rmc.java

国外的一个开源gps模拟器源代码

/*
 * Copyright (c) 2007 by the University of Applied Sciences Northwestern Switzerland (FHNW)
 * 
 * This program can be redistributed or modified under the terms of the
 * GNU General Public License as published by the Free Software Foundation.
 * This program is distributed without any warranty or implied warranty
 * of merchantability or fitness for a particular purpose.
 *
 * See the GNU General Public License for more details.
 */

package ch.fhnw.imvs.gpssimulator.nmea;

import ch.fhnw.imvs.gpssimulator.data.GPSData;

public class RMC extends NMEASentence {

	@Override
	public String getName() { return "GPRMC"; }

	@Override
	public String getSentence(boolean content) {
		String sentence;
		if (content) {
			String ns = GPSData.getNS().name().substring(0,1);
			String ew = GPSData.getEW().name().substring(0,1);

			StringBuffer buf = new StringBuffer(getName());
			append(buf, getTimestamp());			// time position is taken in UTC
			append(buf, GPSData.getStatus().name()); 		// A=OK, V=warning
			append(buf, NMEASentence.getNMEALatitude()); 	// in degree
			append(buf, ns); 
			append(buf, NMEASentence.getNMEALongitude()); 
			append(buf, ew); 
			append(buf, GPSData.getSpeed());		// speed over ground in knots
			append(buf, GPSData.getCourse()); 		// track angle in degrees
			append(buf, getDatestamp());			// date
			append(buf, "");						// declination (degree)
			append(buf, "");						// declination (orientation)
			append(buf, GPSData.getMode().name().substring(0,1));
												// mode indicator (A,D,E,N,S) [since release 2.3]
												// A=autonomous, D=differential, E=Estimated, N=not valid, S=Simulator
			sentence = buf.toString();
		} 
		else {
			sentence = ("GPRMC," + getTimestamp() + ",V,,,,,,,,,,");
		}
		return sentence;
	}

}