PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/07-18:57:30
G03     231.3          67.7                9.0 +/-    0.51       9.7 +/-    0.51  0.040 / 0.030
G07     249.1          10.9               -5.6 +/-   12.62     -15.2 +/-   12.62  0.040 / 0.040
G09     304.0          19.1                8.0 +/-    1.32      18.0 +/-    1.32  0.030 / 0.040
G14     100.7          12.9               10.0 +/-    3.49      26.3 +/-    3.49  0.040 / 0.040
G16     131.8          58.6               10.8 +/-    0.49      12.4 +/-    0.49  0.130 / 0.330
G22     193.0          53.3                9.6 +/-    0.79      11.7 +/-    0.79  0.110 / 0.360
G23     318.7          48.3                9.3 +/-    0.62      11.9 +/-    0.62  0.120 / 0.390
G26     74.4           55.0                8.4 +/-    0.79      10.0 +/-    0.79  0.100 / 0.140
G31     51.7           22.3                7.0 +/-    3.09      14.6 +/-    3.09  0.080 / 0.160