PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-01:27:30
G02     301.4          82.0                9.6 +/-    0.81       9.7 +/-    0.81  0.170 / 0.170
G05     166.6          26.3               14.0 +/-    2.22      26.6 +/-    2.22  0.040 / 0.040
G06     40.1           48.2                9.5 +/-    1.12      12.3 +/-    1.12  0.040 / 0.030
G12     319.4          62.2                9.2 +/-    1.03      10.3 +/-    1.03  0.040 / 0.030
G17     77.4           20.1                8.1 +/-    1.65      17.7 +/-    1.65  0.130 / 0.110
G19     66.6           33.2                9.4 +/-    1.06      15.5 +/-    1.06  0.090 / 0.120
G24     235.5          28.5               13.0 +/-    1.14      23.4 +/-    1.14  0.240 / 0.370
G25     317.8          20.3                7.8 +/-    1.73      17.0 +/-    1.73  0.290 / 0.300