PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-09:27:50
G02     228.2          72.3                7.5 +/-    0.44       7.8 +/-    0.44  0.190 / 0.380
G05     174.4          10.9               -5.0 +/-   14.13     -13.7 +/-   14.13  0.180 / 0.350
G06     43.6           70.7                5.9 +/-    0.56       6.3 +/-    0.56  0.040 / 0.040
G12     320.7          44.3                6.9 +/-    0.55       9.4 +/-    0.55  0.040 / 0.050
G17     66.8           25.2                5.3 +/-    1.92      10.2 +/-    1.92  0.080 / 0.090
G19     52.3           41.4                4.8 +/-    0.60       6.8 +/-    0.60  0.040 / 0.090
G24     253.7          38.0                6.4 +/-    2.45       9.7 +/-    2.45  0.030 / 0.020