PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-14:42:30
G01     320.1          14.6                3.5 +/-    2.09       8.8 +/-    2.09  0.120 / 0.260
G08     263.6          14.9                6.2 +/-    1.66      15.6 +/-    1.66  0.190 / 0.280
G10     73.1           55.6                5.4 +/-    0.42       6.4 +/-    0.42  0.050 / 0.070
G11     308.6          19.0                6.5 +/-    1.48      14.8 +/-    1.48  0.040 / 0.080
G14     281.6          68.2                5.9 +/-    0.49       6.3 +/-    0.49  0.040 / 0.050
G27     225.9          10.9                5.6 +/-    3.45      15.4 +/-    3.45  0.040 / 0.060
G31     176.3          38.5                9.3 +/-    0.88      13.8 +/-    0.88  0.030 / 0.030
G32     1.3            69.7                6.2 +/-    0.65       6.5 +/-    0.65  0.030 / 0.040