PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-03:27:50
G01     68.9           32.7                3.3 +/-    0.61       5.5 +/-    0.61  0.030 / 0.050
G07     138.3          29.6                5.0 +/-    1.18       8.9 +/-    1.18  0.030 / 0.040
G11     53.8           30.9                2.9 +/-    0.54       5.0 +/-    0.54  0.030 / 0.040
G13     273.6          36.9                3.6 +/-    0.94       5.4 +/-    0.94  0.020 / 0.030
G15     300.4          16.1                1.0 +/-    2.66       2.5 +/-    2.66  0.060 / 0.130
G17     236.6          70.0                4.9 +/-    0.93       5.2 +/-    0.93  0.060 / 0.090
G19     225.6          44.3                5.5 +/-    0.97       7.4 +/-    0.97  0.100 / 0.300
G28     23.7           58.6                2.2 +/-    0.23       2.6 +/-    0.23  0.120 / 0.320
G30     136.6          56.6                4.9 +/-    0.48       5.7 +/-    0.48  0.040 / 0.070