PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-21:12:50
G01     320.0          16.4                9.5 +/-    1.88      22.9 +/-    1.88  0.290 / 0.420
G08     262.4          15.6                8.4 +/-    5.43      20.7 +/-    5.43  0.240 / 0.410
G10     74.4           53.6                8.8 +/-    0.41      10.7 +/-    0.41  0.040 / 0.050
G11     308.7          18.8                7.6 +/-    1.47      17.2 +/-    1.47  0.040 / 0.040
G14     275.4          66.8                3.0 +/-    0.86       3.2 +/-    0.86  0.210 / 0.300
G20     102.7          30.2                9.1 +/-    1.99      15.9 +/-    1.99  0.170 / 0.320
G27     226.9          12.0               10.4 +/-    3.88      27.7 +/-    3.88  0.230 / 0.450
G31     176.1          37.8                9.2 +/-    0.77      13.9 +/-    0.77  0.170 / 0.390
G32     1.3            70.1                8.8 +/-    0.34       9.3 +/-    0.34  0.040 / 0.070