PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-21:58:10
G01     221.9          12.9                8.5 +/-    4.07      22.3 +/-    4.07  0.230 / 0.400
G03     269.9          70.0                8.4 +/-    0.51       8.9 +/-    0.51  0.130 / 0.420
G09     298.2          13.2               10.2 +/-    2.67      26.6 +/-    2.67  0.050 / 0.060
G14     92.0           19.8                9.9 +/-    1.59      21.9 +/-    1.59  0.050 / 0.070
G16     142.1          50.1               11.8 +/-    0.52      14.9 +/-    0.52  0.110 / 0.280
G22     206.1          65.3                8.3 +/-    0.39       9.1 +/-    0.39  0.090 / 0.240
G23     310.6          39.8                8.2 +/-    0.85      12.0 +/-    0.85  0.040 / 0.050
G26     90.2           55.6                8.7 +/-    0.80      10.4 +/-    0.80  0.030 / 0.050
G31     46.6           30.8                7.5 +/-    0.72      12.8 +/-    0.72  0.040 / 0.050