PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-17:58:00
G01     119.0          18.1               15.3 +/-    1.78      35.4 +/-    1.78  0.050 / 0.080
G07     80.3           66.8               14.2 +/-    0.71      15.3 +/-    0.71  0.070 / 0.090
G08     45.6           33.5               11.8 +/-    1.52      19.3 +/-    1.52  0.020 / 0.030
G09     177.0          25.9               14.5 +/-    1.62      27.7 +/-    1.62  0.030 / 0.030
G11     107.7          40.0               14.7 +/-    0.43      21.3 +/-    0.43  0.030 / 0.030
G13     317.7          19.4               12.2 +/-    1.57      27.2 +/-    1.57  0.030 / 0.040
G17     202.7          22.0               16.6 +/-    2.53      34.8 +/-    2.53  0.130 / 0.260
G18     94.4           21.0               14.8 +/-    1.66      31.9 +/-    1.66  0.120 / 0.240
G28     293.5          57.6               13.6 +/-    1.36      15.7 +/-    1.36  0.060 / 0.060
G30     349.1          69.4               13.5 +/-    0.34      14.3 +/-    0.34  0.060 / 0.050