PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-14:42:30
G01     319.6          16.2                4.9 +/-    1.95      11.8 +/-    1.95  0.030 / 0.070
G08     262.0          14.1                5.4 +/-    1.42      13.8 +/-    1.42  0.040 / 0.070
G10     76.2           54.7                7.0 +/-    0.47       8.3 +/-    0.47  0.110 / 0.430
G11     307.2          20.0                7.3 +/-    1.20      16.1 +/-    1.20  0.110 / 0.310
G14     286.6          68.9                7.0 +/-    0.72       7.4 +/-    0.72  0.040 / 0.050
G22     300.0          10.6               -1.0 +/-    4.88      -2.9 +/-    4.88  0.030 / 0.060
G31     175.9          40.5               10.2 +/-    1.09      14.7 +/-    1.09  0.160 / 0.300
G32     5.3            68.4                8.1 +/-    0.32       8.6 +/-    0.32  0.170 / 0.230