PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-14:57:40
G08     319.8          12.3                2.1 +/-    1.96       5.4 +/-    1.96  0.040 / 0.050
G10     305.3          54.5                4.8 +/-    0.91       5.8 +/-    0.91  0.040 / 0.040
G14     211.2          16.7                7.0 +/-    3.01      16.6 +/-    3.01  0.110 / 0.150
G15     45.7           24.5                2.8 +/-    1.10       5.6 +/-    1.10  0.090 / 0.120
G20     4.3            64.8                4.5 +/-    0.63       4.9 +/-    0.63  0.110 / 0.230
G21     113.4          66.8                4.7 +/-    1.03       5.1 +/-    1.03  0.090 / 0.230
G24     88.1           27.3                7.5 +/-    0.70      14.0 +/-    0.70  0.040 / 0.040
G27     297.9          34.3                5.8 +/-    1.06       9.3 +/-    1.06  0.040 / 0.040
G32     212.8          35.2                7.1 +/-    1.66      11.2 +/-    1.66  0.070 / 0.090