PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/31-12:27:50
G01     41.9           17.6                3.3 +/-    3.67       7.8 +/-    3.67  0.210 / 0.300
G06     174.2          36.1                4.2 +/-    1.79       6.6 +/-    1.79  0.300 / 0.210
G13     239.0          24.7                4.7 +/-    2.28       9.2 +/-    2.28  0.030 / 0.030
G15     274.7          13.0                3.0 +/-    1.18       7.7 +/-    1.18  0.030 / 0.030
G17     343.9          74.5                2.9 +/-    0.35       3.0 +/-    0.35  0.030 / 0.030
G19     270.3          69.1                2.4 +/-    0.52       2.6 +/-    0.52  0.040 / 0.030
G24     317.6          15.5                0.6 +/-    2.05       1.4 +/-    2.05  0.070 / 0.090
G28     59.2           53.3                2.5 +/-    1.05       3.1 +/-    1.05  0.080 / 0.080
G30     154.0          31.7                4.7 +/-    0.89       8.0 +/-    0.89  0.090 / 0.270