PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-01:58:10
G02     37.5           51.7                7.0 +/-    0.37       8.6 +/-    0.37  0.030 / 0.040
G05     127.9          65.3               10.5 +/-    0.92      11.4 +/-    0.92  0.030 / 0.040
G06     56.0           12.7                4.4 +/-    1.00      11.6 +/-    1.00  0.050 / 0.050
G12     194.9          63.6               11.1 +/-    1.06      12.2 +/-    1.06  0.030 / 0.040
G25     292.0          54.9                9.4 +/-    0.77      11.2 +/-    0.77  0.030 / 0.060
G29     309.6          30.1                8.9 +/-    0.75      15.5 +/-    0.75  0.040 / 0.050