PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-23:58:00
G10     244.3          21.2               14.3 +/-    1.81      30.7 +/-    1.81  0.110 / 0.560
G13     61.3           33.5                9.8 +/-    0.89      16.0 +/-    0.89  0.130 / 0.470
G15     107.3          58.0               12.1 +/-    0.55      13.9 +/-    0.55  0.090 / 0.180
G16     301.9          15.8                7.5 +/-    3.83      18.2 +/-    3.83  0.080 / 0.180
G20     252.5          27.9               10.5 +/-    1.54      19.2 +/-    1.54  0.040 / 0.060
G21     323.9          54.1               11.1 +/-    1.65      13.3 +/-    1.65  0.040 / 0.060
G26     273.8          18.5               10.5 +/-    0.96      24.0 +/-    0.96  0.030 / 0.050
G29     162.8          60.0               11.4 +/-    1.29      12.9 +/-    1.29  0.030 / 0.040