70 lines
1.6 KiB
Dart
70 lines
1.6 KiB
Dart
// ignore_for_file: constant_identifier_names
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import 'parser.dart';
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import 'sentence.dart';
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const TypeGSV = "GSV";
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class GSV {
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int totalMessages;
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int messageNumber;
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int numberSVsInView;
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List<GSVInfo> info;
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int systemID;
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int signalID;
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GSV(
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{required this.totalMessages,
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required this.messageNumber,
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required this.numberSVsInView,
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required this.info,
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required this.systemID,
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required this.signalID});
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static GSV newGSV(BaseSentence s) {
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var p = Parser(s);
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var gsv = GSV(
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totalMessages: p.int64(0, "total number of messages"),
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messageNumber: p.int64(1, "message number"),
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numberSVsInView: p.int64(2, "number of SVs in view"),
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info: [],
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systemID: 0,
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signalID: 0,
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);
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int i = 0;
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for (; i < 4; i++) {
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if (6 + i * 4 >= s.fields.length) {
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break;
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}
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gsv.info.add(GSVInfo(
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svprnNumber: p.int64(3 + i * 4, "SV prn number"),
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elevation: p.int64(4 + i * 4, "elevation"),
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azimuth: p.int64(5 + i * 4, "azimuth"),
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snr: p.int64(6 + i * 4, "SNR"),
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));
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}
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var idxSID = (6 + (i - 1) * 4) + 1;
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if (s.fields.length == idxSID + 2) {
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gsv.systemID = p.int64(idxSID, "system ID");
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gsv.signalID = p.int64(idxSID + 1, "signal ID");
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}
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if (s.fields.length == idxSID + 1) {
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gsv.signalID = p.int64(idxSID, "signal ID");
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}
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return gsv;
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}
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}
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class GSVInfo {
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int svprnNumber;
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int elevation;
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int azimuth;
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int snr;
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GSVInfo(
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{required this.svprnNumber,
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required this.elevation,
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required this.azimuth,
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required this.snr});
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}
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