PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/13-15:42:50
G01     43.6           19.7                9.5 +/-    2.28      21.1 +/-    2.28  0.050 / 0.060
G06     175.5          32.8               12.9 +/-    1.92      21.3 +/-    1.92  0.040 / 0.060
G13     241.5          26.3               12.6 +/-    2.23      23.8 +/-    2.23  0.140 / 0.380
G15     275.9          13.9                9.1 +/-    1.92      23.3 +/-    1.92  0.110 / 0.280
G17     335.9          75.8               11.2 +/-    0.41      11.5 +/-    0.41  0.030 / 0.020
G19     262.8          67.1               12.3 +/-    0.81      13.2 +/-    0.81  0.030 / 0.030
G24     318.0          14.0                7.0 +/-    1.10      17.9 +/-    1.10  0.040 / 0.050
G28     56.5           53.6               11.2 +/-    0.73      13.5 +/-    0.73  0.040 / 0.040
G30     152.5          32.0               11.5 +/-    0.54      19.4 +/-    0.54  0.100 / 0.230