PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-23:27:30
G10     245.8          24.1               11.4 +/-    0.94      22.7 +/-    0.94  0.040 / 0.060
G13     58.5           31.7                7.9 +/-    1.16      13.4 +/-    1.16  0.040 / 0.050
G15     97.4           57.6               10.1 +/-    1.28      11.8 +/-    1.28  0.070 / 0.150
G16     302.1          15.2                6.8 +/-    1.75      16.8 +/-    1.75  0.090 / 0.130
G20     262.6          46.6               10.4 +/-    3.67      13.6 +/-    3.67  0.060 / 0.110
G21     327.0          55.6                8.7 +/-    0.91      10.3 +/-    0.91  0.060 / 0.130
G26     274.1          17.4                8.7 +/-    3.00      20.3 +/-    3.00  0.030 / 0.030
G29     161.0          55.8                9.4 +/-    0.36      11.1 +/-    0.36  0.030 / 0.040