PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-20:57:40
G01     37.8           10.2               11.9 +/-    2.05      33.0 +/-    2.05  0.120 / 0.190
G02     199.6          16.1               21.8 +/-    1.72      52.8 +/-    1.72  0.080 / 0.180
G06     171.8          48.9               17.7 +/-    0.83      22.6 +/-    0.83  0.050 / 0.090
G13     231.2          16.5               17.8 +/-    1.74      42.6 +/-    1.74  0.070 / 0.070
G17     9.4            66.1               15.7 +/-    0.74      17.1 +/-    0.74  0.100 / 0.180
G19     299.8          70.6               16.4 +/-    0.69      17.2 +/-    0.69  0.080 / 0.170
G24     313.0          26.0               13.3 +/-    4.04      25.4 +/-    4.04  0.130 / 0.300
G28     82.1           42.5               16.3 +/-    0.41      22.9 +/-    0.41  0.110 / 0.320
G30     156.2          18.9               20.8 +/-    1.80      47.0 +/-    1.80  0.050 / 0.060