PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/28-21:57:50
G01     126.1          11.9                4.9 +/-   33.78      13.0 +/-   33.78  0.030 / 0.040
G07     66.0           67.0                7.7 +/-    0.53       8.3 +/-    0.53  0.030 / 0.040
G08     48.9           37.2                7.4 +/-    0.86      11.4 +/-    0.86  0.110 / 0.410
G09     178.2          35.8               10.7 +/-    1.33      16.8 +/-    1.33  0.090 / 0.340
G11     115.5          36.3                9.7 +/-    0.93      15.1 +/-    0.93  0.110 / 0.130
G13     320.7          12.8               -1.4 +/-   18.47      -3.8 +/-   18.47  0.090 / 0.130
G17     199.0          17.3               12.4 +/-    3.09      29.1 +/-    3.09  0.060 / 0.100
G18     99.5           16.9                9.5 +/-    2.22      22.4 +/-    2.22  0.070 / 0.100
G28     273.3          50.6                9.4 +/-    3.12      11.7 +/-    3.12  0.130 / 0.220
G30     333.6          61.3                7.0 +/-    0.63       7.9 +/-    0.63  0.110 / 0.250