PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/27-14:58:10
G01     40.2           15.3                6.5 +/-    2.28      16.0 +/-    2.28  0.040 / 0.060
G06     173.8          39.5                9.7 +/-    0.66      14.3 +/-    0.66  0.040 / 0.080
G13     236.2          22.4               10.5 +/-    1.53      21.8 +/-    1.53  0.150 / 0.160
G15     270.7          12.0                9.3 +/-    2.92      24.9 +/-    2.92  0.100 / 0.240
G17     352.1          72.4                7.7 +/-    0.42       8.1 +/-    0.42  0.030 / 0.030
G19     280.2          70.5                8.4 +/-    0.92       8.9 +/-    0.92  0.030 / 0.030
G24     316.5          18.8                6.5 +/-    3.36      14.8 +/-    3.36  0.030 / 0.030
G28     65.3           51.3                7.2 +/-    1.25       8.9 +/-    1.25  0.040 / 0.040
G30     154.5          26.7                8.9 +/-    1.41      16.7 +/-    1.41  0.060 / 0.090