PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-09:27:50
G08     265.2          17.5                5.7 +/-    2.63      13.3 +/-    2.63  0.090 / 0.160
G10     66.1           56.5                4.3 +/-    0.91       5.1 +/-    0.91  0.110 / 0.170
G11     309.7          19.0                4.7 +/-    1.57      10.6 +/-    1.57  0.070 / 0.300
G14     272.3          68.2                5.6 +/-    0.97       5.9 +/-    0.97  0.110 / 0.310
G18     310.6          35.4                5.9 +/-    2.39       9.3 +/-    2.39  0.030 / 0.040
G20     97.6           35.0                5.4 +/-    0.92       8.5 +/-    0.92  0.030 / 0.040
G21     154.8          12.1                2.8 +/-    3.64       7.5 +/-    3.64  0.150 / 0.240
G27     231.7          15.2                3.2 +/-    1.36       8.0 +/-    1.36  0.120 / 0.310
G31     178.3          31.8                5.7 +/-    3.31       9.6 +/-    3.31  0.050 / 0.070
G32     327.0          74.0                6.3 +/-    0.56       6.5 +/-    0.56  0.040 / 0.060