PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-07:27:50
G01     51.6           26.5                3.9 +/-    1.69       7.3 +/-    1.69  0.070 / 0.110
G06     178.3          22.7                5.5 +/-    1.43      11.3 +/-    1.43  0.060 / 0.120
G07     145.3          12.6                4.5 +/-    0.95      11.7 +/-    0.95  0.110 / 0.150
G11     44.5           15.3                3.5 +/-    1.73       8.6 +/-    1.73  0.110 / 0.160
G13     252.0          31.7                5.4 +/-    2.49       9.1 +/-    2.49  0.040 / 0.050
G15     287.8          15.2                2.8 +/-    1.47       6.9 +/-    1.47  0.050 / 0.060
G17     318.9          79.5                7.6 +/-    0.52       7.7 +/-    0.52  0.020 / 0.020
G19     241.9          55.4                5.7 +/-    2.90       6.8 +/-    2.90  0.030 / 0.020
G28     47.1           54.7                7.0 +/-    0.61       8.4 +/-    0.61  0.040 / 0.040
G30     149.3          45.0                8.1 +/-    1.07      10.9 +/-    1.07  0.050 / 0.050