PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/12-08:12:40
G03     246.5          70.2                2.8 +/-    0.54       3.0 +/-    0.54  0.040 / 0.050
G09     300.8          14.7                2.7 +/-    1.58       6.6 +/-    1.58  0.030 / 0.050
G14     96.2           17.2                2.4 +/-    1.48       5.6 +/-    1.48  0.040 / 0.040
G16     132.6          55.4                3.7 +/-    0.60       4.4 +/-    0.60  0.050 / 0.040
G22     198.7          59.0                4.5 +/-    0.43       5.2 +/-    0.43  0.120 / 0.270
G23     319.7          50.0                2.0 +/-    0.52       2.5 +/-    0.52  0.130 / 0.280
G26     75.5           53.1                3.6 +/-    0.62       4.4 +/-    0.62  0.100 / 0.260
G31     51.0           21.0                3.0 +/-    2.75       6.4 +/-    2.75  0.080 / 0.210