PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-14:42:40
G01     128.8          10.2              -19.5 +/-   21.18     -54.0 +/-   21.18  0.030 / 0.040
G07     45.1           69.8               10.5 +/-    0.72      11.1 +/-    0.72  0.030 / 0.030
G08     52.5           41.7                9.8 +/-    0.78      13.9 +/-    0.78  0.040 / 0.060
G09     177.6          37.5               13.0 +/-    1.08      19.7 +/-    1.08  0.030 / 0.040
G11     120.6          34.0               11.1 +/-    0.92      18.0 +/-    0.92  0.170 / 0.400
G17     200.1          11.8                7.0 +/-   16.88      18.8 +/-   16.88  0.070 / 0.120
G18     105.8          15.5               11.8 +/-    0.97      29.0 +/-    0.97  0.060 / 0.110
G28     272.8          51.7                9.8 +/-    1.30      12.2 +/-    1.30  0.170 / 0.280
G30     330.1          58.4                8.8 +/-    0.78      10.2 +/-    0.78  0.110 / 0.290