PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-21:57:30
G02     208.8          49.9               12.8 +/-    0.46      16.1 +/-    0.46  0.060 / 0.160
G06     120.9          79.9               11.5 +/-    0.56      11.7 +/-    0.56  0.080 / 0.180
G12     313.4          24.2                9.4 +/-    0.62      18.6 +/-    0.62  0.080 / 0.070
G17     48.4           39.0               10.3 +/-    1.19      15.3 +/-    1.19  0.070 / 0.060
G19     26.2           55.8                9.6 +/-    1.31      11.4 +/-    1.31  0.090 / 0.100
G24     278.8          42.5                8.6 +/-    0.77      12.1 +/-    0.77  0.070 / 0.110
G28     113.1          25.6               11.1 +/-    1.60      21.4 +/-    1.60  0.030 / 0.020