SPP

select_epo.h

@@ -0,0 +1,31 @@
+#ifndef _SELECT_EPO_H_
+#define _SELECT_EPO_H_
+
+#include<stdio.h>
+#include<math.h>
+
+#include"read.h"
+
+//挑选合适的星历
+extern int select_epoch(double SecofWeek, int sPRN, pnav_body nav_b, int gps_satnum)
+{
+	int best_epoch = 0;
+	double min=10000;//假设最小值是1万秒
+	double Min;
+	int i;
+	for (i = 0; i < gps_satnum; i++)
+	{
+		if (sPRN == nav_b[i].sPRN)
+		{
+			Min = fabs(SecofWeek - nav_b[i].TOE);
+			if (Min <= min)
+			{
+				best_epoch = i;
+				min = Min;
+			}
+		}
+	}
+	return best_epoch;
+}
+
+#endif