PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-21:43:10
G02     200.5          24.4               14.2 +/-    3.41      28.1 +/-    3.41  0.050 / 0.070
G06     172.1          55.3               13.1 +/-    0.59      15.6 +/-    0.59  0.050 / 0.060
G13     224.0          11.2               13.1 +/-    2.16      35.7 +/-    2.16  0.100 / 0.140
G17     26.0           56.9               10.6 +/-    0.66      12.4 +/-    0.66  0.100 / 0.140
G19     334.1          70.4                9.8 +/-    0.76      10.3 +/-    0.76  0.400 / 0.620
G24     306.9          32.6                9.3 +/-    1.68      15.4 +/-    1.68  0.320 / 0.560
G28     88.4           41.5               11.1 +/-    1.42      15.7 +/-    1.42  0.150 / 0.430
G30     156.8          10.0               13.7 +/-    3.13      38.2 +/-    3.13  0.210 / 0.450