PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-10:27:50
G01     319.7          16.8                5.0 +/-    1.63      11.9 +/-    1.63  0.130 / 0.170
G08     258.7          14.4                5.9 +/-    2.23      14.9 +/-    2.23  0.180 / 0.230
G10     77.3           53.2                5.0 +/-    0.57       6.1 +/-    0.57  0.040 / 0.050
G11     304.2          22.6                3.8 +/-    1.91       7.8 +/-    1.91  0.050 / 0.050
G14     292.0          70.9                4.8 +/-    0.93       5.1 +/-    0.93  0.030 / 0.020
G18     305.3          40.9                5.1 +/-    1.88       7.3 +/-    1.88  0.030 / 0.020
G20     103.8          30.3                6.1 +/-    0.75      10.7 +/-    0.75  0.040 / 0.030
G27     226.9          10.7                4.7 +/-    5.53      13.0 +/-    5.53  0.040 / 0.030
G31     177.3          38.7                7.3 +/-    1.02      10.8 +/-    1.02  0.240 / 0.360
G32     346.4          71.4                4.7 +/-    1.00       5.0 +/-    1.00  0.370 / 0.310