Changeset 891 in ntrip

Timestamp:

May 8, 2008, 5:27:36 PM (17 years ago)

Author:

mervart

Message:

* empty log message *

Location:

trunk/BNS

Files:

• bnseph.cpp (modified) (1 diff)
• bnseph.h (modified) (1 diff)

trunk/BNS/bnseph.cpp

@@ -348 +348 @@
                         ColumnVector& vv) const {
 
-}
-
+  const static double secPerWeek = 7 * 86400.0;
+
+  double dt = GPSweeks - _tt;
+  if (GPSweek != _GPSweek) {  
+    dt += (GPSweek - _GPSweek) * secPerWeek;
+  }
+
+  const static double maxStep = 10.0;
+
+  double tt = 0.0;
+  while (tt < dt) {
+    double step = maxStep;
+    if (tt + step > dt) {
+      step = dt - tt;
+    }
+    _xv = rungeKutta4(tt, _xv, step, glo_deriv);
+    tt += step;
+  }
+
+  xc(1) = _xv(1);
+  xc(2) = _xv(2);
+  xc(3) = _xv(3);
+
+  xc(4) = 0.0;
+  
+  vv(1) = _xv(4);
+  vv(2) = _xv(5);
+  vv(3) = _xv(6);
+}
+

trunk/BNS/bnseph.h

@@ -38 +38 @@
  private:
   static ColumnVector glo_deriv(double /* tt */, const ColumnVector& xv);
-  double       _tt;  // time in seconds of GPSweek
-  ColumnVector _xv;  // status vector (position, velocity) at time _tt
+  mutable double       _tt;  // time in seconds of GPSweek
+  mutable ColumnVector _xv;  // status vector (position, velocity) at time _tt
 
   double _E;                  // [days]