PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/15-13:43:10
G01     315.6          24.5                6.0 +/-    1.90      11.9 +/-    1.90  0.040 / 0.060
G10     91.5           48.6                5.8 +/-    1.30       7.4 +/-    1.30  0.050 / 0.050
G11     297.8          24.6                6.8 +/-    2.14      13.4 +/-    2.14  0.030 / 0.050
G14     316.1          70.3                6.2 +/-    0.53       6.5 +/-    0.53  0.030 / 0.040
G22     305.3          19.0                5.7 +/-    1.29      12.8 +/-    1.29  0.130 / 0.220
G25     94.7           12.2                9.1 +/-    1.10      24.2 +/-    1.10  0.120 / 0.170
G31     172.2          52.5               10.4 +/-    0.33      12.7 +/-    0.33  0.100 / 0.140
G32     23.0           60.5                6.0 +/-    0.71       6.8 +/-    0.71  0.100 / 0.140