PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-13:57:50
G01     113.5          21.8                8.8 +/-    3.14      18.6 +/-    3.14  0.040 / 0.030
G07     95.0           63.0                7.7 +/-    2.44       8.6 +/-    2.44  0.030 / 0.030
G08     42.8           25.5                5.2 +/-   12.44      10.1 +/-   12.44  0.110 / 0.160
G09     175.0          18.4                7.1 +/-    3.73      16.3 +/-    3.73  0.110 / 0.180
G11     97.5           41.8                7.4 +/-    3.24      10.5 +/-    3.24  0.030 / 0.030
G13     314.2          24.3                5.8 +/-    2.18      11.5 +/-    2.18  0.030 / 0.040
G17     203.4          31.0                7.8 +/-    3.38      13.5 +/-    3.38  0.060 / 0.050
G18     87.3           22.8                6.4 +/-    3.08      13.0 +/-    3.08  0.050 / 0.060
G28     304.4          59.4                5.6 +/-    2.44       6.4 +/-    2.44  0.050 / 0.090
G30     357.5          73.2                5.2 +/-    3.08       5.4 +/-    3.08  0.040 / 0.080