PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-14:43:00
G10     295.0          51.3                4.1 +/-    0.92       5.1 +/-    0.92  0.040 / 0.040
G15     46.6           30.6                2.5 +/-    0.71       4.3 +/-    0.71  0.030 / 0.040
G20     348.0          65.4                3.3 +/-    0.43       3.6 +/-    0.43  0.080 / 0.140
G21     97.7           71.6                4.9 +/-    0.75       5.2 +/-    0.75  0.080 / 0.120
G24     95.6           25.3                6.1 +/-    1.66      11.8 +/-    1.66  0.040 / 0.040
G27     305.0          31.4                5.0 +/-    2.07       8.6 +/-    2.07  0.040 / 0.050
G32     209.9          28.6                6.3 +/-    0.72      11.4 +/-    0.72  0.070 / 0.090