PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-10:58:10
G01     298.7          38.5                7.9 +/-    2.01      11.7 +/-    2.01  0.120 / 0.090
G03     310.4          16.4                1.1 +/-   18.23       2.6 +/-   18.23  0.080 / 0.080
G10     114.0          32.7                7.1 +/-    1.45      11.8 +/-    1.45  0.060 / 0.080
G11     271.4          27.2                7.5 +/-    1.08      14.0 +/-    1.08  0.060 / 0.090
G14     14.6           62.4                6.2 +/-    0.99       6.8 +/-    0.99  0.060 / 0.080
G18     260.1          50.2                8.2 +/-    8.31      10.3 +/-    8.31  0.060 / 0.090
G22     313.5          37.1                5.9 +/-    0.76       9.0 +/-    0.76  0.110 / 0.210
G25     73.3           17.8                4.2 +/-    1.78       9.8 +/-    1.78  0.100 / 0.200
G31     156.0          72.9                8.0 +/-    0.55       8.4 +/-    0.55  0.050 / 0.060
G32     39.6           50.7                5.4 +/-    0.88       6.7 +/-    0.88  0.050 / 0.050