PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-04:12:30
G10     250.7          26.7               11.0 +/-    2.33      20.7 +/-    2.33  0.090 / 0.240
G13     53.5           30.0                6.9 +/-    1.91      12.0 +/-    1.91  0.110 / 0.270
G15     86.4           57.6                8.2 +/-    0.93       9.5 +/-    0.93  0.040 / 0.050
G16     294.6          15.6                7.9 +/-    1.44      19.3 +/-    1.44  0.040 / 0.050
G20     287.0          63.8                8.6 +/-    0.80       9.4 +/-    0.80  0.080 / 0.130
G21     333.2          59.9                6.9 +/-    0.72       7.9 +/-    0.72  0.080 / 0.120
G26     266.2          15.6               10.9 +/-    2.19      26.7 +/-    2.19  0.030 / 0.040
G29     165.3          50.4                8.2 +/-    0.66      10.3 +/-    0.66  0.040 / 0.040