ais-json-english

ais-json-english

A npm package about AIS (Automatic Identification System) text decoding.

Originally forked from

Decode AIS text, then return JSON object.

npm address:

Structure

| Name | Description |
| -------------- | ------------------------------------------------------------------------------ |
| index.js | main function (call decode.js and include verify ais text) |
| encode.js | generate ascii6bit.json and num2char.json |
| decode.js | decode ais text and return json (base on ascii6bit.json and num2char.json) |
| ascii6bit.json | connect ascii to 6 bit code |
| num2char.json | connect number to char |

Install

``sh
npm install ais-json-english
`

Usage

In Terminal

`sh
npx ais '!AIVDM,1,1,,A,15Cgah00008LOnt>1Cfs6NT00SU,0*3D'
``

Then, you will get:

`json
{
"MessageID": {
"name": "MessageID",
"data": 1,
"info": "Ship Position Report"
},
"DataIndicator": {
"name": "Forward Indicator",
"data": 0,
"info": "Default"
},
"UserID": {
"name": "UserID(MMSI)",
"data": 356248000,
"info": 356248000
},
"NaviStatus": {
"name": "NavStatus",
"data": 0,
"info": "Under way using Engine"
},
"ROT": {
"name": "ROT",
"data": "0°/min",
"info": "0°/min"
},
"SOG": {
"name": "SOG",
"data": "0 section",
"info": "0 section"
},
"Accuracy": {
"name": "Accuracy",
"data": 0,
"info": "High(<10m)"
},
"Location": {
"name": "Coordinate",
"data": [118.07354333333333, 24.502496666666666],
"info": "E 118°4.4126′ , N 24°30.1498′"
},
"COG": {
"name": "COG",
"data": "228.4°",
"info": "228.4°"
},
"Heading": {
"name": "HDT",
"data": "207°",
"info": "207°"
},
"Second": {
"name": "timestamp",
"data": 18,
"info": "18 seconds past the minute"
},
"RegionalApplication": {
"name": "specific indicator",
"data": 0,
"info": "Unavailable"
},
"Spare": {
"name": "spare",
"data": 0,
"info": "Unused"
},
"RAIM": {
"name": "RAIM",
"data": 0,
"info": "RAIM not used"
},
"CommunicationState": {
"name": "CommStatus",
"data": "0000000100011100101",
"info": "SOTDMA 4:57 UTC"
},
"text": "!AIVDM,1,1,,A,15Cgah00008LOnt>1Cfs6NT00SU,0*3D"
}
``

In Project

$3

`sh


const ais = require('ais-json-english')


import ais from 'ais-json-english'
let aisinfo = ais('!AIVDM,1,1,,A,15Cgah00008LOnt>1Cfs6NT00SU,0*3D')
``

$3

If you need it.

node-serialport

`sh
cd ais-json-english
node serialport
`

#### Default

Port: COM3
BaudRate: 38400

$3

`sh
cd ais-json-english
node encode
`

Generate ascii6bit.json and num2char.json`.

Intend

- [ ] CLI