PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-16:12:30
G02     221.2          62.0                9.7 +/-    1.68      10.8 +/-    1.68  0.080 / 0.080
G06     47.8           67.4                9.5 +/-    0.52      10.2 +/-    0.52  0.110 / 0.100
G12     321.6          45.6                9.1 +/-    1.59      12.1 +/-    1.59  0.050 / 0.070
G17     62.4           27.8                8.2 +/-    2.18      15.0 +/-    2.18  0.050 / 0.050
G19     41.1           48.9                9.8 +/-    0.80      12.5 +/-    0.80  0.030 / 0.030
G24     256.4          40.3                8.7 +/-    4.11      12.6 +/-    4.11  0.040 / 0.030
G28     125.7          10.2               10.7 +/-    2.98      29.7 +/-    2.98  0.050 / 0.050