PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-19:57:50
G01     116.8          19.6               14.8 +/-    0.82      32.8 +/-    0.82  0.120 / 0.200
G07     86.2           65.6               13.7 +/-    0.32      14.9 +/-    0.32  0.110 / 0.190
G08     45.0           32.8               10.8 +/-    0.64      17.8 +/-    0.64  0.110 / 0.420
G09     177.1          23.9               13.3 +/-    2.25      26.6 +/-    2.25  0.090 / 0.360
G11     105.5          41.0               15.3 +/-    1.01      21.9 +/-    1.01  0.050 / 0.070
G13     316.6          21.1                9.1 +/-    2.25      19.4 +/-    2.25  0.050 / 0.070
G17     203.8          22.8               13.0 +/-    1.30      26.7 +/-    1.30  0.030 / 0.050
G18     92.1           21.8               13.6 +/-    1.48      28.6 +/-    1.48  0.030 / 0.040
G28     298.4          58.5               13.1 +/-    0.80      15.1 +/-    0.80  0.060 / 0.080
G30     356.8          71.9               12.5 +/-    0.81      13.1 +/-    0.81  0.060 / 0.080