PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-05:57:50
G07     44.0           69.5                3.9 +/-    0.32       4.2 +/-    0.32  0.040 / 0.050
G08     54.4           43.3                3.2 +/-    0.32       4.5 +/-    0.32  0.040 / 0.050
G09     176.6          38.6                6.7 +/-    0.83      10.0 +/-    0.83  0.030 / 0.040
G11     124.9          33.8                6.6 +/-    0.66      10.6 +/-    0.66  0.020 / 0.040
G17     199.2          10.2               -8.1 +/-   12.60     -22.4 +/-   12.60  0.060 / 0.120
G23     160.4          11.0                2.1 +/-    3.41       5.6 +/-    3.41  0.070 / 0.110
G27     37.7           10.5                2.9 +/-    2.57       7.9 +/-    2.57  0.250 / 0.410
G28     263.4          44.2                3.9 +/-    1.71       5.3 +/-    1.71  0.180 / 0.370
G30     325.3          55.3                3.4 +/-    0.91       4.1 +/-    0.91  0.050 / 0.100