PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-19:12:50
G01     114.0          20.8               11.8 +/-    1.63      25.4 +/-    1.63  0.040 / 0.040
G07     99.0           58.0               13.3 +/-    0.77      15.4 +/-    0.77  0.050 / 0.040
G08     43.0           26.3                9.4 +/-    2.56      17.8 +/-    2.56  0.120 / 0.200
G09     176.9          22.2               11.4 +/-    1.38      23.9 +/-    1.38  0.110 / 0.210
G11     98.1           42.1               12.9 +/-    1.14      18.1 +/-    1.14  0.060 / 0.070
G13     314.6          24.1                9.5 +/-    1.16      19.0 +/-    1.16  0.050 / 0.060
G17     202.2          30.4               12.0 +/-    1.38      20.9 +/-    1.38  0.090 / 0.220
G18     86.4           22.2               10.9 +/-    2.41      22.7 +/-    2.41  0.090 / 0.240
G28     295.0          56.7               10.5 +/-    1.09      12.4 +/-    1.09  0.040 / 0.030
G30     1.8            73.8               11.5 +/-    0.67      11.9 +/-    0.67  0.030 / 0.030