PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/23-20:13:10
G01     293.9          39.3               11.5 +/-    5.81      16.9 +/-    5.81  0.090 / 0.090
G03     311.1          15.4                9.3 +/-    2.97      23.0 +/-    2.97  0.050 / 0.070
G10     117.7          31.2               10.8 +/-    0.96      18.4 +/-    0.96  0.080 / 0.120
G11     268.7          26.8               10.4 +/-    1.83      19.5 +/-    1.83  0.080 / 0.140
G14     20.5           60.2                8.6 +/-    1.13       9.7 +/-    1.13  0.020 / 0.020
G22     313.2          35.8                9.5 +/-    1.79      14.8 +/-    1.79  0.020 / 0.020
G25     69.2           18.8                9.8 +/-    2.02      22.2 +/-    2.02  0.040 / 0.050
G26     159.2          10.7               -8.2 +/-   39.44     -22.4 +/-   39.44  0.040 / 0.040
G31     147.6          77.0               11.0 +/-    0.81      11.3 +/-    0.81  0.040 / 0.050
G32     48.2           44.2                9.3 +/-    0.81      12.7 +/-    0.81  0.040 / 0.050