PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-09:13:10
G01     38.4           12.2                2.2 +/-    1.83       5.9 +/-    1.83  0.060 / 0.120
G02     199.4          10.9               -1.0 +/-   11.67      -2.7 +/-   11.67  0.060 / 0.110
G06     172.3          43.3                7.5 +/-    1.17      10.4 +/-    1.17  0.140 / 0.320
G13     233.3          20.3                6.3 +/-    1.46      13.7 +/-    1.46  0.170 / 0.330
G15     266.6          11.0                4.3 +/-    3.04      11.7 +/-    3.04  0.170 / 0.280
G17     6.6            68.5                6.0 +/-    0.62       6.5 +/-    0.62  0.220 / 0.410
G19     292.8          72.0                6.5 +/-    0.46       6.8 +/-    0.46  0.100 / 0.190
G24     315.6          20.5                3.1 +/-    1.32       6.7 +/-    1.32  0.110 / 0.190
G28     68.0           51.1                4.8 +/-    0.83       6.0 +/-    0.83  0.040 / 0.080
G30     156.3          26.7                6.6 +/-    1.07      12.3 +/-    1.07  0.040 / 0.070