PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-22:27:50
G10     250.2          26.6                7.9 +/-    1.61      14.8 +/-    1.61  0.030 / 0.040
G13     53.8           29.9                7.0 +/-    1.71      12.2 +/-    1.71  0.040 / 0.040
G15     93.5           59.3                8.5 +/-    0.73       9.7 +/-    0.73  0.150 / 0.390
G16     294.4          16.1                6.5 +/-    1.91      15.6 +/-    1.91  0.140 / 0.300
G20     254.0          19.5                4.2 +/-    2.53       9.4 +/-    2.53  0.100 / 0.130
G21     331.7          59.1                6.6 +/-    0.38       7.5 +/-    0.38  0.070 / 0.160
G26     266.6          15.9                7.6 +/-    2.02      18.4 +/-    2.02  0.030 / 0.040
G29     165.1          51.7                8.3 +/-    0.52      10.2 +/-    0.52  0.030 / 0.030