PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/11-02:12:40
G01     67.5           32.5                4.2 +/-    1.22       7.0 +/-    1.22  0.080 / 0.280
G07     139.0          28.6                5.9 +/-    1.59      10.7 +/-    1.59  0.110 / 0.290
G11     53.3           30.7                3.7 +/-    0.84       6.4 +/-    0.84  0.030 / 0.050
G13     271.9          36.8                4.5 +/-    1.02       6.9 +/-    1.02  0.030 / 0.050
G15     299.3          16.3                2.2 +/-    2.60       5.3 +/-    2.60  0.040 / 0.040
G17     238.7          70.2                4.6 +/-    0.65       4.9 +/-    0.65  0.030 / 0.030
G19     226.6          45.2                6.5 +/-    0.90       8.7 +/-    0.90  0.050 / 0.080
G28     25.8           58.3                2.7 +/-    0.50       3.1 +/-    0.50  0.040 / 0.090
G30     137.8          54.4                6.0 +/-    0.69       7.3 +/-    0.69  0.060 / 0.110