PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/27-22:57:40
G10     249.9          27.6               12.7 +/-    1.32      23.4 +/-    1.32  0.040 / 0.050
G13     53.7           29.2                9.9 +/-    2.06      17.7 +/-    2.06  0.040 / 0.040
G15     87.5           57.6               11.7 +/-    1.02      13.6 +/-    1.02  0.110 / 0.170
G16     297.0          15.5                9.2 +/-    1.49      22.5 +/-    1.49  0.110 / 0.160
G20     268.8          49.9               12.1 +/-    2.66      15.3 +/-    2.66  0.030 / 0.030
G21     332.4          58.9               11.0 +/-    0.93      12.6 +/-    0.93  0.030 / 0.040
G26     269.2          15.8               12.6 +/-    1.41      30.7 +/-    1.41  0.150 / 0.350
G29     162.9          50.6               13.0 +/-    0.48      16.2 +/-    0.48  0.130 / 0.390