PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-15:28:10
G01     41.9           17.6                7.4 +/-    3.29      17.4 +/-    3.29  0.370 / 0.220
G06     174.7          36.0                9.4 +/-    1.31      14.7 +/-    1.31  0.320 / 0.440
G13     238.8          24.4               11.0 +/-    2.55      21.8 +/-    2.55  0.060 / 0.090
G15     273.3          13.1                9.1 +/-    1.75      23.6 +/-    1.75  0.070 / 0.090
G17     344.9          74.2                8.8 +/-    0.49       9.1 +/-    0.49  0.040 / 0.060
G19     270.7          68.9                8.3 +/-    0.82       8.8 +/-    0.82  0.050 / 0.060
G24     317.3          16.4                7.5 +/-    3.58      18.0 +/-    3.58  0.020 / 0.020
G28     60.9           52.5                8.1 +/-    1.01       9.9 +/-    1.01  0.030 / 0.020
G30     153.5          29.3                9.1 +/-    1.21      16.2 +/-    1.21  0.040 / 0.040