PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/12-23:27:40
G10     265.3          37.3               12.7 +/-    1.61      19.3 +/-    1.61  0.170 / 0.270
G13     42.6           19.4                7.7 +/-    2.57      17.2 +/-    2.57  0.220 / 0.180
G15     63.8           52.9               10.3 +/-    0.71      12.5 +/-    0.71  0.050 / 0.040
G16     278.9          12.9               10.9 +/-    1.41      28.5 +/-    1.41  0.050 / 0.050
G20     268.7          33.2               17.2 +/-    0.92      28.2 +/-    0.92  0.120 / 0.110
G21     356.1          70.3                9.1 +/-    0.70       9.6 +/-    0.70  0.110 / 0.070
G24     120.2          13.4               11.1 +/-    2.77      28.7 +/-    2.77  0.180 / 0.310
G27     319.5          17.4                9.5 +/-    2.14      22.4 +/-    2.14  0.170 / 0.290
G29     168.2          34.1               12.1 +/-    1.38      19.5 +/-    1.38  0.140 / 0.270