PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/13-13:27:30
G01     319.8          15.6                4.1 +/-    1.98       9.9 +/-    1.98  0.180 / 0.250
G08     263.4          14.3                3.8 +/-    2.57       9.6 +/-    2.57  0.220 / 0.310
G10     75.2           54.9                5.9 +/-    0.75       7.1 +/-    0.75  0.030 / 0.050
G11     307.5          19.7                4.4 +/-    1.09       9.8 +/-    1.09  0.030 / 0.040
G14     283.6          68.3                6.7 +/-    0.68       7.1 +/-    0.68  0.050 / 0.060
G22     299.9          11.0                0.6 +/-    3.39       1.6 +/-    3.39  0.050 / 0.060
G31     175.6          40.2                7.9 +/-    1.15      11.4 +/-    1.15  0.030 / 0.030
G32     4.9            68.6                5.2 +/-    0.64       5.6 +/-    0.64  0.030 / 0.030