PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-22:28:10
G02     218.7          63.6               12.5 +/-    1.10      13.8 +/-    1.10  0.080 / 0.060
G06     51.0           70.9               10.8 +/-    0.49      11.4 +/-    0.49  0.050 / 0.060
G12     319.7          39.6                8.3 +/-    1.18      12.1 +/-    1.18  0.060 / 0.070
G17     58.2           32.9                9.2 +/-    2.43      15.2 +/-    2.43  0.080 / 0.090
G19     41.1           48.5                9.6 +/-    1.50      12.3 +/-    1.50  0.040 / 0.020
G24     261.0          40.8               13.1 +/-    3.99      18.7 +/-    3.99  0.030 / 0.030
G28     124.7          11.2               13.2 +/-    1.46      35.9 +/-    1.46  0.210 / 0.400