PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-01:43:10
G02     262.6          80.5                9.9 +/-    0.68      10.1 +/-    0.68  0.060 / 0.020
G05     168.9          21.0               13.8 +/-    2.31      29.6 +/-    2.31  0.050 / 0.020
G06     39.9           54.1                9.1 +/-    0.90      10.9 +/-    0.90  0.110 / 0.100
G12     321.1          56.1               10.3 +/-    0.80      12.1 +/-    0.80  0.100 / 0.080
G17     72.6           23.5                9.7 +/-    2.18      19.6 +/-    2.18  0.140 / 0.150
G19     61.1           36.5               10.0 +/-    1.06      15.4 +/-    1.06  0.110 / 0.210
G24     240.9          32.2               11.6 +/-    0.95      19.4 +/-    0.95  0.100 / 0.050
G25     317.4          15.3                6.4 +/-    2.09      15.8 +/-    2.09  0.130 / 0.050