PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-21:27:50
G01     105.2          26.0               11.9 +/-    1.56      22.8 +/-    1.56  0.040 / 0.040
G07     111.8          52.1               11.5 +/-    0.56      14.2 +/-    0.56  0.040 / 0.040
G08     41.5           17.7                8.0 +/-    1.53      18.6 +/-    1.53  0.220 / 0.190
G09     175.0          13.2               12.6 +/-    2.33      32.6 +/-    2.33  0.250 / 0.280
G11     84.7           42.7               12.0 +/-    0.94      16.7 +/-    0.94  0.100 / 0.110
G13     308.1          30.2               10.4 +/-    0.62      18.1 +/-    0.62  0.070 / 0.130
G17     205.3          40.8               13.1 +/-    1.11      18.8 +/-    1.11  0.040 / 0.050
G18     75.7           23.6               10.0 +/-    1.14      20.2 +/-    1.14  0.040 / 0.050
G28     312.9          59.8                9.0 +/-    0.51      10.2 +/-    0.51  0.030 / 0.030
G30     33.5           78.9               10.9 +/-    0.98      11.1 +/-    0.98  0.030 / 0.030