PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-20:27:50
G01     111.9          22.3               10.9 +/-    1.90      22.7 +/-    1.90  0.030 / 0.040
G07     102.4          56.9               13.1 +/-    0.86      15.3 +/-    0.86  0.030 / 0.030
G08     42.4           23.7               10.0 +/-    1.84      20.0 +/-    1.84  0.050 / 0.040
G09     176.3          19.6               14.5 +/-    3.37      32.2 +/-    3.37  0.070 / 0.050
G11     94.4           42.5               13.3 +/-    0.68      18.6 +/-    0.68  0.140 / 0.180
G13     313.1          25.8                9.7 +/-    1.83      18.6 +/-    1.83  0.110 / 0.160
G17     202.8          33.4               14.2 +/-    0.92      23.2 +/-    0.92  0.080 / 0.160
G18     83.3           22.7               11.0 +/-    2.29      22.6 +/-    2.29  0.090 / 0.130
G28     299.8          57.8               11.4 +/-    1.15      13.2 +/-    1.15  0.030 / 0.020
G30     6.9            75.3               12.3 +/-    0.60      12.7 +/-    0.60  0.030 / 0.020