PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-09:12:30
G02     215.2          61.8                9.3 +/-    1.38      10.4 +/-    1.38  0.160 / 0.280
G06     70.3           80.2                6.5 +/-    0.49       6.6 +/-    0.49  0.220 / 0.370
G12     318.2          34.4                4.6 +/-    0.96       7.3 +/-    0.96  0.090 / 0.060
G17     58.1           31.6                3.9 +/-    1.31       6.5 +/-    1.31  0.100 / 0.110
G19     40.9           48.2                3.5 +/-    0.72       4.5 +/-    0.72  0.020 / 0.020
G24     267.4          41.4                7.7 +/-    1.40      11.0 +/-    1.40  0.020 / 0.020
G28     123.0          13.0                6.5 +/-    1.96      17.1 +/-    1.96  0.040 / 0.040