PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-21:12:40
G03     188.4          17.8               12.7 +/-    2.14      29.6 +/-    2.14  0.080 / 0.070
G07     291.8          38.1               11.3 +/-    2.70      17.0 +/-    2.70  0.060 / 0.070
G08     142.5          28.7               15.6 +/-    2.81      28.1 +/-    2.81  0.070 / 0.130
G09     319.8          63.4               12.2 +/-    0.65      13.5 +/-    0.65  0.070 / 0.110
G16     42.4           38.0               10.9 +/-    0.93      16.4 +/-    0.93  0.050 / 0.080
G23     121.7          76.5               12.2 +/-    0.63      12.5 +/-    0.63  0.060 / 0.080
G26     43.7           9.8                 9.8 +/-    3.65      27.6 +/-    3.65  0.030 / 0.020
G27     96.3           34.4               12.4 +/-    0.86      19.9 +/-    0.86  0.030 / 0.020
G30     276.5          17.1               11.5 +/-    1.23      27.0 +/-    1.23  0.060 / 0.130