PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-22:58:10
G05     51.8           10.3                8.7 +/-    2.85      24.1 +/-    2.85  0.060 / 0.070
G10     241.5          19.9               11.7 +/-    3.72      25.8 +/-    3.72  0.040 / 0.070
G13     64.8           33.8               10.5 +/-    1.05      17.1 +/-    1.05  0.080 / 0.120
G15     109.2          56.5               12.7 +/-    0.70      14.9 +/-    0.70  0.070 / 0.090
G16     307.4          14.4                5.4 +/-    4.08      13.6 +/-    4.08  0.040 / 0.040
G20     256.2          42.6               11.6 +/-    1.69      16.2 +/-    1.69  0.030 / 0.040
G21     321.0          51.7               10.6 +/-    0.74      13.1 +/-    0.74  0.080 / 0.440
G26     279.7          18.9                8.7 +/-    0.97      19.8 +/-    0.97  0.080 / 0.430
G29     158.3          62.5               12.3 +/-    0.32      13.7 +/-    0.32  0.110 / 0.200