PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-23:57:50
G10     263.2          37.2               11.8 +/-    2.38      18.0 +/-    2.38  0.120 / 0.480
G13     43.5           20.2                8.1 +/-    2.13      17.6 +/-    2.13  0.100 / 0.500
G15     63.3           51.2                9.5 +/-    0.96      11.8 +/-    0.96  0.050 / 0.040
G16     283.4          13.5                7.0 +/-    1.76      18.1 +/-    1.76  0.040 / 0.040
G20     290.1          58.0               10.3 +/-    1.32      11.9 +/-    1.32  0.170 / 0.330
G21     353.3          68.8                9.5 +/-    0.70      10.2 +/-    0.70  0.150 / 0.250
G24     124.4          11.9               10.3 +/-    2.81      27.5 +/-    2.81  0.160 / 0.210
G27     320.6          15.1                7.4 +/-    1.85      18.4 +/-    1.85  0.170 / 0.230
G29     166.2          34.8               10.6 +/-    0.86      16.9 +/-    0.86  0.110 / 0.100