PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-12:43:00
G01     122.0          15.7                5.0 +/-    1.34      12.3 +/-    1.34  0.040 / 0.040
G07     71.5           68.0                3.3 +/-    1.08       3.6 +/-    1.08  0.030 / 0.040
G08     46.1           33.3                3.5 +/-    0.56       5.7 +/-    0.56  0.090 / 0.190
G09     176.0          27.7                6.2 +/-    2.29      11.5 +/-    2.29  0.100 / 0.160
G11     110.0          38.5                4.6 +/-    0.61       6.8 +/-    0.61  0.050 / 0.110
G13     319.1          16.9                0.6 +/-    1.85       1.4 +/-    1.85  0.040 / 0.100
G17     200.7          21.6                4.2 +/-    1.32       8.8 +/-    1.32  0.040 / 0.060
G18     97.3           19.4                5.0 +/-    0.98      11.2 +/-    0.98  0.040 / 0.070
G28     286.3          55.8                2.8 +/-    0.79       3.3 +/-    0.79  0.020 / 0.040
G30     339.1          64.9                2.2 +/-    0.63       2.4 +/-    0.63  0.020 / 0.040