PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/22-16:58:00
G02     89.6           10.2               11.7 +/-    1.47      32.6 +/-    1.47  0.170 / 0.320
G05     45.6           28.6                8.1 +/-    2.24      14.7 +/-    2.24  0.130 / 0.280
G13     87.6           35.5               12.5 +/-    0.92      19.7 +/-    0.92  0.080 / 0.090
G15     141.4          44.3               13.9 +/-    0.93      18.9 +/-    0.93  0.060 / 0.200
G20     240.3          29.6               12.5 +/-    1.60      22.1 +/-    1.60  0.050 / 0.080
G25     201.2          16.8               10.8 +/-    2.82      25.8 +/-    2.82  0.050 / 0.110
G26     297.7          19.8                8.8 +/-    1.06      19.4 +/-    1.06  0.030 / 0.050
G29     137.4          82.9               12.1 +/-    0.30      12.2 +/-    0.30  0.030 / 0.050