PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-12:42:50
G01     76.5           33.2                4.5 +/-    1.31       7.4 +/-    1.31  0.060 / 0.110
G07     134.4          35.2                5.9 +/-    1.10       9.3 +/-    1.10  0.060 / 0.120
G11     56.3           32.8                2.8 +/-    1.51       4.6 +/-    1.51  0.050 / 0.080
G13     280.2          38.0                3.5 +/-    1.54       5.3 +/-    1.54  0.040 / 0.090
G15     309.8          12.0                2.2 +/-    2.04       5.8 +/-    2.04  0.030 / 0.050
G17     225.9          66.6                4.7 +/-    1.42       5.0 +/-    1.42  0.040 / 0.050
G18     52.4           19.9                5.2 +/-    2.34      11.4 +/-    2.34  0.100 / 0.100
G19     220.7          33.9                3.4 +/-    0.71       5.5 +/-    0.71  0.090 / 0.110
G28     10.3           60.4                2.7 +/-    0.66       3.0 +/-    0.66  0.030 / 0.040
G30     129.2          68.4                2.0 +/-    0.60       2.2 +/-    0.60  0.030 / 0.040