PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/25-21:58:10
G03     234.9          67.5                8.4 +/-    0.50       9.0 +/-    0.50  0.120 / 0.400
G09     304.7          20.9                8.3 +/-    1.00      17.8 +/-    1.00  0.110 / 0.360
G14     100.9          12.8               10.3 +/-    3.10      26.9 +/-    3.10  0.060 / 0.070
G16     126.7          59.4               11.6 +/-    0.61      13.2 +/-    0.61  0.060 / 0.070
G22     194.9          54.0                9.4 +/-    0.41      11.4 +/-    0.41  0.040 / 0.040
G23     318.7          48.3                9.1 +/-    1.15      11.7 +/-    1.15  0.050 / 0.050
G26     70.5           53.1                8.2 +/-    0.40      10.0 +/-    0.40  0.030 / 0.050
G31     51.7           22.4                6.5 +/-    2.89      13.4 +/-    2.89  0.030 / 0.040