PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/28-09:27:50
G01     68.3           31.9                4.0 +/-    0.58       6.7 +/-    0.58  0.040 / 0.030
G07     137.4          29.0                5.9 +/-    1.17      10.5 +/-    1.17  0.030 / 0.040
G11     53.7           32.4                2.5 +/-    0.69       4.2 +/-    0.69  0.070 / 0.110
G13     272.2          38.6                8.3 +/-    1.08      12.4 +/-    1.08  0.080 / 0.130
G15     301.9          15.3                1.9 +/-    2.60       4.6 +/-    2.60  0.070 / 0.130
G17     231.9          67.9                7.2 +/-    0.67       7.7 +/-    0.67  0.060 / 0.100
G18     47.8           17.6                1.9 +/-    0.77       4.3 +/-    0.77  0.060 / 0.080
G19     223.7          44.7                7.0 +/-    0.85       9.5 +/-    0.85  0.050 / 0.080
G28     5.7            61.2                2.8 +/-    0.55       3.2 +/-    0.55  0.090 / 0.180
G30     136.7          63.4                7.1 +/-    0.75       7.9 +/-    0.75  0.110 / 0.210