PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-18:27:50
G01     115.6          19.7               10.7 +/-    2.10      23.7 +/-    2.10  0.030 / 0.030
G07     96.3           58.9               11.9 +/-    0.92      13.7 +/-    0.92  0.030 / 0.030
G08     43.6           28.1                7.6 +/-    1.80      13.8 +/-    1.80  0.030 / 0.040
G09     177.2          24.0               11.6 +/-    1.18      23.2 +/-    1.18  0.030 / 0.040
G11     100.7          41.6               10.8 +/-    0.76      15.3 +/-    0.76  0.060 / 0.060
G13     315.6          22.8                8.5 +/-    1.71      17.5 +/-    1.71  0.060 / 0.050
G17     201.8          28.2               12.2 +/-    1.69      22.1 +/-    1.69  0.110 / 0.240
G18     88.5           21.8                9.5 +/-    1.33      20.1 +/-    1.33  0.080 / 0.250
G28     291.5          55.8               10.4 +/-    1.42      12.3 +/-    1.42  0.100 / 0.220
G30     358.2          72.7               11.4 +/-    0.71      11.9 +/-    0.71  0.080 / 0.190