PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-18:27:50
G01     115.2          20.7               15.4 +/-    1.32      33.3 +/-    1.32  0.050 / 0.120
G07     90.5           64.5               13.7 +/-    0.52      15.0 +/-    0.52  0.050 / 0.100
G08     44.0           30.0               10.9 +/-    0.99      19.1 +/-    0.99  0.120 / 0.160
G09     176.5          21.7               12.8 +/-    1.55      27.1 +/-    1.55  0.130 / 0.170
G11     102.2          41.6               15.7 +/-    0.36      22.3 +/-    0.36  0.040 / 0.080
G13     315.5          22.6                8.8 +/-    1.95      18.1 +/-    1.95  0.040 / 0.090
G17     203.9          26.0               13.8 +/-    2.74      26.3 +/-    2.74  0.040 / 0.070
G18     90.0           22.4               12.7 +/-    1.16      26.3 +/-    1.16  0.040 / 0.070
G28     301.6          59.1               12.9 +/-    0.69      14.8 +/-    0.69  0.030 / 0.040
G30     358.8          72.9               13.5 +/-    0.56      14.0 +/-    0.56  0.030 / 0.040