PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-10:58:00
G01     43.9           20.0                3.2 +/-    0.96       7.0 +/-    0.96  0.050 / 0.100
G06     174.9          32.3                5.3 +/-    0.97       8.8 +/-    0.97  0.080 / 0.090
G11     43.7           11.2                2.1 +/-    1.99       5.8 +/-    1.99  0.150 / 0.360
G13     242.3          27.1                7.1 +/-    2.09      13.3 +/-    2.09  0.160 / 0.320
G15     277.6          14.1                4.8 +/-    1.90      12.2 +/-    1.90  0.030 / 0.030
G17     335.0          76.3                5.4 +/-    0.76       5.6 +/-    0.76  0.040 / 0.030
G19     260.8          67.0                5.1 +/-    0.60       5.5 +/-    0.60  0.090 / 0.200
G24     318.4          12.3                0.2 +/-    2.80       0.6 +/-    2.80  0.090 / 0.190
G28     52.9           54.9                3.4 +/-    0.44       4.1 +/-    0.44  0.040 / 0.050
G30     153.0          36.2                6.0 +/-    1.41       9.3 +/-    1.41  0.050 / 0.040