   if ( gpsMsgFlg ) updateGPSMsg();
   if ( gpsZDAFlg ) procZDAMsg();
   if ( gpsTFFlg ) procTFMsg();
-  if ( !cmdBufCurrent ) updateCmdBuffer();
-  if ( Serial.available() ) getTermByte();
+//  if ( !cmdBufCurrent ) updateCmdBuffer();
+//  if ( Serial.available() ) getTermByte();
   if ( Serial1.available() ) getAPRSByte();
   if ( Serial2.available() ) getGPSByte();
   if ( !aprsBufCurrent ) updateAPRSBuffer();

    aprsNewFlg = false;
  }

  // Update target state 
  if ( targetValid ) {
    long temp = targetTime; // old time, same as lastAprsTime??
    targetTime = now(); 
    temp = targetTime - temp; // delta t
    targetLon += ( targetVlon * deltaT );
    targetLat += ( targetVlat * deltaT );
    targetAlt += ( targetValt * deltaT );


void procZDAMsg() {
  Serial.println( gpsZDA );
  String utc = getField( gpsZDA, 1, ',' );
  if ( utc.length() > 0 ) {
    gpsHr = utc.substring( 0,2 ).toInt();
    gpsMin = utc.substring( 2,4 ).toInt();
    gpsSec = utc.substring( 4,6 ).toInt();
    gpsDay = getField( gpsZDA, 2, ',' ).toInt();
    gpsMon = getField( gpsZDA, 3, ',' ).toInt();
    gpsYr = getField( gpsZDA, 4, ',' ).toInt();
    gpsTimeFlg = true;
  }
  gpsZDAFlg = false;
}

 void procTFMsg() {
    // Need UTC offset with at least 2D fix for valid time sync
