PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-17:28:00
G07     18.8           68.6               12.8 +/-    0.73      13.6 +/-    0.73  0.050 / 0.060
G08     63.5           49.3               12.9 +/-    0.64      16.4 +/-    0.64  0.060 / 0.050
G09     179.8          48.0               14.8 +/-    0.80      19.2 +/-    0.80  0.030 / 0.040
G11     129.9          28.3               13.8 +/-    1.15      25.1 +/-    1.15  0.040 / 0.040
G18     113.7          11.0               16.3 +/-    2.94      44.5 +/-    2.94  0.030 / 0.030
G23     158.6          13.8               14.7 +/-    2.23      37.6 +/-    2.23  0.030 / 0.030
G27     39.7           15.6                9.0 +/-    2.10      22.2 +/-    2.10  0.230 / 0.360
G28     261.2          46.7               14.4 +/-    4.16      18.9 +/-    4.16  0.170 / 0.290
G30     322.7          52.6               12.6 +/-    0.39      15.4 +/-    0.39  0.150 / 0.110