# Bulk waveform gather
st = gather_waveforms_bulk(FBX_LON,
FBX_LAT,
MAX_RADIUS,
STARTTIME,
ENDTIME,
INFRASOUND_CHANNELS,
time_buffer=TIME_BUFFER,
remove_response=True)
# Add in AVO's Sand Point infrasound array
st += gather_waveforms('AVO',
'AV',
'SDPI',
'0?',
'BDF',
STARTTIME,
ENDTIME,
time_buffer=TIME_BUFFER,
remove_response=True)
st_proc = process_waveforms(st,
freqmin=FREQ_MIN,
freqmax=FREQ_MAX,
envelope=True,
smooth_win=SMOOTH_WIN,
decimation_rate=DECIMATION_RATE,
normalize=True)
#%% (3) Perform grid search
MAX_STATION_DIST = 0.8 # [km] Max. dist. from grid center to station (approx.)
FREQ_MIN = 0.5 # [Hz] Lower bandpass corner
FREQ_MAX = 10 # [Hz] Upper bandpass corner
DECIMATION_RATE = 10 # [Hz] New sampling rate to use for decimation
SMOOTH_WIN = 1 # [s] Smoothing window duration
# Automatically determine appropriate time buffer in s
time_buffer = calculate_time_buffer(grid, MAX_STATION_DIST)
st = gather_waveforms(source=SOURCE,
network=NETWORK,
station=STATION,
location=LOCATION,
channel=CHANNEL,
starttime=STARTTIME,
endtime=ENDTIME,
time_buffer=time_buffer)
st_proc = process_waveforms(st,
freqmin=FREQ_MIN,
freqmax=FREQ_MAX,
envelope=True,
smooth_win=SMOOTH_WIN,
decimation_rate=DECIMATION_RATE,
normalize=True)
#%% (3) Perform grid search
from rtm import grid_search
from obspy import UTCDateTime
from waveform_collection import gather_waveforms, gather_waveforms_bulk
# Time window of data to gather for all examples
STARTTIME = UTCDateTime(2019, 9, 22, 6)
ENDTIME = UTCDateTime(2019, 9, 22, 6, 10)
#%% Example 1 - Gather all infrasound records from Dillingham infrasound array
st = gather_waveforms(source='IRIS',
network='AV',
station='DLL',
location='*',
channel='*',
starttime=STARTTIME,
endtime=ENDTIME)
#%% Example 2 - Gather all BHN channel seismic records from within a 200 km radius of Iliamna volcano, Alaska
st_bulk = gather_waveforms_bulk(lon_0=-153.0918,
lat_0=60.0319,
max_radius=200,
starttime=STARTTIME,
endtime=ENDTIME,
channel='BHN')
LOCATION = '*'
CHANNEL = '*'
START = UTCDateTime('2018-12-19T01:45:00')
END = START + 20*60
# Filtering
FMIN = 0.1 # [Hz]
FMAX = 1 # [Hz]
# Array processing
WINLEN = 50 # [s]
WINOVER = 0.5
#%% Grab and filter waveforms
st = gather_waveforms(SOURCE, NETWORK, STATION, LOCATION, CHANNEL, START, END,
remove_response=True)
st.filter('bandpass', freqmin=FMIN, freqmax=FMAX, corners=2, zerophase=True)
st.taper(max_percentage=0.01)
#%% Array processing and plotting using least squares
from array_processing.algorithms.helpers import getrij
from array_processing.tools.plotting import array_plot
from lts_array import ltsva
latlist = [tr.stats.latitude for tr in st]
lonlist = [tr.stats.longitude for tr in st]
rij = getrij(latlist, lonlist)
