public AisMessage CreateMessage(BitArray payload)
{
var type = payload.DecodeByte(0, 5);
if (type != c_type1 && type != c_type2 && type != c_type3)
{
throw new Exception(string.Format("Incorrect type, expected 1,2,3 but present:{0}", type));
}
var timeStamp = DateTime.UtcNow.ToFileTimeUtc();
byte repeatIndicator = payload.DecodeByte(6, 7);
uint mmsi = payload.DecodeUInt32(8, 37);
NavigationStatus navStatus = (NavigationStatus)payload.DecodeByte(38, 41);
int rot = payload.DecodeInt32(42, 49);
float sog = (float)payload.DecodeUInt32(50, 59) / 10;
bool posAccuracy = payload.DecodeBool(60);
float longtitude = (float)payload.DecodeFloat(61, 88) / 600000;
float latitude = (float)payload.DecodeFloat(89, 115) / 600000;
float cog = (float)payload.DecodeUInt32(116, 127) / 10;
ushort heading = payload.DecodeUShort(128, 136);
byte utcSeconds = payload.DecodeByte(137, 142);
ManeuverIndicator manuevrIndicator = (ManeuverIndicator)payload.DecodeByte(143, 144);
byte spare = payload.DecodeByte(145, 147);
bool raim = payload.DecodeBool(148);
uint radioStatus = payload.DecodeUInt32(149, 167);
return(new ClassAPositionReportMessage(
type,
timeStamp,
repeatIndicator,
mmsi,
navStatus,
rot,
sog,
posAccuracy,
longtitude,
latitude,
cog,
heading,
utcSeconds,
manuevrIndicator,
spare,
raim,
radioStatus));
}
