PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-21:57:40
G01     219.7          10.7               10.2 +/-    2.46      27.9 +/-    2.46  0.180 / 0.420
G03     259.0          70.2                7.7 +/-    0.75       8.1 +/-    0.75  0.230 / 0.350
G09     300.2          15.4                6.5 +/-    1.64      16.1 +/-    1.64  0.040 / 0.040
G14     94.7           17.8                7.7 +/-    0.88      18.0 +/-    0.88  0.040 / 0.040
G16     138.5          53.1               10.8 +/-    0.56      13.2 +/-    0.56  0.050 / 0.050
G22     201.8          62.1                8.8 +/-    0.38       9.8 +/-    0.38  0.050 / 0.050
G23     312.9          42.2                8.3 +/-    1.21      11.6 +/-    1.21  0.130 / 0.210
G26     84.1           55.4                8.0 +/-    1.17       9.5 +/-    1.17  0.100 / 0.250
G31     48.0           28.3                5.7 +/-    1.40      10.4 +/-    1.40  0.070 / 0.070