PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-22:42:30
G03     227.0          65.3                8.2 +/-    1.22       9.0 +/-    1.22  0.030 / 0.050
G09     305.6          20.7                6.3 +/-    1.22      13.7 +/-    1.22  0.040 / 0.050
G14     103.2          11.7               10.1 +/-    3.30      27.0 +/-    3.30  0.050 / 0.050
G16     124.8          61.8               10.7 +/-    0.38      12.0 +/-    0.38  0.040 / 0.040
G22     192.8          51.4                9.4 +/-    0.57      11.7 +/-    0.57  0.030 / 0.030
G23     322.3          52.2                8.6 +/-    0.69      10.5 +/-    0.69  0.040 / 0.030
G26     64.4           50.5                7.4 +/-    0.96       9.2 +/-    0.96  0.240 / 0.220
G31     54.0           17.6                6.8 +/-    3.87      15.9 +/-    3.87  0.200 / 0.160