PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-06:42:40
G08     318.2          12.9                2.9 +/-    1.38       7.7 +/-    1.38  0.040 / 0.050
G10     315.8          56.9                5.3 +/-    0.57       6.1 +/-    0.57  0.040 / 0.050
G14     214.7          18.1                7.0 +/-    2.16      16.1 +/-    2.16  0.180 / 0.380
G15     45.7           18.0                1.8 +/-    0.61       4.3 +/-    0.61  0.120 / 0.620
G20     52.1           51.3                5.4 +/-    0.66       6.7 +/-    0.66  0.150 / 0.240
G21     123.1          65.6                7.2 +/-    0.68       7.8 +/-    0.68  0.160 / 0.220
G24     84.0           29.6                4.7 +/-    0.45       8.3 +/-    0.45  0.030 / 0.050
G27     285.9          37.6                6.5 +/-    1.00       9.8 +/-    1.00  0.030 / 0.030
G32     216.5          45.5                9.8 +/-    0.50      13.1 +/-    0.50  0.070 / 0.080