PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-09:58:00
G01     319.9          16.4                4.5 +/-    2.01      10.7 +/-    2.01  0.120 / 0.270
G08     259.4          14.7                6.0 +/-    2.95      14.9 +/-    2.95  0.120 / 0.280
G10     76.3           53.5                4.4 +/-    0.61       5.3 +/-    0.61  0.040 / 0.030
G11     304.7          22.3                4.7 +/-    1.45       9.7 +/-    1.45  0.040 / 0.030
G14     290.0          70.7                3.4 +/-    0.76       3.6 +/-    0.76  0.050 / 0.050
G18     305.9          40.4                5.1 +/-    2.19       7.3 +/-    2.19  0.040 / 0.050
G20     103.3          30.7                4.7 +/-    0.94       8.1 +/-    0.94  0.030 / 0.020
G27     227.3          11.1                5.4 +/-    1.14      14.7 +/-    1.14  0.030 / 0.030
G31     177.2          38.3                5.0 +/-    1.13       7.5 +/-    1.13  0.290 / 0.290
G32     346.7          71.5                3.9 +/-    1.00       4.1 +/-    1.00  0.260 / 0.310