PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/23-17:28:10
G02     225.9          67.2                9.5 +/-    0.88      10.2 +/-    0.88  0.080 / 0.090
G06     44.4           65.9                7.5 +/-    0.44       8.2 +/-    0.44  0.110 / 0.110
G12     320.1          42.8                9.2 +/-    0.57      12.8 +/-    0.57  0.050 / 0.090
G17     62.3           29.5                7.4 +/-    0.97      13.1 +/-    0.97  0.050 / 0.100
G19     49.8           42.3                7.5 +/-    1.29      10.5 +/-    1.29  0.230 / 0.380
G24     254.8          38.5               11.1 +/-    1.94      16.6 +/-    1.94  0.190 / 0.410
G28     126.6          12.5                8.1 +/-    2.02      21.3 +/-    2.02  0.050 / 0.050