid_secs / 86400.0 + self.tepoch
if (not self.bepoch == 0.0):
self.start_bary_MJDs = self.start_secs / 86400.0 + self.bepoch
self.mid_bary_MJDs = self.mid_secs / 86400.0 + self.bepoch
self.Nfolded = Num.add.reduce(self.pts_per_fold)
self.T = self.Nfolded * self.dt
self.avgprof = (self.profs / self.proflen).sum()
self.varprof = self.calc_varprof()
# nominal number of degrees of freedom for reduced chi^2 calculation
self.DOFnom = float(self.proflen) - 1.0
# corrected number of degrees of freedom due to inter-bin correlations
self.dt_per_bin = self.curr_p1 / self.proflen / self.dt
self.DOFcor = self.DOFnom * self.DOF_corr()
infile.close()
self.barysubfreqs = None
if self.avgvoverc == 0:
if self.candnm.startswith("PSR_"):
# If this doesn't work, we should try to use the barycentering calcs
# in the presto module.
try:
psrname = self.candnm[4:]
self.polycos = polycos.polycos(psrname,
filenm=self.pfd_filename +
".polycos")
midMJD = self.tepoch + 0.5 * self.T / 86400.0
self.avgvoverc = self.polycos.get_voverc(
int(midMJD), midMJD - int(midMJD))
#sys.stderr.write("Approximate Doppler velocity (in c) is: %.4g\n"%self.avgvoverc)
# Make the Doppler correction
self.barysubfreqs = self.subfreqs * (1.0 + self.avgvoverc)
except IOError:
self.polycos = 0
if self.barysubfreqs is None:
self.barysubfreqs = self.subfreqs