PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/27-17:57:40
G02     218.7          60.6               15.5 +/-    0.85      17.5 +/-    0.85  0.030 / 0.070
G06     51.2           70.2               14.5 +/-    0.71      15.3 +/-    0.71  0.040 / 0.070
G12     320.5          42.0               13.5 +/-    1.73      19.0 +/-    1.73  0.040 / 0.060
G17     59.7           30.4               12.4 +/-    0.98      21.5 +/-    0.98  0.050 / 0.050
G19     38.8           50.0               12.7 +/-    0.82      16.0 +/-    0.82  0.100 / 0.500
G24     260.2          41.2               16.6 +/-    1.20      23.7 +/-    1.20  0.080 / 0.600
G28     124.2          11.9               12.8 +/-    2.86      34.3 +/-    2.86  0.070 / 0.100