com.github.amsacode.predict4java

Class PassPredictor

java.lang.Object

com.github.amsacode.predict4java.PassPredictor

public class PassPredictor
extends Object

Class which provides Pass Prediction.

Author:

David A. B. Johnson, g4dpz

Constructor Summary

Constructors

Constructor and Description
PassPredictor(TLE theTLE, GroundStationPosition theQTH) Constructor.

Method Summary

Modifier and Type	Method and Description
Long	getDownlinkFreq(Long freq, Date date) Gets the downlink frequency corrected for doppler.
List<SatPassTime>	getPasses(Date start, int hoursAhead, boolean windBack) Gets a list of SatPassTime
List<SatPos>	getPositions(Date referenceDate, int incrementSeconds, int minutesBefore, int minutesAfter) Calculates positions of satellite for a given point in time, time range and step increment.
SatPos	getSatPos(Date time)
Long	getUplinkFreq(Long freq, Date date)
SatPassTime	nextSatPass(Date date)
SatPassTime	nextSatPass(Date date, boolean windBack)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PassPredictor

public PassPredictor(TLE theTLE,
                     GroundStationPosition theQTH)
              throws IllegalArgumentException,
                     SatNotFoundException

Constructor.

Parameters:

tle - the Three Line Elements

qth - the ground station position

Throws:

IllegalArgumentException - bad argument passed in

SatNotFoundException

Method Detail

getDownlinkFreq

public Long getDownlinkFreq(Long freq,
                            Date date)
                     throws SatNotFoundException

Gets the downlink frequency corrected for doppler.

Parameters:

freq - the original frequency in Hz

Returns:

the doppler corrected frequency in Hz

Throws:

InvalidTleException - bad TLE passed in

SatNotFoundException

getSatPos

public SatPos getSatPos(Date time)
                 throws SatNotFoundException

Throws:

SatNotFoundException

getUplinkFreq

public Long getUplinkFreq(Long freq,
                          Date date)
                   throws SatNotFoundException

Throws:

SatNotFoundException

nextSatPass

public SatPassTime nextSatPass(Date date)
                        throws SatNotFoundException

Throws:

SatNotFoundException

nextSatPass

public SatPassTime nextSatPass(Date date,
                               boolean windBack)
                        throws SatNotFoundException

Throws:

SatNotFoundException

getPasses

public List<SatPassTime> getPasses(Date start,
                                   int hoursAhead,
                                   boolean windBack)
                            throws SatNotFoundException

Gets a list of SatPassTime

Parameters:

start - Date newTLE = true; validateData();

end - Date

firstAosLimit - in hours

Returns:

List

Throws:

SatNotFoundException

InvalidTleException

getPositions

public List<SatPos> getPositions(Date referenceDate,
                                 int incrementSeconds,
                                 int minutesBefore,
                                 int minutesAfter)
                          throws SatNotFoundException

Calculates positions of satellite for a given point in time, time range and step increment.

Parameters:

referenceDate -

incrementSeconds -

minutesBefore -

minutesAfter -

Returns:

list of SatPos

Throws:

SatNotFoundException

InvalidTleException