[773] | 1 | /* -------------------------------------------------------------------------
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| 2 | * BKG NTRIP Server
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| 3 | * -------------------------------------------------------------------------
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| 4 | *
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| 5 | * Class: bncutils
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| 6 | *
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| 7 | * Purpose: Auxiliary Functions
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| 8 | *
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| 9 | * Author: L. Mervart
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| 10 | *
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| 11 | * Created: 08-Apr-2008
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| 12 | *
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| 13 | * Changes:
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| 14 | *
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| 15 | * -----------------------------------------------------------------------*/
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| 16 |
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| 17 | #include <iostream>
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| 18 | #include <ctime>
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| 19 | #include <math.h>
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| 20 |
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| 21 | #include <QRegExp>
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| 22 | #include <QStringList>
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| 23 | #include <QDateTime>
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| 24 |
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| 25 | #include "bnsutils.h"
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[798] | 26 | #include "bnseph.h"
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[773] | 27 |
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| 28 | using namespace std;
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| 29 |
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| 30 | //
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| 31 | ////////////////////////////////////////////////////////////////////////////
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| 32 | void expandEnvVar(QString& str) {
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| 33 |
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| 34 | QRegExp rx("(\\$\\{.+\\})");
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| 35 |
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| 36 | if (rx.indexIn(str) != -1) {
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| 37 | QStringListIterator it(rx.capturedTexts());
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| 38 | if (it.hasNext()) {
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| 39 | QString rxStr = it.next();
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| 40 | QString envVar = rxStr.mid(2,rxStr.length()-3);
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| 41 | str.replace(rxStr, qgetenv(envVar.toAscii()));
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| 42 | }
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| 43 | }
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| 44 |
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| 45 | }
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| 46 |
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| 47 | //
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| 48 | ////////////////////////////////////////////////////////////////////////////
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| 49 | QDateTime dateAndTimeFromGPSweek(int GPSWeek, double GPSWeeks) {
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| 50 |
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| 51 | static const QDate zeroEpoch(1980, 1, 6);
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| 52 |
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| 53 | QDate date(zeroEpoch);
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| 54 | QTime time(0,0,0,0);
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| 55 |
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| 56 | int weekDays = int(GPSWeeks) / 86400;
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| 57 | date = date.addDays( GPSWeek * 7 + weekDays );
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| 58 | time = time.addMSecs( int( (GPSWeeks - 86400 * weekDays) * 1e3 ) );
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| 59 |
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[921] | 60 | return QDateTime(date,time,Qt::UTC);
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[773] | 61 | }
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| 62 |
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| 63 | //
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| 64 | ////////////////////////////////////////////////////////////////////////////
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| 65 | void GPSweekFromDateAndTime(const QDateTime& dateTime,
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| 66 | int& GPSWeek, double& GPSWeeks) {
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| 67 |
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[921] | 68 | static const QDateTime zeroEpoch(QDate(1980, 1, 6),QTime(),Qt::UTC);
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[774] | 69 |
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| 70 | GPSWeek = zeroEpoch.daysTo(dateTime) / 7;
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[773] | 71 |
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[775] | 72 | int weekDay = dateTime.date().dayOfWeek() + 1; // Qt: Monday = 1
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| 73 | if (weekDay > 7) weekDay = 1;
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| 74 |
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| 75 | GPSWeeks = (weekDay - 1) * 86400.0
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[774] | 76 | - dateTime.time().msecsTo(QTime()) / 1e3;
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[773] | 77 | }
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| 78 |
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| 79 | //
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| 80 | ////////////////////////////////////////////////////////////////////////////
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| 81 | void currentGPSWeeks(int& week, double& sec) {
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| 82 |
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| 83 | QDateTime currDateTime = QDateTime::currentDateTime().toUTC();
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| 84 | QDate currDate = currDateTime.date();
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| 85 | QTime currTime = currDateTime.time();
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| 86 |
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| 87 | week = int( (double(currDate.toJulianDay()) - 2444244.5) / 7 );
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| 88 |
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| 89 | sec = (currDate.dayOfWeek() % 7) * 24.0 * 3600.0 +
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| 90 | currTime.hour() * 3600.0 +
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| 91 | currTime.minute() * 60.0 +
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| 92 | currTime.second() +
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| 93 | currTime.msec() / 1000.0;
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| 94 | }
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[798] | 95 |
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[860] | 96 | //
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| 97 | ////////////////////////////////////////////////////////////////////////////
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| 98 | void mjdFromDateAndTime(const QDateTime& dateTime, int& mjd, double& dayfrac) {
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| 99 |
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[861] | 100 | const static QDate zeroDate(1858, 11, 17);
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[860] | 101 |
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[861] | 102 | mjd = zeroDate.daysTo(dateTime.date());
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| 103 |
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| 104 | dayfrac = (dateTime.time().hour() +
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| 105 | (dateTime.time().minute() +
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| 106 | (dateTime.time().second() +
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| 107 | dateTime.time().msec() / 1000.0) / 60.0) / 60.0) / 24.0;
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[860] | 108 | }
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| 109 |
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[804] | 110 | // Transformation xyz --> radial, along track, out-of-plane
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| 111 | ////////////////////////////////////////////////////////////////////////////
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| 112 | void XYZ_to_RSW(const ColumnVector& rr, const ColumnVector& vv,
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| 113 | const ColumnVector& xyz, ColumnVector& rsw) {
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| 114 |
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| 115 | ColumnVector cross = crossproduct(rr, vv);
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| 116 |
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| 117 | rsw.ReSize(3);
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| 118 | rsw(1) = DotProduct(xyz, rr) / rr.norm_Frobenius();
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| 119 | rsw(2) = DotProduct(xyz, vv) / vv.norm_Frobenius();
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| 120 | rsw(3) = DotProduct(xyz, cross) / cross.norm_Frobenius();
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| 121 | }
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[884] | 122 |
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| 123 | // Fourth order Runge-Kutta numerical integrator for ODEs
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| 124 | ////////////////////////////////////////////////////////////////////////////
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| 125 | ColumnVector rungeKutta4(
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| 126 | double xi, // the initial x-value
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| 127 | const ColumnVector& yi, // vector of the initial y-values
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| 128 | double dx, // the step size for the integration
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| 129 | ColumnVector (*der)(double x, const ColumnVector& y)
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| 130 | // A pointer to a function that computes the
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| 131 | // derivative of a function at a point (x,y)
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| 132 | ) {
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| 133 |
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| 134 | ColumnVector k1 = der(xi , yi ) * dx;
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| 135 | ColumnVector k2 = der(xi+dx/2.0, yi+k1/2.0) * dx;
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| 136 | ColumnVector k3 = der(xi+dx/2.0, yi+k2/2.0) * dx;
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| 137 | ColumnVector k4 = der(xi+dx , yi+k3 ) * dx;
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| 138 |
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| 139 | ColumnVector yf = yi + k1/6.0 + k2/3.0 + k3/3.0 + k4/6.0;
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| 140 |
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| 141 | return yf;
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| 142 | }
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