PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/08-13:28:00
G02     64.9           27.5                0.8 +/-    1.19       1.4 +/-    1.19  0.030 / 0.030
G05     52.4           57.0                3.7 +/-    0.52       4.3 +/-    0.52  0.030 / 0.030
G12     185.2          28.2                3.8 +/-    1.00       6.9 +/-    1.00  0.040 / 0.040
G13     125.2          18.7                7.1 +/-    1.31      16.2 +/-    1.31  0.040 / 0.030
G15     159.7          16.9                5.8 +/-    1.43      13.8 +/-    1.43  0.080 / 0.090
G20     212.6          63.5                5.6 +/-    0.80       6.2 +/-    0.80  0.080 / 0.110
G21     277.6          25.0                3.9 +/-    1.95       7.7 +/-    1.95  0.080 / 0.170
G25     229.1          47.7                3.5 +/-    3.46       4.5 +/-    3.46  0.090 / 0.210
G29     336.8          64.0                2.7 +/-    0.39       3.0 +/-    0.39  0.190 / 0.170