PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-03:12:50
G08     265.3          18.1                9.6 +/-    0.91      22.2 +/-    0.91  0.130 / 0.290
G10     60.2           59.1                6.1 +/-    0.65       6.9 +/-    0.65  0.110 / 0.320
G11     309.9          19.2                8.9 +/-    2.58      20.1 +/-    2.58  0.030 / 0.040
G14     270.7          67.9                7.1 +/-    0.59       7.6 +/-    0.59  0.030 / 0.040
G18     91.4           37.1                6.8 +/-    0.61      10.4 +/-    0.61  0.160 / 0.460
G21     154.2          14.7                9.8 +/-    3.10      24.5 +/-    3.10  0.190 / 0.480
G24     40.2           11.2                7.4 +/-    2.03      20.1 +/-    2.03  0.040 / 0.050
G27     230.2          15.2               10.4 +/-    1.65      25.8 +/-    1.65  0.030 / 0.060
G31     178.8          30.0               11.0 +/-    1.20      19.3 +/-    1.20  0.120 / 0.210
G32     333.1          74.2                8.2 +/-    0.63       8.5 +/-    0.63  0.110 / 0.210