PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/06-18:12:50
G07     40.4           69.8               10.4 +/-    0.49      11.0 +/-    0.49  0.040 / 0.060
G08     55.2           44.9               11.2 +/-    0.95      15.2 +/-    0.95  0.210 / 0.170
G09     178.9          40.1               13.5 +/-    1.24      19.6 +/-    1.24  0.030 / 0.030
G11     123.3          32.9               14.2 +/-    1.17      23.4 +/-    1.17  0.030 / 0.040
G18     107.4          14.8               14.0 +/-    1.55      34.9 +/-    1.55  0.030 / 0.040
G27     37.6           9.6                 7.8 +/-    3.42      21.8 +/-    3.42  0.030 / 0.040
G28     271.4          51.2               12.1 +/-    3.29      15.0 +/-    3.29  0.130 / 0.080
G30     330.6          58.7                8.9 +/-    0.87      10.2 +/-    0.87  0.070 / 0.090