PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-00:12:30
G07     346.6          62.3                5.3 +/-    0.92       5.9 +/-    0.92  0.060 / 0.110
G08     86.0           53.1                6.2 +/-    0.59       7.6 +/-    0.59  0.060 / 0.120
G09     185.6          65.4                8.2 +/-    0.81       8.9 +/-    0.81  0.040 / 0.090
G11     141.8          17.8                8.5 +/-    1.51      19.7 +/-    1.51  0.050 / 0.120
G23     157.7          32.3                7.9 +/-    0.78      13.1 +/-    0.78  0.030 / 0.050
G27     47.4           26.0                5.6 +/-    0.95      10.8 +/-    0.95  0.040 / 0.050
G28     245.1          36.8                8.8 +/-    0.64      13.6 +/-    0.64  0.040 / 0.050
G30     311.4          43.9                4.4 +/-    1.15       6.0 +/-    1.15  0.040 / 0.050