PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-17:27:50
G07     29.3           69.4               14.7 +/-    0.49      15.5 +/-    0.49  0.040 / 0.060
G08     58.8           47.0               13.9 +/-    0.91      18.3 +/-    0.91  0.040 / 0.060
G09     179.2          43.9               15.8 +/-    0.74      21.7 +/-    0.74  0.040 / 0.040
G11     126.6          30.7               14.9 +/-    2.43      25.8 +/-    2.43  0.040 / 0.040
G18     110.6          12.9               13.0 +/-    2.03      34.1 +/-    2.03  0.030 / 0.030
G23     158.9          10.4               12.2 +/-    5.04      33.6 +/-    5.04  0.030 / 0.030
G27     38.5           12.7               10.1 +/-    2.24      26.5 +/-    2.24  0.110 / 0.300
G28     266.1          49.0               15.0 +/-    4.55      19.2 +/-    4.55  0.150 / 0.360
G30     326.3          55.5               13.5 +/-    0.70      16.0 +/-    0.70  0.110 / 0.120