PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-16:58:10
G08     304.6          21.6                5.5 +/-    2.37      11.7 +/-    2.37  0.050 / 0.070
G10     340.5          61.2                6.7 +/-    0.81       7.5 +/-    0.81  0.030 / 0.050
G14     219.9          34.8                9.4 +/-    0.65      14.9 +/-    0.65  0.030 / 0.040
G20     44.6           58.7                7.9 +/-    0.56       9.0 +/-    0.56  0.040 / 0.040
G21     137.6          50.3               10.3 +/-    0.76      13.0 +/-    0.76  0.060 / 0.100
G24     65.4           27.2                6.3 +/-    1.02      11.7 +/-    1.02  0.050 / 0.100
G27     273.1          36.2               10.6 +/-    1.06      16.5 +/-    1.06  0.060 / 0.140
G32     226.5          55.0               10.4 +/-    0.91      12.4 +/-    0.91  0.060 / 0.130