PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-03:27:50
G01     64.6           31.9                3.5 +/-    0.60       5.8 +/-    0.60  0.040 / 0.060
G07     140.3          26.1                7.9 +/-    0.97      15.1 +/-    0.97  0.030 / 0.050
G11     51.4           28.3                2.5 +/-    0.74       4.6 +/-    0.74  0.050 / 0.100
G13     268.8          36.2                6.3 +/-    1.06       9.8 +/-    1.06  0.060 / 0.100
G15     297.0          16.6                4.7 +/-    1.41      11.3 +/-    1.41  0.100 / 0.200
G17     245.4          73.0                6.8 +/-    0.61       7.1 +/-    0.61  0.100 / 0.200
G19     228.9          47.8                6.8 +/-    1.09       8.8 +/-    1.09  0.030 / 0.030
G28     30.1           57.6                2.6 +/-    0.92       3.0 +/-    0.92  0.030 / 0.030
G30     139.9          52.8                6.1 +/-    0.81       7.4 +/-    0.81  0.040 / 0.110