PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/19-03:12:50
G01     86.5           32.5                2.8 +/-    1.03       4.6 +/-    1.03  0.060 / 0.040
G07     128.2          42.8                4.7 +/-    0.61       6.6 +/-    0.61  0.050 / 0.030
G11     67.0           39.3                3.3 +/-    1.90       4.8 +/-    1.90  0.210 / 0.360
G13     292.0          36.2                5.0 +/-    1.24       7.7 +/-    1.24  0.270 / 0.250
G15     312.6          11.9                3.0 +/-    3.25       8.1 +/-    3.25  0.040 / 0.040
G17     217.3          56.4                5.3 +/-    0.95       6.3 +/-    0.95  0.060 / 0.050
G19     216.1          30.7                4.0 +/-    2.69       6.9 +/-    2.69  0.030 / 0.060
G28     356.8          61.4                2.3 +/-    0.78       2.6 +/-    0.78  0.040 / 0.050
G30     116.1          70.3                3.9 +/-    0.85       4.1 +/-    0.85  0.060 / 0.090