PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-18:27:50
G01     96.9           29.4               12.1 +/-    0.87      21.4 +/-    0.87  0.030 / 0.030
G07     120.7          44.4               13.5 +/-    0.73      18.3 +/-    0.73  0.030 / 0.030
G08     41.7           12.6                9.0 +/-    2.74      23.7 +/-    2.74  0.060 / 0.060
G11     74.9           41.9               11.1 +/-    1.03      15.7 +/-    1.03  0.050 / 0.060
G13     300.9          34.5               12.1 +/-    0.83      19.4 +/-    0.83  0.040 / 0.050
G17     209.4          47.2               13.5 +/-    0.67      17.7 +/-    0.67  0.040 / 0.050
G18     68.5           24.0               10.2 +/-    1.38      20.4 +/-    1.38  0.050 / 0.120
G19     211.3          21.7               12.6 +/-    1.37      26.5 +/-    1.37  0.070 / 0.130
G28     326.1          60.9               10.7 +/-    0.79      12.1 +/-    0.79  0.110 / 0.150
G30     84.7           77.9               12.4 +/-    0.33      12.6 +/-    0.33  0.090 / 0.130