PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-06:28:00
G01     117.2          17.5                4.9 +/-    0.91      11.5 +/-    0.91  0.030 / 0.030
G07     82.0           65.8                5.0 +/-    0.43       5.4 +/-    0.43  0.030 / 0.030
G08     45.3           32.5                1.8 +/-    1.43       3.0 +/-    1.43  0.040 / 0.080
G09     175.3          24.7                4.7 +/-    1.12       9.2 +/-    1.12  0.050 / 0.070
G11     109.8          41.3                5.5 +/-    0.80       7.8 +/-    0.80  0.100 / 0.120
G13     317.2          20.7                2.6 +/-    2.91       5.7 +/-    2.91  0.100 / 0.140
G17     201.1          23.4                4.7 +/-    3.24       9.5 +/-    3.24  0.030 / 0.040
G28     281.8          51.9                6.3 +/-    2.12       7.7 +/-    2.12  0.030 / 0.040
G30     340.5          66.7                4.1 +/-    0.71       4.5 +/-    0.71  0.060 / 0.080