PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-11:27:50
G02     200.6          17.8                4.4 +/-    1.98      10.3 +/-    1.98  0.080 / 0.140
G06     169.3          53.1                6.6 +/-    0.45       8.0 +/-    0.45  0.070 / 0.170
G13     226.8          14.3                5.4 +/-    2.43      13.8 +/-    2.43  0.030 / 0.030
G17     17.5           62.3                4.7 +/-    0.75       5.2 +/-    0.75  0.050 / 0.030
G19     324.4          71.8                4.3 +/-    1.00       4.5 +/-    1.00  0.040 / 0.030
G24     311.3          27.4                3.5 +/-    1.68       6.5 +/-    1.68  0.030 / 0.030
G28     80.6           46.4                5.1 +/-    0.74       6.7 +/-    0.74  0.040 / 0.040
G30     157.6          17.4                4.3 +/-    1.43      10.0 +/-    1.43  0.040 / 0.040