PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/20-03:43:10
G01     69.6           31.7                3.6 +/-    1.14       6.1 +/-    1.14  0.030 / 0.030
G07     136.2          32.8                8.1 +/-    1.10      13.5 +/-    1.10  0.030 / 0.030
G11     56.7           36.1                5.7 +/-    1.42       8.9 +/-    1.42  0.150 / 0.270
G13     274.5          39.0                5.8 +/-    1.76       8.6 +/-    1.76  0.120 / 0.270
G15     300.6          16.6                2.8 +/-    1.28       6.8 +/-    1.28  0.040 / 0.050
G17     229.2          69.1                7.0 +/-    0.85       7.5 +/-    0.85  0.040 / 0.050
G19     222.0          43.3                7.2 +/-    1.83       9.9 +/-    1.83  0.070 / 0.090
G28     358.2          61.5                6.2 +/-    0.42       6.9 +/-    0.42  0.070 / 0.100
G30     134.5          67.9                7.4 +/-    0.38       7.9 +/-    0.38  0.030 / 0.030