PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-22:12:30
G02     220.9          65.5               15.2 +/-    0.77      16.6 +/-    0.77  0.030 / 0.060
G06     48.1           68.9               12.9 +/-    0.47      13.8 +/-    0.47  0.040 / 0.060
G12     320.3          41.7               12.2 +/-    0.53      17.3 +/-    0.53  0.050 / 0.080
G17     60.1           31.4               11.6 +/-    1.45      19.7 +/-    1.45  0.080 / 0.090
G19     43.3           47.3               11.6 +/-    0.86      15.2 +/-    0.86  0.040 / 0.030
G24     258.3          40.2               14.6 +/-    4.54      21.2 +/-    4.54  0.030 / 0.020
G28     125.9          9.7                13.7 +/-    2.96      38.4 +/-    2.96  0.050 / 0.050