PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-23:58:10
G10     259.9          35.0               11.5 +/-    1.72      18.2 +/-    1.72  0.040 / 0.040
G13     45.4           22.5                7.3 +/-    1.94      15.0 +/-    1.94  0.040 / 0.050
G15     67.7           53.2                9.9 +/-    0.83      12.0 +/-    0.83  0.100 / 0.240
G16     286.6          14.3                8.4 +/-    1.67      21.2 +/-    1.67  0.080 / 0.210
G20     284.7          56.4               10.4 +/-    1.87      12.2 +/-    1.87  0.220 / 0.250
G21     347.6          66.6                9.6 +/-    0.72      10.3 +/-    0.72  0.140 / 0.210
G24     126.9          10.0              -13.7 +/-   25.66     -38.3 +/-   25.66  0.040 / 0.050
G26     259.5          11.2               10.1 +/-    4.63      27.5 +/-    4.63  0.030 / 0.030
G27     321.6          12.5                5.4 +/-   12.90      14.4 +/-   12.90  0.220 / 0.340
G29     165.6          38.3               11.2 +/-    1.12      16.8 +/-    1.12  0.230 / 0.380