PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-04:27:50
G08     262.8          16.2               10.6 +/-    1.24      25.6 +/-    1.24  0.150 / 0.230
G10     69.6           56.3                9.0 +/-    0.53      10.5 +/-    0.53  0.230 / 0.250
G11     308.1          20.0                6.7 +/-    1.85      14.8 +/-    1.85  0.150 / 0.350
G14     274.2          66.8                9.6 +/-    0.56      10.4 +/-    0.56  0.180 / 0.350
G18     309.7          35.4                8.3 +/-    1.40      13.1 +/-    1.40  0.040 / 0.040
G20     90.2           49.5               12.0 +/-    1.02      15.2 +/-    1.02  0.030 / 0.040
G21     155.6          11.8                6.1 +/-    2.94      16.4 +/-    2.94  0.130 / 0.320
G27     228.5          12.8                9.9 +/-    1.80      25.8 +/-    1.80  0.120 / 0.340
G31     175.6          37.1               11.7 +/-    0.94      17.9 +/-    0.94  0.220 / 0.350
G32     358.8          70.8                9.5 +/-    0.66      10.0 +/-    0.66  0.190 / 0.350