PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-10:12:50
G01     68.4           31.9                2.5 +/-    0.54       4.2 +/-    0.54  0.050 / 0.060
G07     137.4          28.7                4.4 +/-    1.93       7.8 +/-    1.93  0.040 / 0.060
G11     53.6           32.1                2.6 +/-    0.66       4.3 +/-    0.66  0.070 / 0.110
G13     272.2          38.6                6.9 +/-    1.14      10.3 +/-    1.14  0.070 / 0.120
G15     302.4          15.0                0.4 +/-    2.06       1.1 +/-    2.06  0.040 / 0.040
G17     231.7          67.4                5.6 +/-    0.67       6.0 +/-    0.67  0.040 / 0.050
G18     47.8           17.6                1.6 +/-    0.54       3.8 +/-    0.54  0.070 / 0.120
G19     223.7          44.6                5.1 +/-    1.72       6.8 +/-    1.72  0.070 / 0.150
G28     6.1            61.2                2.2 +/-    0.82       2.5 +/-    0.82  0.060 / 0.080
G30     136.6          63.0                5.0 +/-    0.82       5.5 +/-    0.82  0.050 / 0.090