uk.org.funcube.fcdw.service.PredictorService.java Source code

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Here is the source code for uk.org.funcube.fcdw.service.PredictorService.java

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// FUNcube Data Warehouse
// Copyright 2013 (c) David A.Johnson, G4DPZ, AMSAT-UK
// This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
// To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter
// to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.

package uk.org.funcube.fcdw.service;

import java.text.NumberFormat;
import java.util.Date;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;

import uk.org.funcube.fcdw.dao.TleDao;
import uk.org.funcube.fcdw.domain.TleEntity;
import uk.org.funcube.fcdw.domain.UserEntity;
import uk.org.funcube.fcdw.satellite.GroundStationPosition;
import uk.org.funcube.fcdw.satellite.SatPos;
import uk.org.funcube.fcdw.satellite.Satellite;
import uk.org.funcube.fcdw.satellite.SatelliteFactory;
import uk.org.funcube.fcdw.satellite.TLE;
import uk.org.funcube.fcdw.server.shared.SatellitePosition;

public class PredictorService {

    @Autowired
    TleDao tleDao;

    @Transactional(readOnly = true)
    public SatellitePosition get(Long catnum, Date instant) {
        return get(catnum, instant, new GroundStationPosition(0.0, 0.0, 200.0));
    }

    public SatellitePosition get(Long catnum, Date instant, GroundStationPosition groundStationPosition) {

        SatellitePosition position = null;

        List<TleEntity> tleEntities = tleDao.findByCatnum(catnum);

        if (!tleEntities.isEmpty()) {
            final TleEntity tleEntity = tleEntities.get(0);
            final TLE tle = new TLE(tleEntity.getCatnum(), tleEntity.getName(), tleEntity.getSetnum(),
                    tleEntity.getYear(), tleEntity.getRefepoch(), tleEntity.getIncl(), tleEntity.getRaan(),
                    tleEntity.getEccn(), tleEntity.getArgper(), tleEntity.getMeanan(), tleEntity.getMeanmo(),
                    tleEntity.getDrag(), tleEntity.getNddot6(), tleEntity.getBstar(), tleEntity.getOrbitnum(),
                    tleEntity.getEpoch(), tleEntity.getXndt2o(), tleEntity.getXincl(), tleEntity.getXnodeo(),
                    tleEntity.getEo(), tleEntity.getOmega(), tleEntity.getMo(), tleEntity.getXno(),
                    tleEntity.isDeepspace(), tleEntity.getCreateddate());

            Satellite satellite = SatelliteFactory.createSatellite(tle);

            satellite.calculateSatelliteVectors(instant);
            satellite.calculateSatelliteGroundTrack();

            SatPos satPos = satellite.calculateSatPosForGroundStation(groundStationPosition);

            final NumberFormat numberFormat = NumberFormat.getNumberInstance();
            numberFormat.setMaximumFractionDigits(2);

            position = new SatellitePosition(numberFormat.format(satPos.getLatitude() / (Math.PI * 2.0) * 360),
                    numberFormat.format(satPos.getLongitude() / (Math.PI * 2.0) * 360),
                    satPos.isEclipsed() ? "yes" : "no", numberFormat.format(satPos.getEclipseDepth()),
                    satPos.isAboveHorizon());
        }

        return position;
    }

}