PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/15-12:27:50
G01     68.8           32.1                5.6 +/-    1.69       9.3 +/-    1.69  0.030 / 0.030
G07     137.3          27.8                4.6 +/-    1.47       8.4 +/-    1.47  0.030 / 0.040
G11     53.2           31.4                3.9 +/-    1.75       6.6 +/-    1.75  0.090 / 0.110
G13     272.4          38.5                6.5 +/-    1.32       9.8 +/-    1.32  0.060 / 0.110
G15     302.4          15.0                1.9 +/-    1.73       4.8 +/-    1.73  0.050 / 0.040
G17     231.2          65.6                6.7 +/-    1.18       7.3 +/-    1.18  0.040 / 0.040
G18     47.7           17.5                4.1 +/-    1.67       9.6 +/-    1.67  0.120 / 0.090
G19     223.7          44.3                5.1 +/-    1.58       6.9 +/-    1.58  0.070 / 0.110
G28     7.3            61.1                5.7 +/-    0.73       6.4 +/-    0.73  0.110 / 0.240
G30     136.4          61.5                6.7 +/-    0.44       7.5 +/-    0.44  0.120 / 0.190