PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-05:43:10
G10     286.1          48.4                3.8 +/-    2.04       4.9 +/-    2.04  0.170 / 0.080
G15     48.0           34.6                4.6 +/-    1.17       7.4 +/-    1.17  0.140 / 0.060
G20     331.8          64.9                4.1 +/-    0.56       4.5 +/-    0.56  0.040 / 0.040
G21     65.0           76.5                3.3 +/-    0.91       3.4 +/-    0.91  0.040 / 0.030
G24     106.0          22.7                5.4 +/-    1.80      11.2 +/-    1.80  0.080 / 0.120
G27     310.0          28.7                2.2 +/-    1.36       4.0 +/-    1.36  0.080 / 0.100
G29     166.6          12.8                3.7 +/-    1.85       9.6 +/-    1.85  0.080 / 0.120
G32     208.2          19.7                5.3 +/-    2.31      11.7 +/-    2.31  0.090 / 0.170