PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/24-09:42:40
G02     330.0          81.2                4.9 +/-    0.45       5.0 +/-    0.45  0.090 / 0.120
G05     166.6          28.7                6.1 +/-    1.19      11.1 +/-    1.19  0.080 / 0.100
G06     39.0           50.5                4.0 +/-    0.65       5.0 +/-    0.65  0.150 / 0.200
G12     317.2          64.4                5.1 +/-    0.67       5.6 +/-    0.67  0.110 / 0.240
G17     82.8           13.7                5.9 +/-    1.59      15.3 +/-    1.59  0.030 / 0.030
G19     71.4           29.3                6.1 +/-    2.28      10.9 +/-    2.28  0.030 / 0.030
G24     233.6          26.4                5.4 +/-    1.67      10.1 +/-    1.67  0.040 / 0.030
G25     317.8          24.5                4.1 +/-    1.54       8.1 +/-    1.54  0.060 / 0.040