PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-19:27:50
G01     86.6           32.1               10.6 +/-    0.92      17.8 +/-    0.92  0.030 / 0.030
G07     128.4          36.8               11.6 +/-    0.72      17.9 +/-    0.72  0.030 / 0.030
G11     64.4           38.4                9.8 +/-    1.51      14.6 +/-    1.51  0.050 / 0.080
G13     290.9          37.6               13.1 +/-    3.01      19.9 +/-    3.01  0.040 / 0.080
G15     312.9          11.5                8.0 +/-    3.38      21.5 +/-    3.38  0.040 / 0.060
G17     215.4          56.6               13.3 +/-    0.78      15.6 +/-    0.78  0.050 / 0.050
G18     59.2           22.3                9.0 +/-    1.18      18.7 +/-    1.18  0.100 / 0.250
G19     215.1          29.8               13.2 +/-    1.53      23.2 +/-    1.53  0.090 / 0.250
G28     344.1          61.6                9.5 +/-    0.75      10.7 +/-    0.75  0.050 / 0.110
G30     114.5          72.3               12.2 +/-    0.65      12.7 +/-    0.65  0.050 / 0.110