PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-21:57:40
G01     38.0           11.1               10.5 +/-    2.32      28.7 +/-    2.32  0.170 / 0.210
G02     199.3          14.3               21.3 +/-    4.71      53.9 +/-    4.71  0.120 / 0.200
G06     175.6          43.5               16.6 +/-    1.73      22.8 +/-    1.73  0.150 / 0.240
G13     231.6          18.1               16.9 +/-    1.90      38.9 +/-    1.90  0.180 / 0.220
G17     14.2           64.9               10.8 +/-    0.98      11.8 +/-    0.98  0.220 / 0.240
G19     298.0          71.4               11.0 +/-    0.49      11.5 +/-    0.49  0.110 / 0.260
G24     313.3          25.3               10.0 +/-    1.84      19.4 +/-    1.84  0.040 / 0.030
G28     75.7           47.0               11.7 +/-    1.04      15.4 +/-    1.04  0.030 / 0.030
G30     155.6          19.9               17.5 +/-    1.29      38.5 +/-    1.29  0.130 / 0.220