PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-22:12:30
G02     207.2          46.7               16.1 +/-    0.82      21.2 +/-    0.82  0.110 / 0.110
G06     121.3          78.6               14.7 +/-    0.39      15.0 +/-    0.39  0.090 / 0.110
G12     313.4          24.7                9.7 +/-    1.25      19.1 +/-    1.25  0.060 / 0.070
G17     43.5           43.9               12.6 +/-    1.25      17.3 +/-    1.25  0.070 / 0.090
G19     18.8           59.2               13.1 +/-    0.64      15.0 +/-    0.64  0.030 / 0.020
G24     284.0          42.0               10.3 +/-    2.64      14.5 +/-    2.64  0.040 / 0.030
G28     112.6          23.4               14.9 +/-    0.91      30.3 +/-    0.91  0.100 / 0.170