PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-21:42:40
G01     221.7          12.8                9.3 +/-    3.13      24.4 +/-    3.13  0.150 / 0.360
G03     269.1          70.1                8.7 +/-    0.50       9.2 +/-    0.50  0.200 / 0.410
G09     298.3          13.2                9.5 +/-    2.67      24.8 +/-    2.67  0.090 / 0.240
G14     92.1           19.7                5.3 +/-    1.07      11.8 +/-    1.07  0.090 / 0.310
G16     142.2          50.2               11.6 +/-    0.72      14.6 +/-    0.72  0.040 / 0.050
G22     205.6          65.1               10.0 +/-    0.38      11.0 +/-    0.38  0.040 / 0.040
G23     310.7          40.0                7.9 +/-    0.92      11.5 +/-    0.92  0.040 / 0.080
G26     90.2           55.7                9.0 +/-    0.72      10.6 +/-    0.72  0.050 / 0.060
G31     46.6           30.9                6.5 +/-    0.39      11.2 +/-    0.39  0.040 / 0.030