PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/09-10:57:30
G07     315.0          50.9                2.2 +/-    0.78       2.8 +/-    0.78  0.020 / 0.020
G08     120.1          44.0                4.0 +/-    0.90       5.4 +/-    0.90  0.020 / 0.020
G09     266.8          84.2                2.1 +/-    0.63       2.1 +/-    0.63  0.040 / 0.050
G16     42.3           22.2                2.5 +/-    1.72       5.3 +/-    1.72  0.060 / 0.050
G23     147.5          61.0                5.2 +/-    0.44       5.9 +/-    0.44  0.030 / 0.040
G27     72.4           36.4                3.0 +/-    0.83       4.6 +/-    0.83  0.030 / 0.030
G28     226.5          16.4                3.7 +/-    9.21       8.8 +/-    9.21  0.140 / 0.150
G30     287.9          22.8                5.3 +/-    1.69      11.0 +/-    1.69  0.110 / 0.100