PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-05:12:50
G01     102.9          27.6                6.7 +/-    1.37      12.3 +/-    1.37  0.040 / 0.040
G07     112.8          54.6                5.8 +/-    0.49       7.0 +/-    0.49  0.040 / 0.040
G08     41.7           16.7                2.4 +/-    2.08       5.8 +/-    2.08  0.150 / 0.180
G09     174.4          10.6                4.3 +/-    1.97      11.7 +/-    1.97  0.140 / 0.210
G11     84.2           42.3                4.4 +/-    0.66       6.1 +/-    0.66  0.040 / 0.040
G13     307.3          29.9                3.2 +/-    1.28       5.6 +/-    1.28  0.040 / 0.040
G17     207.5          43.0                7.7 +/-    1.15      10.7 +/-    1.15  0.060 / 0.100
G19     210.1          17.7                5.5 +/-    1.73      12.7 +/-    1.73  0.060 / 0.100
G28     327.6          61.6                3.2 +/-    0.75       3.6 +/-    0.75  0.030 / 0.030
G30     53.2           78.9                4.3 +/-    0.93       4.4 +/-    0.93  0.020 / 0.040