PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/11-20:28:10
G02     207.2          45.0               16.9 +/-    0.85      22.8 +/-    0.85  0.040 / 0.080
G06     122.9          78.2               13.6 +/-    0.50      13.8 +/-    0.50  0.060 / 0.080
G12     313.3          25.0               11.2 +/-    0.74      21.9 +/-    0.74  0.060 / 0.070
G17     43.8           43.4               10.8 +/-    0.93      14.9 +/-    0.93  0.060 / 0.080
G19     16.4           60.0               12.8 +/-    0.60      14.6 +/-    0.60  0.070 / 0.160
G24     284.5          42.0               11.9 +/-    1.04      16.7 +/-    1.04  0.090 / 0.160
G28     111.9          24.1               12.3 +/-    0.63      24.5 +/-    0.63  0.040 / 0.070