PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-15:58:00
G08     313.9          17.1                6.6 +/-    2.06      15.7 +/-    2.06  0.040 / 0.050
G10     319.7          57.9                6.6 +/-    0.84       7.7 +/-    0.84  0.040 / 0.050
G14     214.4          24.7                8.6 +/-    1.11      17.0 +/-    1.11  0.040 / 0.030
G15     45.9           17.4                5.3 +/-    2.15      12.4 +/-    2.15  0.030 / 0.030
G20     23.5           62.9                7.0 +/-    1.85       7.7 +/-    1.85  0.050 / 0.080
G21     126.6          60.1                9.7 +/-    0.46      11.0 +/-    0.46  0.060 / 0.090
G24     77.9           28.4                7.9 +/-    0.86      14.2 +/-    0.86  0.200 / 0.290
G27     287.4          36.5                7.5 +/-    1.53      11.6 +/-    1.53  0.150 / 0.240
G32     217.6          44.1                8.9 +/-    0.90      12.2 +/-    0.90  0.170 / 0.250