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                4.7 +/-    1.85       8.0 +/-    1.85  0.070 / 0.110
G07     137.4          28.7                4.2 +/-    1.74       7.5 +/-    1.74  0.070 / 0.110
G11     53.6           32.1                2.6 +/-    1.49       4.3 +/-    1.49  0.030 / 0.040
G13     272.2          38.6                6.9 +/-    1.78      10.3 +/-    1.78  0.040 / 0.040
G15     302.4          15.0                1.3 +/-    2.33       3.3 +/-    2.33  0.090 / 0.130
G17     231.7          67.4                5.4 +/-    0.67       5.8 +/-    0.67  0.090 / 0.100
G18     47.8           17.6                2.8 +/-    1.10       6.4 +/-    1.10  0.140 / 0.200
G19     223.7          44.6                4.7 +/-    2.48       6.3 +/-    2.48  0.170 / 0.270
G28     6.1            61.2                3.5 +/-    1.24       4.0 +/-    1.24  0.040 / 0.060
G30     136.6          63.0                5.0 +/-    0.38       5.5 +/-    0.38  0.040 / 0.050