PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-08:57:50
G01     104.7          26.7                5.7 +/-    0.42      10.8 +/-    0.42  0.030 / 0.060
G07     110.8          54.9                5.6 +/-    0.72       6.7 +/-    0.72  0.030 / 0.050
G08     41.7           17.1                3.0 +/-    1.11       7.0 +/-    1.11  0.060 / 0.060
G09     173.8          11.0                3.5 +/-    1.73       9.5 +/-    1.73  0.070 / 0.070
G11     84.9           41.5                4.4 +/-    0.48       6.3 +/-    0.48  0.040 / 0.050
G13     309.2          28.5                2.7 +/-    1.70       4.8 +/-    1.70  0.030 / 0.050
G17     206.3          42.3                4.7 +/-    1.43       6.5 +/-    1.43  0.110 / 0.150
G19     209.5          16.4                3.9 +/-    1.71       9.5 +/-    1.71  0.150 / 0.180
G28     323.6          61.3                3.9 +/-    0.95       4.3 +/-    0.95  0.230 / 0.340
G30     31.6           78.7                5.3 +/-    1.02       5.4 +/-    1.02  0.190 / 0.430