PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/15-13:13:10
G01     320.4          13.5                2.2 +/-    1.75       5.7 +/-    1.75  0.030 / 0.040
G08     265.9          15.5                6.8 +/-    1.80      16.6 +/-    1.80  0.030 / 0.030
G10     70.8           56.2                4.6 +/-    0.50       5.4 +/-    0.50  0.040 / 0.060
G11     309.5          18.3                5.8 +/-    2.48      13.2 +/-    2.48  0.050 / 0.080
G14     276.7          67.1                8.1 +/-    0.61       8.7 +/-    0.61  0.260 / 0.320
G27     227.0          11.8                5.9 +/-    2.97      15.8 +/-    2.97  0.240 / 0.400
G31     176.2          37.4                8.3 +/-    1.02      12.6 +/-    1.02  0.140 / 0.320
G32     359.1          70.4                5.8 +/-    0.43       6.2 +/-    0.43  0.170 / 0.250