PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-20:27:50
G01     254.9          37.4                8.9 +/-    1.50      13.5 +/-    1.50  0.060 / 0.100
G03     316.5          40.4                8.1 +/-    1.01      11.7 +/-    1.01  0.050 / 0.090
G11     238.6          13.5               11.5 +/-    1.79      29.5 +/-    1.79  0.060 / 0.100
G14     57.1           42.3                7.3 +/-    0.56      10.2 +/-    0.56  0.060 / 0.090
G18     219.7          29.0                8.1 +/-    1.67      14.4 +/-    1.67  0.250 / 0.440
G22     308.3          62.7                7.4 +/-    1.40       8.2 +/-    1.40  0.220 / 0.530
G23     283.3          15.6                9.5 +/-    2.50      23.3 +/-    2.50  0.070 / 0.090
G26     142.3          34.1               11.6 +/-    0.66      18.7 +/-    0.66  0.060 / 0.100
G31     42.1           66.6                7.8 +/-    0.35       8.4 +/-    0.35  0.040 / 0.050
G32     73.7           25.9                7.3 +/-    0.80      14.0 +/-    0.80  0.040 / 0.060