PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/28-10:42:40
G07     351.9          63.7                4.2 +/-    0.41       4.6 +/-    0.41  0.130 / 0.160
G08     91.9           53.8                5.7 +/-    1.04       6.9 +/-    1.04  0.140 / 0.190
G09     185.0          66.6                4.6 +/-    0.58       4.9 +/-    0.58  0.040 / 0.040
G11     141.2          18.6                3.4 +/-    1.92       7.8 +/-    1.92  0.030 / 0.040
G23     156.2          30.5                4.4 +/-    0.98       7.6 +/-    0.98  0.120 / 0.150
G27     49.5           28.0                2.2 +/-    1.99       4.0 +/-    1.99  0.080 / 0.170
G28     241.0          29.3                4.8 +/-    1.96       8.6 +/-    1.96  0.030 / 0.030
G30     308.2          40.8                3.9 +/-    1.42       5.6 +/-    1.42  0.030 / 0.040