PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/21-17:57:40
G10     247.4          24.3               12.0 +/-    1.44      23.8 +/-    1.44  0.040 / 0.060
G13     57.1           31.6               10.4 +/-    0.95      17.6 +/-    0.95  0.060 / 0.060
G15     101.1          59.2               12.6 +/-    0.42      14.5 +/-    0.42  0.210 / 0.730
G16     299.5          15.5                7.0 +/-    4.50      17.1 +/-    4.50  0.170 / 0.720
G20     264.9          48.3               11.7 +/-    1.06      15.1 +/-    1.06  0.050 / 0.150
G21     330.7          58.2                9.7 +/-    0.82      11.2 +/-    0.82  0.050 / 0.150
G26     272.3          16.9               10.2 +/-    1.85      24.3 +/-    1.85  0.030 / 0.040
G29     163.1          54.3               13.6 +/-    1.81      16.3 +/-    1.81  0.030 / 0.040