PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/07-21:58:10
G01     51.1           26.1               10.8 +/-    2.73      20.6 +/-    2.73  0.100 / 0.140
G06     180.0          20.4               14.9 +/-    2.80      32.4 +/-    2.80  0.080 / 0.150
G11     44.5           15.6                9.4 +/-    3.42      23.2 +/-    3.42  0.040 / 0.060
G13     251.4          31.9               11.4 +/-    1.45      19.2 +/-    1.45  0.040 / 0.050
G15     284.5          16.1               10.8 +/-    1.11      26.2 +/-    1.11  0.050 / 0.050
G17     310.8          79.4               12.8 +/-    0.56      13.0 +/-    0.56  0.040 / 0.040
G19     243.2          58.6               13.5 +/-    1.51      15.6 +/-    1.51  0.050 / 0.060
G28     43.8           56.0               11.4 +/-    1.20      13.5 +/-    1.20  0.060 / 0.060
G30     148.7          42.0               14.1 +/-    0.81      19.9 +/-    0.81  0.090 / 0.110