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                4.1 +/-    1.59       6.9 +/-    1.59  0.040 / 0.040
G07     139.0          28.6                6.5 +/-    0.91      11.8 +/-    0.91  0.040 / 0.040
G11     53.3           30.7                3.5 +/-    1.50       6.1 +/-    1.50  0.030 / 0.030
G13     271.9          36.8                3.1 +/-    1.77       4.8 +/-    1.77  0.020 / 0.020
G15     299.3          16.3                2.5 +/-    2.27       5.9 +/-    2.27  0.040 / 0.080
G17     238.7          70.2                3.9 +/-    0.30       4.1 +/-    0.30  0.050 / 0.070
G19     226.6          45.2                4.3 +/-    1.65       5.8 +/-    1.65  0.060 / 0.090
G28     25.8           58.3                5.8 +/-    1.07       6.7 +/-    1.07  0.050 / 0.100
G30     137.8          54.4                6.0 +/-    0.50       7.2 +/-    0.50  0.080 / 0.100