PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-17:27:40
G07     40.6           69.8               13.4 +/-    0.78      14.1 +/-    0.78  0.040 / 0.050
G08     54.8           44.3               12.9 +/-    0.84      17.5 +/-    0.84  0.050 / 0.050
G09     178.7          39.9               14.7 +/-    1.75      21.4 +/-    1.75  0.030 / 0.030
G11     123.0          33.0               13.6 +/-    1.50      22.4 +/-    1.50  0.030 / 0.040
G18     107.4          14.9               14.6 +/-    0.90      36.4 +/-    0.90  0.030 / 0.040
G27     37.6           9.7                10.6 +/-    2.73      29.7 +/-    2.73  0.030 / 0.040
G28     271.3          51.2               15.4 +/-    3.13      19.2 +/-    3.13  0.150 / 0.300
G30     330.2          58.4               12.6 +/-    0.71      14.5 +/-    0.71  0.170 / 0.370