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Picton Harbours maintains two three wave buoys in the Marlborough Sounds.

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• Northern Entrance / Kokomahua Islands (-41.093092°, 174.319968°)

• Tory Entrance / East Head (-41.203310°, 174.349820°)

• Tory Entrance / East Head (-41.203558°, 174.342595°)

Data is stored in a data warehouse and provided to partner organisations. Partner feeds are available as NMEA via a UDP stream or TCP server or as JSON.

The two the three buoys have different types of data and different update periods.

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{
  "sensor_id": "pcn.ne_buoy.svs_603.1",
  "timestamp": "2022-03-03T21:21:00Z",
  "measurement_id": "896d3d3c7a530aea77decebdfa86a64b",
  "hsig": 0.189,
  "pdom": 6.557,
  "pavg": 6.557,
  "mwd": 49.81,
  "hmax": 0.305,
  "hmax2": 0.24,
  "pmax": 11.13,
  "pitch": -1.028,
  "roll": 0.886
 }

Tory Entrance Seaview

The sensor types are:

• D = Linear Displacement

• F = Frequency

• A = Angular Displacement

The units are:

• M = Meters

• S = Seconds

• D = Degrees

The sensor names are:

• HSIG = Significant Wave Height

• HMAX = Max Wave Height 1

• HMAX2 = Max Wave Height 2

• PDOM = Dominant Wave Period

• PAVG = Average Wave Period

• PMAX = Maximum Wave Period

• MWD = Mean Wave Direction

• PITCH = Pitch

• ROLL = Roll

For NMEA service, two sentences are produced each minute. New data is provided with each transmission. Each sentence is followed by a CR/LF.

NMEA format sentence example, available on port 45055:

$WIXDR,D,0.472,M,HSIG,F,10.377,S,PDOM,F,7.089,S,PAVG,A,175.133,D,MWD*36
$WIXDR,D,0.694,M,HMAX,D,0.600,M,HMAX2,F,12.540,S,PMAX*62

JSON format example:

{
  "sensor_id": "pcn.tory_seaview.svs_603.1",
  "timestamp": "2022-03-03T21:21:00Z",
  "measurement_id": "896d3d3c7a530aea77decebdfa86a64b",
  "hsig": 0.189,
  "pdom": 6.557,
  "pavg": 6.557,
  "mwd": 49.81,
  "hmax": 0.305,
  "hmax2": 0.24,
  "pmax": 11.13,
  "pitch": -1.028,
  "roll": 0.886
 }

Tory Entrance Waverider (NIWA)

The sensor types are:

• D = Linear Displacement

• F = Frequency

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