PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-14:42:30
G01     320.5          13.1                2.1 +/-    5.09       5.6 +/-    5.09  0.250 / 0.310
G08     265.3          15.7                6.7 +/-    4.11      16.4 +/-    4.11  0.220 / 0.320
G10     69.9           56.5                4.0 +/-    0.44       4.7 +/-    0.44  0.040 / 0.050
G11     309.9          18.0                5.6 +/-    2.47      13.0 +/-    2.47  0.030 / 0.040
G14     276.8          67.5                4.3 +/-    0.72       4.7 +/-    0.72  0.090 / 0.070
G27     227.2          12.1                5.3 +/-    3.23      14.1 +/-    3.23  0.050 / 0.100
G31     176.7          36.5                6.5 +/-    1.81      10.0 +/-    1.81  0.170 / 0.260
G32     356.8          70.9                3.6 +/-    0.46       3.8 +/-    0.46  0.150 / 0.240