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               13.6 +/-    2.20      29.1 +/-    2.20  0.030 / 0.050
G13     61.3           33.5               11.2 +/-    1.77      18.3 +/-    1.77  0.050 / 0.070
G15     107.3          58.0               13.8 +/-    0.30      16.0 +/-    0.30  0.120 / 0.460
G16     301.9          15.8                8.2 +/-    1.11      19.9 +/-    1.11  0.150 / 0.430
G20     252.5          27.9               10.2 +/-    2.23      18.7 +/-    2.23  0.070 / 0.100
G21     323.9          54.1               11.4 +/-    0.45      13.8 +/-    0.45  0.070 / 0.110
G26     273.8          18.5               11.4 +/-    2.00      26.1 +/-    2.00  0.030 / 0.030
G29     162.8          60.0               13.4 +/-    0.47      15.3 +/-    0.47  0.030 / 0.030