PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-23:28:10
G01     122.1          15.7               11.9 +/-    3.17      29.0 +/-    3.17  0.100 / 0.080
G07     70.2           68.2                8.8 +/-    0.35       9.4 +/-    0.35  0.050 / 0.070
G08     47.6           36.9                7.1 +/-    0.98      10.9 +/-    0.98  0.180 / 0.270
G09     178.3          30.6               11.5 +/-    1.53      19.8 +/-    1.53  0.160 / 0.280
G11     115.1          38.1               12.4 +/-    0.58      18.6 +/-    0.58  0.220 / 0.240
G13     319.5          15.9                7.0 +/-    2.31      17.0 +/-    2.31  0.330 / 0.320
G17     201.6          19.4               12.3 +/-    1.33      27.5 +/-    1.33  0.060 / 0.040
G28     287.4          56.3                8.6 +/-    2.55      10.1 +/-    2.55  0.060 / 0.070
G30     349.7          68.5                8.3 +/-    0.97       8.8 +/-    0.97  0.020 / 0.040