PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-18:12:50
G01     119.5          17.7               14.9 +/-    2.10      34.7 +/-    2.10  0.100 / 0.080
G07     78.7           67.1               13.4 +/-    0.69      14.4 +/-    0.69  0.040 / 0.090
G08     45.9           34.2               11.1 +/-    1.09      17.9 +/-    1.09  0.030 / 0.030
G09     177.2          26.6               14.2 +/-    1.14      26.8 +/-    1.14  0.030 / 0.030
G11     108.6          39.8               13.4 +/-    0.69      19.6 +/-    0.69  0.030 / 0.030
G13     318.0          18.9               11.6 +/-    1.33      26.2 +/-    1.33  0.020 / 0.030
G17     202.6          21.2               16.8 +/-    2.44      35.9 +/-    2.44  0.100 / 0.200
G18     95.1           20.7               12.8 +/-    2.01      27.8 +/-    2.01  0.120 / 0.190
G28     292.5          57.4               13.2 +/-    2.05      15.3 +/-    2.05  0.040 / 0.050
G30     348.3          69.0               13.2 +/-    0.66      14.0 +/-    0.66  0.040 / 0.060