PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/27-21:58:00
G01     105.7          26.3               13.4 +/-    1.08      25.3 +/-    1.08  0.100 / 0.160
G07     108.7          57.6               13.3 +/-    0.40      15.4 +/-    0.40  0.100 / 0.160
G08     42.3           22.9                8.0 +/-    0.64      16.4 +/-    0.64  0.080 / 0.280
G09     175.2          13.1               20.1 +/-    1.23      52.3 +/-    1.23  0.080 / 0.290
G11     90.1           43.5               12.0 +/-    0.59      16.6 +/-    0.59  0.050 / 0.060
G13     308.8          29.1                9.4 +/-    0.45      16.8 +/-    0.45  0.040 / 0.060
G17     207.5          35.9               14.6 +/-    1.10      22.8 +/-    1.10  0.040 / 0.080
G18     79.4           24.6               12.0 +/-    1.64      23.7 +/-    1.64  0.030 / 0.070
G28     321.9          61.3               10.5 +/-    0.66      11.8 +/-    0.66  0.060 / 0.090
G30     45.5           78.5               11.5 +/-    0.65      11.7 +/-    0.65  0.060 / 0.090