PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-01:43:10
G01     65.5           32.1                6.1 +/-    0.75      10.2 +/-    0.75  0.040 / 0.050
G07     140.0          27.1                8.3 +/-    1.37      15.6 +/-    1.37  0.040 / 0.050
G11     52.3           29.7                6.3 +/-    1.57      11.1 +/-    1.57  0.030 / 0.040
G13     269.6          36.5                7.7 +/-    1.47      11.9 +/-    1.47  0.030 / 0.040
G15     297.7          16.5                5.9 +/-    2.44      14.2 +/-    2.44  0.050 / 0.070
G17     242.2          71.2                7.6 +/-    0.80       8.0 +/-    0.80  0.050 / 0.070
G19     228.1          46.6               10.5 +/-    0.74      13.8 +/-    0.74  0.060 / 0.110
G28     28.7           57.8                5.2 +/-    0.75       6.1 +/-    0.75  0.070 / 0.180
G30     139.2          52.8                7.8 +/-    1.08       9.6 +/-    1.08  0.050 / 0.120