Update:

1.KNZ_Calculate: modified some mistake and
optimize the use experience.
2.KNZ_Plot: more selective options and more united
style of GUI

headers/cal_mod.h

@@ -93,6 +93,10 @@ void sat_gps_pos_clac(FILE* result_file,HWND hwndPB,
         fprintf(result_file, "@ GENERATE TIME      : %s", ctime(&gen_time));
         fprintf(result_file, "@ OBS FILE PATH      : %s\n", obs_file);
         fprintf(result_file, "@ NAV FILE PATH      : %s\n", nav_file);
+        fprintf(result_file, "@ TIME OF FIRST OBS  : %4d %02d %02d %02d %02d %07.4f\n"
+            , obs_h->f_y, obs_h->f_m, obs_h->f_d, obs_h->f_h, obs_h->f_min, obs_h->f_sec);
+        fprintf(result_file, "@ TIME OF LAST OBS   : %4d %02d %02d %02d %02d %07.4f\n"
+            , obs_h->l_y, obs_h->l_m, obs_h->l_d, obs_h->l_h, obs_h->l_min, obs_h->l_sec);
         fprintf(result_file, "@ APPROX POSITION XYZ: %13.04f%13.04f%13.04f\n@ APPROX POSITION BLH:  %12.07f %12.07f %12.07f\n"
             , obs_h->apX, obs_h->apY, obs_h->apZ
             , station.B, station.L, station.H);
@@ -102,12 +106,11 @@ void sat_gps_pos_clac(FILE* result_file,HWND hwndPB,
         if (trooption == 1) { fprintf(result_file, "@ TROPO OPT          : DEFAULT\n@\n\n"); }
         fclose(result_file);
 
+        double beginsec = Time2GPSsec(obs_h->f_y, obs_h->f_m, obs_h->f_d, obs_h->f_h, obs_h->f_min, obs_h->f_sec);
+        double endinsec = Time2GPSsec(obs_h->l_y, obs_h->l_m, obs_h->l_d, obs_h->l_h, obs_h->l_min, obs_h->l_sec);
+
         for (int i = 0; i < o_epochnum; i++)
         {
-            result_file = fopen(res_file, "a+");
-            fprintf(result_file, "\n>%04d %04d %02d %02d %02d %02d %07.04f", i + 1, obs_e[i].y, obs_e[i].m, obs_e[i].d, obs_e[i].h, obs_e[i].min, obs_e[i].sec);
-            fclose(result_file);
-
             int y = obs_e[i].y;
             int m = obs_e[i].m;
             int d = obs_e[i].d;
@@ -125,9 +128,17 @@ void sat_gps_pos_clac(FILE* result_file,HWND hwndPB,
             enus enu = { 0 };
             rahs rah = { 0 };
             pos_ts pos_t = { 0 };
+
+            double GPSsec = Time2GPSsec(y, m, d, h, min, sec);//转换为GPS周内秒
+            int epochsignal = round((GPSsec - beginsec) / obs_h->interval) + 1;
+
+            result_file = fopen(res_file, "a+");
+            fprintf(result_file, "\n>%04d %04d %02d %02d %02d %02d %07.04f"
+                , epochsignal, obs_e[i].y, obs_e[i].m, obs_e[i].d, obs_e[i].h, obs_e[i].min, obs_e[i].sec);
+            fclose(result_file);
+
             for (int j = 0; j < obs_e[i].gps_num; j++)//第j颗GPS卫星
             {
-                double GPSsec = Time2GPSsec(y, m, d, h, min, sec);//转换为GPS周内秒
                 int sPRN = obs_e[i].sPRN_GPS[j];
                 int best_epoch = select_epoch(GPSsec, sPRN, nav_b, satnum, GPS); //遍历N文件GPS卫星数据块，寻找最佳历元
                 double detat_toc = GPSsec - nav_b[best_epoch].TOE;//观测时刻 - 参考时刻

headers/public.h

@@ -84,6 +84,8 @@
 
 /* ------------------------------ FOR CALMOD.H ------------------------------ */
 #define MAXRINEX 1000
+#define DAYSEC	 86400
+
     //卫星位置结构体
     typedef struct
     {
@@ -232,6 +234,12 @@ typedef struct obs_head
 	int f_h;
 	int f_min;
 	double f_sec;
+	int l_y;
+	int l_m;
+	int l_d;
+	int l_h;
+	int l_min;
+	double l_sec;
 	char tsys[5];//时间系统
 }obs_head,*pobs_head;
 

headers/read.h

@@ -57,6 +57,9 @@ extern int get_epochnum(FILE* fp_obs)
 /* -------------------------------- 读取O文件数据头 -------------------------------- */
 extern void read_o_h(FILE* fp_obs, pobs_head obs_h)
 {
+	obs_h->f_y = obs_h->f_m = obs_h->f_d = obs_h->f_h = obs_h->f_min = obs_h->f_sec = 0;
+	obs_h->l_y = obs_h->l_m = obs_h->l_d = obs_h->l_h = obs_h->l_min = obs_h->l_sec = 0;
+	obs_h->interval = 30;
 	memset(obs_h->obscode_gps, 0, sizeof(obs_h->obscode_gps));
 	memset(obs_h->obscode_bds, 0, sizeof(obs_h->obscode_bds));
 	char buff[MAXRINEX] = { 0 };
@@ -155,6 +158,16 @@ extern void read_o_h(FILE* fp_obs, pobs_head obs_h)
 			strncpy(obs_h->tsys, buff + 6 + 6 + 6 + 6 + 6 + 18, 3);
 			continue;
 		}
+		else if (strstr(lable, "TIME OF LAST OBS"))
+		{
+			obs_h->l_y = (int)strtonum(buff, 2, 4);
+			obs_h->l_m = (int)strtonum(buff, 2 + 6, 4);
+			obs_h->l_d = (int)strtonum(buff, 2 + 6 + 6, 4);
+			obs_h->l_h = (int)strtonum(buff, 2 + 6 + 6 + 6, 4);
+			obs_h->l_min = (int)strtonum(buff, 2 + 6 + 6 + 6 + 6, 4);
+			obs_h->l_sec = strtonum(buff, 2 + 6 + 6 + 6 + 6 + 6, 9);
+			continue;
+		}
 		else if (strstr(lable, "END OF HEADER"))
 			break;
 	}