PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-15:57:40
G08     305.1          21.3                6.6 +/-    1.30      14.2 +/-    1.30  0.080 / 0.090
G10     345.2          61.6                6.0 +/-    0.66       6.7 +/-    0.66  0.070 / 0.090
G14     220.1          30.7                8.5 +/-    2.65      14.7 +/-    2.65  0.070 / 0.240
G20     50.9           56.1                6.9 +/-    1.01       8.2 +/-    1.01  0.100 / 0.170
G21     138.4          51.9                9.7 +/-    1.15      11.9 +/-    1.15  0.040 / 0.060
G24     70.4           30.2                6.7 +/-    1.30      11.7 +/-    1.30  0.040 / 0.050
G27     269.0          37.1                8.0 +/-    2.40      12.2 +/-    2.40  0.150 / 0.220
G32     226.7          58.5                7.8 +/-    2.06       9.0 +/-    2.06  0.120 / 0.220