PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-20:42:50
G01     105.2          26.0               11.5 +/-    1.50      22.0 +/-    1.50  0.030 / 0.030
G07     112.0          51.7               13.0 +/-    0.73      16.1 +/-    0.73  0.040 / 0.040
G08     41.5           17.9                9.1 +/-    1.33      21.1 +/-    1.33  0.040 / 0.050
G09     175.1          13.4               13.6 +/-    1.53      35.2 +/-    1.53  0.040 / 0.050
G11     84.8           42.8               12.7 +/-    0.88      17.7 +/-    0.88  0.190 / 0.220
G13     308.1          30.3               11.8 +/-    1.15      20.5 +/-    1.15  0.230 / 0.290
G17     205.4          40.5               14.3 +/-    0.97      20.6 +/-    0.97  0.090 / 0.140
G18     75.9           23.7               11.1 +/-    1.36      22.3 +/-    1.36  0.080 / 0.130
G28     312.6          59.7               10.9 +/-    0.50      12.4 +/-    0.50  0.030 / 0.020
G30     35.6           79.0               12.2 +/-    0.68      12.4 +/-    0.68  0.030 / 0.020