PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-17:58:00
G01     126.8          11.1                8.8 +/-   15.45      24.1 +/-   15.45  0.030 / 0.040
G07     67.5           66.0               10.4 +/-    0.53      11.2 +/-    0.53  0.030 / 0.040
G08     50.5           39.4                8.5 +/-    1.08      12.5 +/-    1.08  0.030 / 0.030
G09     179.0          37.9               12.4 +/-    0.88      18.7 +/-    0.88  0.030 / 0.030
G11     117.3          35.8               11.5 +/-    1.17      18.0 +/-    1.17  0.110 / 0.090
G13     320.9          12.1               -3.0 +/-   17.55      -7.9 +/-   17.55  0.120 / 0.090
G17     199.3          14.7                9.3 +/-    4.29      23.4 +/-    4.29  0.120 / 0.380
G18     102.0          16.4                9.8 +/-    2.53      23.6 +/-    2.53  0.130 / 0.290
G28     270.6          49.1               10.9 +/-    3.18      13.9 +/-    3.18  0.170 / 0.440
G30     334.9          61.9                9.5 +/-    0.65      10.6 +/-    0.65  0.110 / 0.350