PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-09:27:50
G01     91.2           30.5                5.2 +/-    1.41       8.9 +/-    1.41  0.040 / 0.050
G07     123.3          45.8                6.2 +/-    0.71       8.3 +/-    0.71  0.040 / 0.050
G08     42.1           11.7                3.0 +/-    3.37       8.1 +/-    3.37  0.030 / 0.050
G11     72.4           42.5                5.0 +/-    0.88       7.0 +/-    0.88  0.040 / 0.050
G13     296.3          36.5                4.4 +/-    3.10       6.8 +/-    3.10  0.130 / 0.160
G17     212.0          48.9                6.9 +/-    0.80       8.8 +/-    0.80  0.120 / 0.200
G18     65.4           24.1                4.9 +/-    1.51       9.8 +/-    1.51  0.510 / 0.190
G19     212.4          26.8                5.3 +/-    1.60      10.0 +/-    1.60  0.300 / 0.220
G28     328.7          60.8                4.6 +/-    0.66       5.1 +/-    0.66  0.030 / 0.020
G30     90.2           79.3                5.0 +/-    0.43       5.1 +/-    0.43  0.030 / 0.030