PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-23:58:10
G10     257.2          31.9               11.6 +/-    1.98      19.5 +/-    1.98  0.140 / 0.390
G13     47.5           25.2                8.4 +/-    0.84      16.2 +/-    0.84  0.120 / 0.450
G15     76.2           57.0                8.3 +/-    0.22       9.7 +/-    0.22  0.130 / 0.440
G16     286.8          15.0                7.6 +/-    1.60      19.0 +/-    1.60  0.070 / 0.110
G20     264.2          34.1                8.2 +/-    1.01      13.3 +/-    1.01  0.080 / 0.100
G21     342.1          64.7                7.6 +/-    0.92       8.3 +/-    0.92  0.040 / 0.050
G26     259.5          12.5               11.3 +/-    2.73      30.0 +/-    2.73  0.040 / 0.060
G27     322.0          10.9              -13.1 +/-   26.49     -36.0 +/-   26.49  0.040 / 0.080
G29     166.9          42.8               10.5 +/-    1.02      14.6 +/-    1.02  0.040 / 0.070