PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/11-01:12:30
G02     215.0          61.1               14.7 +/-    0.79      16.6 +/-    0.79  0.080 / 0.090
G06     60.0           75.3               12.0 +/-    0.48      12.3 +/-    0.48  0.080 / 0.090
G12     318.3          35.0               11.5 +/-    1.22      18.3 +/-    1.22  0.030 / 0.020
G17     54.2           36.4               12.9 +/-    1.22      19.9 +/-    1.22  0.030 / 0.020
G19     37.9           50.1               12.2 +/-    1.76      15.4 +/-    1.76  0.050 / 0.070
G24     266.6          41.7               15.1 +/-    1.56      21.4 +/-    1.56  0.050 / 0.080
G28     122.4          13.7               16.4 +/-    1.63      42.1 +/-    1.63  0.170 / 0.280