Page Comparison

...

• loc_1 (174.3120, -41.2200)

• loc_2 (174.3212, -41.2134)

• loc_3 (174.3185, -41.2116)

• loc_4 (174.3148, -41.2102)

• loc_5 (174.3106, -41.2098)

• loc_6 (174.3065, -41.2103)

• loc_7 (174.3031, -41.2113)

• loc_8 (174.2763, -41.2261)

• loc_9 (174.2552, -41.2397)

• loc_10 (174.2262, -41.2409)

• loc_11 (174.2011, -41.2405)

• loc_12 (174.1796, -41.2456)

• loc_13 (174.1604, -41.2473)

• loc_14 (174.1546, -41.2386)

• loc_15 (174.1526, -41.2300)

JSON Format

A JSON packet is produced once every ten minutes, with a 30 minute delay, and uploaded to the Council’s data lake:

• timestamp is in UTC

• lat/lon are in WGS84 decimal degree format

• height is Surface elevation above MSL in meters

• east_velocity is Eastward surface current velocity in m/s

• north_velocity is Northward surface current velocity in m/s

• measurement_id is unique for every ten minute period

JSON format example:

{
  "'loc_name"': "'tory_loc_15"',
  "'timestamp"': "'2022-0607-21T2308T07:1040:00Z"', 
 "'lat"': -41.23, 
 "'lon"': 174.1526, 
 "'height"': -0.01920500447783849004463135070520845, 
 "'east_velocity"': -0.012238884344696999014527322724461555, 
 "'north_velocity"': 0.045555416494607925, 
 'current_direction_true': 342.31, 
 'current_direction_magnetic': 319.81, 
 'current_speed_knots': 0.2878053784370422409, 
 "'measurement_id"': "b5b629d5f71990b5f278854793128449"
} '6cc86cb02f1d85bed2b35a1e9210892c'
 }

NMEA Format

One sentence type is produced. Each sentence is followed by a CR/LF. Sentences contain:

• Current direction in degrees True North (“T”)

• Current direction in degrees Magnetic North (“M”)

• Current speed in knots (“N”)

NMEA format sentence example:

$VDR,126.69,T,104.19,M,00.05,N,*17

One TCP port is provided for each location, with ports ranging from 12101-12115 and the last two digits of the port number corresponding with the location ids above.