PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-14:42:40
G07     307.2          48.8                8.8 +/-    2.36      11.3 +/-    2.36  0.120 / 0.070
G08     132.6          36.8               12.5 +/-    1.00      19.1 +/-    1.00  0.070 / 0.110
G09     314.3          72.5                9.9 +/-    0.85      10.3 +/-    0.85  0.060 / 0.060
G16     42.0           30.8                8.0 +/-    1.58      13.8 +/-    1.58  0.060 / 0.060
G23     138.8          67.9               11.3 +/-    0.96      12.1 +/-    0.96  0.030 / 0.030
G27     87.7           37.0               11.0 +/-    1.06      16.9 +/-    1.06  0.030 / 0.030
G30     283.1          21.3                9.0 +/-    3.06      19.3 +/-    3.06  0.080 / 0.120