This packet decodes Asterix messages

Features

Can decode Asterix messages in categories 34 and 48. We're working in support for cat 8, 1 and 2.

Getting started

Download the package and import as follow:

import 'package:asterix/asterix.dart';
import 'package:asterix/src/asterix34.dart';
import 'package:asterix/src/asterix48.dart';

void main() {
  final asterixDecoder = AsterixDecoder();
  // Read asterix file
  final file = File('rec_bin_001.bin',); // only asterix payload, don't suport .pcap
  final stream = await file.readAsBytes();
  // Read lenght fields of the first asterix packet
  final length = stream[1] * 256 + stream[2];
  asterixPacket = stream.sublist(0, length);
  Asterix asterixInfo = asterixDecoder.fromBinary(asterixPacket);


}

Usage

this example demonstrates the usage for decode asterix 34 service messages

if (asterixInfo.category == 34) {
    final packet = asterixInfo as Asterix34;
    if (packet.antennaRotationPeriod != null) {
        print(packet.antennaRotationPeriod);
    }
    if (packet.sectorNumber != null) {
        final deltaTheta =
            (packet.sectorNumber! != 0.0
                ? packet.sectorNumber!
                : 360.0) -
            lastSector;
        final deltaTime = packet.timeOfDay! - lastTimeSector;
        print("${packet.sectorNumber} ->  ${deltaTheta / deltaTime}");
        lastSector = packet.sectorNumber!;
        lastTimeSector = packet.timeOfDay!;
    }
}

The fields on class Asterix subclasses can be null or a value depending the info. Null values meaning no information.

Additional information

For more information about this package, visit the official repository. Here, you can find detailed documentation, examples, and updates.

Contributing

We welcome contributions! If you'd like to contribute, please check out our contribution guidelines. Whether it's reporting bugs, suggesting features, or submitting pull requests, your input is valuable.

Filing Issues

If you encounter any issues or have questions, please file an issue on our GitHub Issues page. We aim to respond within 48 hours.

Support

For additional support, feel free to reach out via the discussions page. Our team and community are here to help.

Thank you for using the Asterix Decoder package!