sample_rate sampling rate in Hz
carrier_offset offset to B1C carrier in Hz (positive or negative)""")
parser.disable_interspersed_args()
parser.add_option("--prn", default="1-63", help="PRNs to search, e.g. 1,3,7-14,31 (default %default)")
parser.add_option("--doppler-search", metavar="MIN,MAX,INCR", default="-7000,7000,20", help="Doppler search grid: min,max,increment (default %default)")
parser.add_option("--time", type="int", default=80, help="integration time in milliseconds (default %default)")
(options, args) = parser.parse_args()
filename = args[0]
fs = float(args[1])
coffset = float(args[2])
prns = util.parse_list_ranges(options.prn)
doppler_search = util.parse_list_floats(options.doppler_search)
ms = options.time
# read first portion of file
ms_pad = ms + 5
n = int(fs*0.001*ms_pad)
fp = open(filename,"rb")
x = io.get_samples_complex(fp,n)
# resample to 8.192 MHz
fsr = 8192000.0/fs
nco.mix(x,-coffset/fs,0)
h = scipy.signal.firwin(161,4e6/(fs/2),window='hanning')
x = scipy.signal.filtfilt(h,[1],x)
"initial time intervals for wide FLL, then narrow FLL, in milliseconds (default %default)"
)
parser.add_option(
"--carrier-phase",
help=
"initial carrier phase in cycles (disables FLL: uses PLL from the start)")
(options, args) = parser.parse_args()
filename = args[0]
fs = float(args[1])
coffset = float(args[2])
prn = int(args[3])
doppler = float(args[4])
code_offset = float(args[5])
loop_dwells = util.parse_list_floats(options.loop_dwells)
carrier_p = 0.0
if options.carrier_phase is not None:
carrier_p = float(options.carrier_phase)
loop_dwells = 0, 0
fll_wide_time, fll_narrow_time = loop_dwells
fp = open(filename, "rb")
n = int(fs * 0.001 * ((b1i.code_length - code_offset) /
b1i.code_length)) # align with 1 ms code boundary
x = io.get_samples_complex(fp, n)
code_offset += n * 1000.0 * b1i.code_length / fs
s = tracking_state(
