PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/29-12:43:00
G07     308.3          47.1                3.8 +/-    1.31       5.0 +/-    1.31  0.040 / 0.050
G08     126.7          41.8                5.1 +/-    0.98       7.1 +/-    0.98  0.050 / 0.040
G09     294.4          81.3                4.3 +/-    0.62       4.3 +/-    0.62  0.110 / 0.140
G16     42.3           20.9                4.7 +/-    1.96      10.1 +/-    1.96  0.150 / 0.160
G23     144.9          59.9                5.9 +/-    0.39       6.7 +/-    0.39  0.030 / 0.060
G27     77.4           37.3                4.4 +/-    0.60       6.8 +/-    0.60  0.040 / 0.060
G28     224.8          13.7                4.6 +/-    2.05      11.8 +/-    2.05  0.040 / 0.030
G30     286.8          22.6                5.3 +/-    1.31      11.0 +/-    1.31  0.040 / 0.040