PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-05:27:50
G02     198.6          18.1                5.3 +/-    1.32      12.2 +/-    1.32  0.090 / 0.160
G06     171.6          48.3                6.7 +/-    0.73       8.6 +/-    0.73  0.090 / 0.150
G13     229.1          16.8                4.9 +/-    3.02      11.6 +/-    3.02  0.180 / 0.390
G17     17.7           63.0                4.9 +/-    0.40       5.5 +/-    0.40  0.290 / 0.420
G19     312.6          72.5                4.5 +/-    0.62       4.6 +/-    0.62  0.040 / 0.050
G24     313.2          24.8                2.7 +/-    2.11       5.2 +/-    2.11  0.040 / 0.060
G28     74.1           49.6                4.2 +/-    0.51       5.3 +/-    0.51  0.040 / 0.030
G30     157.9          22.9                7.6 +/-    2.40      15.5 +/-    2.40  0.050 / 0.030