PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/28-14:12:50
G01     115.7          19.3                9.4 +/-    1.53      20.9 +/-    1.53  0.070 / 0.070
G07     93.2           61.1                9.2 +/-    0.66      10.3 +/-    0.66  0.050 / 0.090
G08     44.4           30.8                7.9 +/-    1.41      13.6 +/-    1.41  0.070 / 0.070
G09     177.1          24.4               10.4 +/-    0.66      20.5 +/-    0.66  0.060 / 0.070
G11     102.5          41.8                9.0 +/-    0.61      12.8 +/-    0.61  0.030 / 0.030
G13     315.8          22.6                6.5 +/-    1.73      13.4 +/-    1.73  0.040 / 0.050
G17     202.3          25.3                8.3 +/-    2.44      16.1 +/-    2.44  0.090 / 0.210
G18     90.0           21.7                7.3 +/-    1.44      15.3 +/-    1.44  0.070 / 0.240
G28     289.0          54.8                8.5 +/-    2.06      10.2 +/-    2.06  0.120 / 0.130
G30     358.1          72.6                8.6 +/-    0.81       9.0 +/-    0.81  0.080 / 0.140