PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-01:42:40
G02     350.3          78.1                9.8 +/-    0.76      10.0 +/-    0.76  0.030 / 0.040
G05     162.9          34.6               15.9 +/-    1.11      25.3 +/-    1.11  0.030 / 0.040
G06     41.7           40.0                9.0 +/-    0.67      13.1 +/-    0.67  0.040 / 0.080
G12     311.3          71.1               11.9 +/-    0.53      12.5 +/-    0.53  0.070 / 0.080
G17     84.6           15.0               11.6 +/-    1.52      28.9 +/-    1.52  0.090 / 0.180
G19     74.7           28.0               11.3 +/-    0.89      20.7 +/-    0.89  0.090 / 0.160
G24     228.4          22.6               17.4 +/-    3.41      35.9 +/-    3.41  0.160 / 0.270
G25     317.4          28.1                7.6 +/-    1.25      13.9 +/-    1.25  0.150 / 0.220