PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-04:42:40
G01     46.7           22.4                2.7 +/-    2.86       5.5 +/-    2.86  0.040 / 0.070
G06     176.5          26.6                4.8 +/-    3.05       9.1 +/-    3.05  0.040 / 0.050
G07     146.5          11.2                6.2 +/-    3.03      16.9 +/-    3.03  0.230 / 0.250
G11     45.1           17.8                3.5 +/-    2.91       8.2 +/-    2.91  0.180 / 0.370
G13     246.7          30.2                5.7 +/-    1.04       9.9 +/-    1.04  0.170 / 0.350
G15     278.3          15.9                3.7 +/-    2.15       9.0 +/-    2.15  0.340 / 0.350
G17     329.5          78.4                6.1 +/-    0.38       6.2 +/-    0.38  0.110 / 0.070
G19     250.4          64.0                6.8 +/-    0.39       7.5 +/-    0.39  0.080 / 0.050
G28     42.2           57.6                5.4 +/-    1.34       6.2 +/-    1.34  0.040 / 0.040
G30     152.0          43.7                7.5 +/-    0.91      10.3 +/-    0.91  0.040 / 0.040