PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-09:27:50
G07     325.6          55.1                3.7 +/-    0.70       4.4 +/-    0.70  0.120 / 0.150
G08     104.2          49.7                5.4 +/-    0.93       6.9 +/-    0.93  0.110 / 0.140
G09     190.3          77.1                5.3 +/-    1.43       5.5 +/-    1.43  0.070 / 0.040
G11     147.9          10.5               -2.9 +/-   11.90      -8.1 +/-   11.90  0.050 / 0.040
G16     45.5           8.9                 1.0 +/-    3.29       3.0 +/-    3.29  0.070 / 0.050
G23     154.0          48.3                4.5 +/-    0.92       5.7 +/-    0.92  0.040 / 0.080
G27     61.0           34.4                4.7 +/-    0.93       7.5 +/-    0.93  0.040 / 0.060
G28     233.1          24.9                5.9 +/-    2.06      11.5 +/-    2.06  0.040 / 0.050
G30     296.8          30.0                4.5 +/-    2.01       8.0 +/-    2.01  0.140 / 0.460