PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-21:13:00
G03     261.3          70.1               10.9 +/-    0.44      11.5 +/-    0.44  0.040 / 0.040
G09     301.6          18.9               10.5 +/-    1.49      23.7 +/-    1.49  0.030 / 0.050
G14     92.8           21.6               10.8 +/-    1.31      22.8 +/-    1.31  0.120 / 0.270
G16     132.7          53.9               15.0 +/-    0.54      18.0 +/-    0.54  0.200 / 0.240
G22     203.0          61.7               12.3 +/-    0.35      13.8 +/-    0.35  0.040 / 0.070
G23     314.3          44.0               11.0 +/-    0.78      15.0 +/-    0.78  0.060 / 0.080
G26     79.9           53.8               10.4 +/-    0.86      12.5 +/-    0.86  0.040 / 0.030
G31     49.4           24.7                9.4 +/-    2.16      18.4 +/-    2.16  0.030 / 0.030