76 lines
3.1 KiB
Python
Executable File
76 lines
3.1 KiB
Python
Executable File
#!/usr/local/python3.7/bin/python3
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from datetime import datetime
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import time
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import math
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import requests
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import json
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import csv
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from os import path
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import sys
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min_speed=10.0
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min_width=15.0
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def getships():
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"""
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Retrieves MarineTraffic.com Extended Data from the API, using the ACF.ShipTracker@gmail.com API key.
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Collates the data, records the request time.
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If a vessel has a speed over 10 kts, the estimated wave height at distance 1m, 1000m, 2000m, and 3000m, are recorded.
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This is to be used in concert with the rest of ACF_ShipTracker python script to save as a CSV and email once a day.
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"""
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matrix = []
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req_time=datetime.utcnow().strftime("%FT%H:%M:%S")
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redata = json.loads(requests.get(
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'https://services.marinetraffic.com/api/exportvessels/v:8/ea1f4a05afbd000ba30772a9979bf7aa743092cb/timespan:60/msgtype:extended/protocol:json').content)
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for ship in range(len(redata)) :
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ship_speed_kts=float(redata[ship][5])/10.0 #in kts
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ship_width_m=float(redata[ship][17])
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if ship_speed_kts >= min_speed and ship_width_m >= min_width:
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shipdata = redata[ship]
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lat = shipdata[3]
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lon = shipdata[4]
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parameters = {'latitude': lat, 'longitude': lon}
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depth = float(str(requests.get('https://www.gmrt.org/services/PointServer?', params=parameters).content, 'utf-8'))*-1 # depth in m
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shipdata.extend([req_time, depth])
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ship_speed_ms=ship_speed_kts/1.944
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froude=ship_speed_ms/math.sqrt(9.8*depth)
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if shipdata[23]=='Tug':
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alpha_1=1.0
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else:
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alpha_1=0.35
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distance_interest=[1, 1000, 2000, 3000]
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for dist in distance_interest:
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wave_height=depth*alpha_1*((dist/depth)**-0.33)*froude**4
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shipdata.extend([round(wave_height,2)])
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matrix.append(shipdata)
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time_ships=datetime.today().strftime("%m/%d/%Y, %H:%M:%S")
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print('Ship data collected at {}'.format(time_ships), file=sys.stderr)
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print('\n'.join(map(str, matrix)), file=sys.stderr)
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return matrix
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rowheadings=[
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'MMSI', 'IMO', 'SHIP_ID', 'LAT', 'LON', 'SPEED',
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'HEADING', 'COURSE', 'STATUS', 'TIMESTAMP', 'DSRC', 'UTC_SECONDS',
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'SHIPNAME', 'SHIPTYPE', 'CALLSIGN', 'FLAG', 'LENGTH', 'WIDTH', 'GRT', 'DWT',
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'DRAUGHT', 'YEAR_BUILT', 'ROT', 'TYPE_NAME', 'AIS_TYPE_SUMMARY',
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'DESTINATION', 'ETA', 'Request Time', 'DEPTH','Est Wave Height 1m', 'Est Wave Height 1000m',
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'Est Wave Height 2000m', 'Est Wave Height 3000m'
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]
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# The following is not UTC, since /etc/localtime is America/New_York
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x2 = datetime.now()
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matrix = getships()
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csv_name = "/var/log/acfst/ACFshipdata_{}-{}-{}.csv".format(x2.year, '{:02d}'.format(x2.month), '{:02d}'.format(x2.day))
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if path.exists(csv_name): # ship log exists
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with open(csv_name, 'a') as outfile:
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writer = csv.writer(outfile)
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writer.writerows(matrix)
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outfile.close()
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else:
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with open(csv_name, 'w+') as outfile:
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writer = csv.writer(outfile)
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writer.writerow(rowheadings)
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writer.writerows(matrix)
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outfile.close()
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