PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-19:42:50
G02     213.4          55.4               15.2 +/-    0.72      18.0 +/-    0.72  0.090 / 0.110
G06     66.5           75.9               12.6 +/-    0.39      12.9 +/-    0.39  0.060 / 0.100
G12     318.0          35.0               11.3 +/-    1.39      17.9 +/-    1.39  0.050 / 0.070
G17     53.7           35.6               11.7 +/-    1.02      18.4 +/-    1.02  0.050 / 0.070
G19     31.7           53.5               13.1 +/-    0.45      15.9 +/-    0.45  0.030 / 0.060
G24     269.3          42.5               13.4 +/-    2.19      18.7 +/-    2.19  0.050 / 0.060
G28     120.1          16.4               13.3 +/-    1.50      31.8 +/-    1.50  0.040 / 0.050