PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/15-02:27:50
G01     116.2          20.0                8.1 +/-    0.87      17.9 +/-    0.87  0.050 / 0.070
G07     88.5           64.7                5.0 +/-    0.55       5.5 +/-    0.55  0.050 / 0.050
G08     44.0           29.4                2.6 +/-    1.05       4.7 +/-    1.05  0.050 / 0.110
G09     177.1          23.5                4.8 +/-    1.05       9.7 +/-    1.05  0.050 / 0.100
G11     104.5          40.8                6.5 +/-    0.95       9.3 +/-    0.95  0.050 / 0.110
G13     316.6          21.0                0.4 +/-    1.06       0.9 +/-    1.06  0.050 / 0.110
G17     202.7          27.9                5.7 +/-    1.27      10.5 +/-    1.27  0.030 / 0.040
G28     300.3          58.9                2.9 +/-    0.57       3.4 +/-    0.57  0.030 / 0.040
G30     2.6            73.0                2.9 +/-    0.59       3.1 +/-    0.59  0.110 / 0.230