PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-12:27:50
G07     330.4          57.0                5.3 +/-    0.92       6.2 +/-    0.92  0.070 / 0.090
G08     101.3          51.4                6.9 +/-    0.46       8.6 +/-    0.46  0.080 / 0.090
G09     188.7          74.1                6.8 +/-    0.21       7.1 +/-    0.21  0.040 / 0.040
G11     146.4          12.4                7.4 +/-    2.22      19.5 +/-    2.22  0.040 / 0.040
G23     154.6          42.0                6.7 +/-    1.04       9.4 +/-    1.04  0.060 / 0.080
G27     56.7           32.6                4.8 +/-    1.13       7.9 +/-    1.13  0.070 / 0.120
G28     236.0          28.2                5.9 +/-    2.09      10.8 +/-    2.09  0.040 / 0.060
G30     300.3          33.4                3.6 +/-    1.24       5.9 +/-    1.24  0.040 / 0.080