@jbroll/nmea-simple
Version:
NMEA 0183 sentence parser and encoder
49 lines (48 loc) • 2.18 kB
JavaScript
;
/*
* === RMC - Recommended minimum navigation information ===
*
* ------------------------------------------------------------------------------
* 12
* 1 2 3 4 5 6 7 8 9 10 11| 13
* | | | | | | | | | | | | |
* $--RMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,ddmmyy,x.x,a,m,*hh<CR><LF>
* ------------------------------------------------------------------------------
*
* Field Number:
* 1. UTC Time
* 2. Status
* A = Valid
* V = Navigation receiver warning
* 3. Latitude
* 4. N or S
* 5. Longitude
* 6. E or W
* 7. Speed over ground, knots
* 8. Track made good, degrees true
* 9. Date, ddmmyy
* 10. Magnetic Variation, degrees
* 11. E or W
* 12. FAA mode indicator (NMEA 2.3 and later)
* 13. Checksum
*/
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
Object.defineProperty(exports, "__esModule", { value: true });
var helpers_1 = require("../helpers");
var PacketStub_1 = require("./PacketStub");
exports.sentenceId = "RMC";
exports.sentenceName = "Recommended minimum navigation information";
function decodeSentence(stub, fields) {
return __assign(__assign({}, PacketStub_1.initStubFields(stub, exports.sentenceId, exports.sentenceName)), { datetime: helpers_1.parseTime(fields[1], fields[9], true), status: fields[2] === "A" ? "valid" : "warning", latitude: helpers_1.parseLatitude(fields[3], fields[4]), longitude: helpers_1.parseLongitude(fields[5], fields[6]), speedKnots: helpers_1.parseFloatSafe(fields[7]), trackTrue: helpers_1.parseFloatSafe(fields[8]), variation: helpers_1.parseFloatSafe(fields[10]), variationPole: fields[11] === "E" ? "E" : fields[11] === "W" ? "W" : "", faaMode: fields[12] });
}
exports.decodeSentence = decodeSentence;