PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/16-11:27:40
G01     40.4           15.7                2.6 +/-    2.27       6.3 +/-    2.27  0.040 / 0.070
G06     173.5          38.8                6.4 +/-    1.10       9.5 +/-    1.10  0.040 / 0.060
G13     236.9          23.1                4.2 +/-    4.86       8.7 +/-    4.86  0.070 / 0.100
G15     272.1          12.3                3.0 +/-    2.09       7.8 +/-    2.09  0.070 / 0.100
G17     353.7          72.5                7.1 +/-    0.60       7.4 +/-    0.60  0.030 / 0.030
G19     278.0          70.4                5.5 +/-    0.88       5.8 +/-    0.88  0.030 / 0.030
G24     317.0          17.4                5.4 +/-    1.17      12.7 +/-    1.17  0.090 / 0.300
G28     62.6           52.4                3.3 +/-    0.49       4.1 +/-    0.49  0.120 / 0.310
G30     154.9          29.8                5.3 +/-    1.01       9.3 +/-    1.01  0.050 / 0.040