PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/19-12:57:40
G10     247.5          26.2                5.3 +/-    1.19      10.0 +/-    1.19  0.200 / 0.420
G13     56.3           30.4                5.8 +/-    1.29      10.1 +/-    1.29  0.150 / 0.390
G15     87.1           56.1                6.9 +/-    0.85       8.2 +/-    0.85  0.040 / 0.040
G16     298.7          16.0                5.3 +/-    1.43      13.0 +/-    1.43  0.040 / 0.040
G20     268.2          51.7                8.0 +/-    3.85       9.8 +/-    3.85  0.030 / 0.040
G21     331.9          58.3                3.9 +/-    0.76       4.5 +/-    0.76  0.030 / 0.040
G26     272.5          16.6                7.2 +/-    2.63      17.3 +/-    2.63  0.080 / 0.120
G29     162.5          55.5                7.9 +/-    0.45       9.4 +/-    0.45  0.100 / 0.130