PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/29-12:42:40
G07     308.3          47.1                4.6 +/-    1.03       6.1 +/-    1.03  0.040 / 0.080
G08     126.7          41.8                6.0 +/-    0.68       8.4 +/-    0.68  0.040 / 0.080
G09     294.4          81.3                2.5 +/-    0.83       2.5 +/-    0.83  0.090 / 0.220
G16     42.3           20.9                3.0 +/-    1.36       6.4 +/-    1.36  0.090 / 0.200
G23     144.9          59.9                5.9 +/-    1.13       6.7 +/-    1.13  0.030 / 0.030
G27     77.4           37.3                3.4 +/-    1.15       5.2 +/-    1.15  0.030 / 0.030
G28     224.8          13.7                6.7 +/-    1.91      17.1 +/-    1.91  0.050 / 0.080
G30     286.8          22.6                5.7 +/-    1.33      11.7 +/-    1.33  0.050 / 0.090