PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-20:57:50
G10     260.5          34.3                9.6 +/-    1.85      15.5 +/-    1.85  0.040 / 0.040
G13     45.2           22.8                7.8 +/-    2.12      16.1 +/-    2.12  0.060 / 0.040
G15     73.8           57.5                9.2 +/-    0.49      10.7 +/-    0.49  0.120 / 0.320
G16     284.4          14.1                7.1 +/-    1.64      18.2 +/-    1.64  0.200 / 0.420
G20     286.0          57.2                9.1 +/-    1.61      10.7 +/-    1.61  0.130 / 0.340
G21     349.6          67.6                9.8 +/-    0.93      10.5 +/-    0.93  0.120 / 0.290
G24     123.2          10.8               11.8 +/-    3.27      32.4 +/-    3.27  0.240 / 0.280
G26     257.9          10.8                8.2 +/-    2.58      22.4 +/-    2.58  0.250 / 0.370
G27     321.4          12.9                4.5 +/-   15.10      11.9 +/-   15.10  0.150 / 0.230
G29     167.2          38.6               10.8 +/-    1.14      16.1 +/-    1.14  0.200 / 0.190