PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-14:42:50
G01     317.0          22.2                2.1 +/-    1.90       4.3 +/-    1.90  0.140 / 0.340
G08     255.7          10.5                5.6 +/-    2.00      15.6 +/-    2.00  0.140 / 0.270
G10     87.4           50.5                8.6 +/-    0.49      10.8 +/-    0.49  0.140 / 0.400
G11     300.9          23.3                4.9 +/-    1.38       9.9 +/-    1.38  0.140 / 0.380
G14     308.6          70.4                7.3 +/-    0.65       7.7 +/-    0.65  0.030 / 0.050
G22     303.8          16.1                3.7 +/-    1.98       9.1 +/-    1.98  0.030 / 0.050
G25     97.3           10.8                5.9 +/-   31.24      16.2 +/-   31.24  0.050 / 0.060
G31     173.7          48.8               10.9 +/-    1.51      14.0 +/-    1.51  0.070 / 0.050
G32     18.4           62.9                6.3 +/-    0.78       7.0 +/-    0.78  0.100 / 0.390