PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-13:58:00
G02     202.9          31.8                7.7 +/-    1.51      13.0 +/-    1.51  0.080 / 0.110
G06     164.8          66.4                8.1 +/-    1.21       8.8 +/-    1.21  0.050 / 0.100
G12     306.7          13.6                4.7 +/-    2.20      12.1 +/-    2.20  0.150 / 0.200
G17     36.9           48.5                4.6 +/-    0.43       5.9 +/-    0.43  0.090 / 0.210
G19     2.5            65.4                5.0 +/-    0.34       5.4 +/-    0.34  0.020 / 0.040
G24     301.6          36.0                6.1 +/-    1.18       9.6 +/-    1.18  0.030 / 0.040
G28     101.3          31.9                6.7 +/-    0.65      11.2 +/-    0.65  0.030 / 0.050