PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-14:12:50
G01     117.3          19.2               10.1 +/-    1.55      22.6 +/-    1.55  0.040 / 0.020
G07     85.5           65.6               10.2 +/-    0.34      11.1 +/-    0.34  0.030 / 0.030
G08     44.1           29.4                8.2 +/-    1.58      14.6 +/-    1.58  0.030 / 0.030
G09     175.7          22.7               10.3 +/-    1.04      21.2 +/-    1.04  0.030 / 0.030
G11     103.6          40.7                9.8 +/-    0.64      14.0 +/-    0.64  0.110 / 0.180
G13     316.6          21.1                8.1 +/-    1.81      17.4 +/-    1.81  0.130 / 0.220
G17     202.2          26.3                9.4 +/-    1.93      17.8 +/-    1.93  0.210 / 0.440
G18     91.9           21.6                8.7 +/-    1.00      18.4 +/-    1.00  0.180 / 0.300
G28     296.3          58.1                8.5 +/-    1.55       9.8 +/-    1.55  0.140 / 0.180
G30     348.8          69.9                9.4 +/-    0.54       9.9 +/-    0.54  0.150 / 0.180