PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-21:57:40
G01     40.2           14.9                9.6 +/-    1.43      23.9 +/-    1.43  0.160 / 0.400
G02     199.1          10.8                6.1 +/-   26.74      16.6 +/-   26.74  0.090 / 0.380
G06     174.0          41.8               14.7 +/-    0.81      20.8 +/-    0.81  0.110 / 0.270
G13     236.3          20.7               14.0 +/-    1.91      30.3 +/-    1.91  0.090 / 0.310
G15     269.3          11.6               13.3 +/-    2.74      35.7 +/-    2.74  0.120 / 0.370
G17     354.7          71.1               11.1 +/-    0.64      11.7 +/-    0.64  0.130 / 0.290
G19     281.2          69.1               11.1 +/-    0.46      11.8 +/-    0.46  0.190 / 0.340
G24     315.8          20.9               10.6 +/-    2.77      22.8 +/-    2.77  0.200 / 0.410
G28     74.6           45.6               12.1 +/-    0.70      16.2 +/-    0.70  0.050 / 0.070
G30     154.7          24.4               15.2 +/-    1.31      30.2 +/-    1.31  0.050 / 0.070