PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-01:27:50
G01     65.3           32.0                5.4 +/-    0.37       9.0 +/-    0.37  0.020 / 0.040
G07     140.1          26.9                9.2 +/-    1.43      17.2 +/-    1.43  0.030 / 0.030
G11     52.3           29.7                5.1 +/-    2.00       9.0 +/-    2.00  0.050 / 0.100
G13     269.3          36.4                8.5 +/-    1.07      13.2 +/-    1.07  0.040 / 0.080
G15     297.6          16.5                7.3 +/-    1.93      17.5 +/-    1.93  0.040 / 0.040
G17     242.4          71.2                8.0 +/-    0.58       8.5 +/-    0.58  0.040 / 0.050
G19     228.3          46.7                9.9 +/-    1.22      13.1 +/-    1.22  0.060 / 0.110
G28     29.0           57.8                5.2 +/-    1.08       6.1 +/-    1.08  0.050 / 0.120
G30     139.4          52.8                7.5 +/-    0.79       9.2 +/-    0.79  0.050 / 0.110