PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-02:12:40
G02     26.7           61.1                8.7 +/-    0.81       9.7 +/-    0.81  0.150 / 0.150
G05     147.9          55.4               11.2 +/-    0.53      13.3 +/-    0.53  0.130 / 0.200
G06     49.6           22.1                7.0 +/-    1.91      14.7 +/-    1.91  0.030 / 0.020
G12     217.7          76.1               10.0 +/-    0.89      10.3 +/-    0.89  0.030 / 0.010
G19     93.0           15.6                9.8 +/-    2.30      24.0 +/-    2.30  0.040 / 0.010
G25     307.4          46.6                9.6 +/-    0.98      12.7 +/-    0.98  0.040 / 0.010
G29     301.3          21.6                8.4 +/-    1.93      17.7 +/-    1.93  0.050 / 0.030