PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-23:27:30
G03     228.2          65.4                7.1 +/-    0.91       7.7 +/-    0.91  0.050 / 0.050
G09     305.6          20.8                5.5 +/-    1.95      11.9 +/-    1.95  0.040 / 0.050
G14     103.3          11.5                7.1 +/-    2.24      19.2 +/-    2.24  0.040 / 0.040
G16     126.2          61.7               10.0 +/-    0.63      11.2 +/-    0.63  0.030 / 0.030
G22     193.1          51.6                9.1 +/-    0.38      11.2 +/-    0.38  0.220 / 0.310
G23     322.1          51.9                6.8 +/-    0.83       8.4 +/-    0.83  0.140 / 0.230
G26     64.9           50.9                5.2 +/-    1.25       6.5 +/-    1.25  0.130 / 0.220
G31     53.9           18.0                4.6 +/-    4.39      10.6 +/-    4.39  0.110 / 0.210