PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-18:42:50
G02     214.0          55.5               12.8 +/-    0.93      15.2 +/-    0.93  0.050 / 0.080
G06     64.1           75.2               11.4 +/-    0.30      11.7 +/-    0.30  0.050 / 0.050
G12     318.4          36.2               11.5 +/-    1.43      17.9 +/-    1.43  0.020 / 0.020
G17     54.6           34.5               10.2 +/-    1.77      16.3 +/-    1.77  0.030 / 0.020
G19     32.0           53.3               10.8 +/-    0.59      13.1 +/-    0.59  0.050 / 0.080
G24     268.1          42.4               12.1 +/-    1.89      17.0 +/-    1.89  0.060 / 0.070
G28     120.5          16.0               11.8 +/-    1.00      28.6 +/-    1.00  0.050 / 0.060