PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-21:42:40
G02     202.4          32.7               19.3 +/-    1.52      32.1 +/-    1.52  0.110 / 0.220
G06     160.9          67.2               15.7 +/-    0.36      16.9 +/-    0.36  0.080 / 0.320
G12     306.5          14.0               10.0 +/-    3.00      25.5 +/-    3.00  0.060 / 0.090
G17     30.4           53.6               13.4 +/-    0.88      16.2 +/-    0.88  0.080 / 0.110
G19     351.8          67.1               13.5 +/-    0.41      14.5 +/-    0.41  0.040 / 0.030
G24     300.3          37.0               11.6 +/-    1.55      17.8 +/-    1.55  0.040 / 0.030
G28     100.3          32.6               13.5 +/-    0.84      22.4 +/-    0.84  0.060 / 0.130