PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/27-17:12:30
G01     38.1           11.6                6.2 +/-    3.63      16.6 +/-    3.63  0.040 / 0.070
G02     199.7          12.0                7.5 +/-   13.22      20.0 +/-   13.22  0.050 / 0.070
G06     173.3          44.4               11.5 +/-    0.94      15.6 +/-    0.94  0.190 / 0.460
G13     232.2          18.9               11.5 +/-    3.56      26.1 +/-    3.56  0.100 / 0.320
G17     6.9            67.8                9.0 +/-    0.84       9.7 +/-    0.84  0.090 / 0.210
G19     296.7          71.7                8.5 +/-    0.63       8.9 +/-    0.63  0.080 / 0.130
G24     314.4          23.2                7.9 +/-    0.96      16.0 +/-    0.96  0.030 / 0.030
G28     73.0           48.5                8.5 +/-    1.13      11.0 +/-    1.13  0.030 / 0.040
G30     155.1          20.3                8.4 +/-    2.04      18.2 +/-    2.04  0.050 / 0.070