PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/30-08:57:40
G01     80.4           32.2                4.9 +/-    0.60       8.2 +/-    0.60  0.030 / 0.030
G07     130.8          38.3                6.2 +/-    0.52       9.2 +/-    0.52  0.040 / 0.040
G11     62.4           38.8                5.0 +/-    0.58       7.4 +/-    0.58  0.040 / 0.070
G13     285.5          38.7                5.9 +/-    0.82       8.7 +/-    0.82  0.040 / 0.070
G15     310.4          12.6                2.3 +/-    1.48       6.0 +/-    1.48  0.050 / 0.120
G17     218.8          58.4                7.4 +/-    0.68       8.5 +/-    0.68  0.050 / 0.100
G18     56.5           22.0                2.2 +/-    1.07       4.6 +/-    1.07  0.070 / 0.190
G19     216.8          35.2                6.3 +/-    1.46      10.0 +/-    1.46  0.080 / 0.170
G28     345.6          61.5                3.3 +/-    0.83       3.7 +/-    0.83  0.060 / 0.120
G30     120.7          73.2                6.2 +/-    1.05       6.5 +/-    1.05  0.070 / 0.090