PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/18-22:28:00
G01     77.7           33.0                8.1 +/-    1.24      13.3 +/-    1.24  0.050 / 0.100
G07     133.5          31.6                9.8 +/-    1.26      16.6 +/-    1.26  0.070 / 0.090
G11     57.0           33.8                8.0 +/-    2.49      13.0 +/-    2.49  0.060 / 0.120
G13     281.6          38.5                6.4 +/-    2.32       9.5 +/-    2.32  0.070 / 0.100
G15     307.2          14.0                6.1 +/-    1.89      15.4 +/-    1.89  0.040 / 0.050
G17     223.3          65.3                9.2 +/-    0.78      10.0 +/-    0.78  0.040 / 0.050
G18     51.6           19.1                8.0 +/-    1.58      18.0 +/-    1.58  0.030 / 0.020
G19     219.4          36.2               11.5 +/-    1.60      17.9 +/-    1.60  0.030 / 0.020
G28     0.6            61.3                7.9 +/-    0.96       8.8 +/-    0.96  0.120 / 0.090
G30     128.1          67.1               10.5 +/-    0.46      11.3 +/-    0.46  0.070 / 0.140