PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/14-19:42:50
G01     106.3          25.4               13.1 +/-    1.11      25.3 +/-    1.11  0.030 / 0.040
G07     110.7          52.1               12.6 +/-    0.86      15.5 +/-    0.86  0.030 / 0.040
G08     41.7           19.3                9.5 +/-    2.05      21.2 +/-    2.05  0.150 / 0.230
G09     175.4          14.6               12.5 +/-    1.48      31.5 +/-    1.48  0.160 / 0.210
G11     86.7           42.9               11.7 +/-    0.85      16.2 +/-    0.85  0.080 / 0.060
G13     309.0          29.6               11.8 +/-    0.92      20.8 +/-    0.92  0.070 / 0.050
G17     205.0          38.8               14.2 +/-    0.89      21.1 +/-    0.89  0.030 / 0.030
G18     77.6           23.7               11.6 +/-    1.97      23.4 +/-    1.97  0.030 / 0.020
G28     309.8          59.3               10.6 +/-    0.86      12.1 +/-    0.86  0.080 / 0.160
G30     32.0           78.5               11.1 +/-    0.86      11.3 +/-    0.86  0.080 / 0.150