PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-23:28:00
G03     228.2          65.4                6.2 +/-    1.74       6.8 +/-    1.74  0.040 / 0.060
G07     250.6          10.0               -9.2 +/-    8.07     -25.7 +/-    8.07  0.060 / 0.060
G09     305.6          20.8                6.7 +/-    1.20      14.5 +/-    1.20  0.070 / 0.210
G14     103.3          11.5                6.3 +/-    3.52      17.0 +/-    3.52  0.060 / 0.130
G16     126.2          61.7               10.0 +/-    0.72      11.1 +/-    0.72  0.050 / 0.160
G22     193.1          51.6                9.1 +/-    0.83      11.2 +/-    0.83  0.030 / 0.040
G23     322.1          51.9                6.9 +/-    1.13       8.5 +/-    1.13  0.030 / 0.060
G26     64.9           50.9                4.3 +/-    0.95       5.3 +/-    0.95  0.140 / 0.250
G31     53.9           18.0                4.2 +/-    0.51       9.7 +/-    0.51  0.130 / 0.260