PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/10-11:57:30
G01     92.1           31.2                1.7 +/-    1.47       2.8 +/-    1.47  0.050 / 0.130
G07     124.1          44.6                4.4 +/-    0.44       6.0 +/-    0.44  0.060 / 0.140
G11     69.4           38.5                2.0 +/-    1.13       3.0 +/-    1.13  0.020 / 0.020
G13     298.8          33.8                0.7 +/-    1.70       1.1 +/-    1.70  0.030 / 0.020
G17     212.8          54.4                3.1 +/-    0.68       3.7 +/-    0.68  0.040 / 0.040
G19     213.6          27.1                2.7 +/-    1.12       5.0 +/-    1.12  0.040 / 0.040
G28     346.3          61.7                1.4 +/-    0.67       1.5 +/-    0.67  0.050 / 0.040
G30     90.6           78.4                3.0 +/-    0.46       3.1 +/-    0.46  0.060 / 0.040