PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-21:42:20
G02     206.2          44.0               15.5 +/-    0.63      21.1 +/-    0.63  0.080 / 0.100
G06     132.8          77.3               13.8 +/-    0.61      14.1 +/-    0.61  0.080 / 0.120
G12     312.3          22.9                9.9 +/-    2.59      20.2 +/-    2.59  0.060 / 0.080
G17     41.5           45.3               11.6 +/-    1.42      15.6 +/-    1.42  0.070 / 0.070
G19     14.4           60.8               12.2 +/-    0.60      13.7 +/-    0.60  0.020 / 0.020
G24     287.2          41.5                8.2 +/-    4.48      11.6 +/-    4.48  0.020 / 0.020
G28     110.5          25.2               13.0 +/-    1.10      25.3 +/-    1.10  0.060 / 0.030