PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/02-17:27:40
G01     44.1           20.2                9.0 +/-    3.13      19.7 +/-    3.13  0.070 / 0.210
G06     174.8          34.8               11.9 +/-    0.89      18.9 +/-    0.89  0.120 / 0.250
G13     242.3          25.5               12.8 +/-    1.32      24.7 +/-    1.32  0.090 / 0.090
G15     277.8          13.5                9.6 +/-    2.02      24.7 +/-    2.02  0.080 / 0.100
G17     345.1          74.7               11.6 +/-    0.48      12.0 +/-    0.48  0.210 / 0.290
G19     259.8          63.6               11.7 +/-    0.38      12.9 +/-    0.38  0.280 / 0.400
G24     317.7          15.8                8.6 +/-    2.52      21.0 +/-    2.52  0.020 / 0.020
G28     64.4           49.4               12.0 +/-    0.86      15.3 +/-    0.86  0.020 / 0.020
G30     153.2          33.4               12.6 +/-    1.15      20.7 +/-    1.15  0.040 / 0.040