PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-23:57:40
G01     117.3          19.3               12.1 +/-    2.09      27.1 +/-    2.09  0.050 / 0.160
G07     85.1           65.7               10.2 +/-    0.27      11.1 +/-    0.27  0.080 / 0.120
G08     44.9           31.9                8.5 +/-    0.93      14.2 +/-    0.93  0.040 / 0.070
G09     177.5          24.9               11.0 +/-    1.77      21.5 +/-    1.77  0.040 / 0.100
G11     107.9          40.6               11.9 +/-    0.76      17.1 +/-    0.76  0.040 / 0.060
G13     317.1          20.3                6.8 +/-    3.06      14.8 +/-    3.06  0.040 / 0.060
G17     202.8          25.2               12.2 +/-    1.36      23.7 +/-    1.36  0.140 / 0.230
G28     297.7          58.5                8.7 +/-    0.70      10.0 +/-    0.70  0.120 / 0.180
G30     3.2            72.8               10.8 +/-    1.17      11.2 +/-    1.17  0.140 / 0.480