PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-13:42:30
G03     205.5          51.5               10.3 +/-    0.68      12.8 +/-    0.68  0.070 / 0.280
G07     261.6          18.5                8.3 +/-    1.56      18.8 +/-    1.56  0.100 / 0.250
G09     313.2          33.1                7.9 +/-    1.64      13.0 +/-    1.64  0.050 / 0.060
G16     76.5           62.5                8.9 +/-    0.52       9.9 +/-    0.52  0.040 / 0.050
G22     183.4          32.7               10.7 +/-    1.73      17.7 +/-    1.73  0.050 / 0.070
G23     343.6          68.7                8.0 +/-    0.68       8.5 +/-    0.68  0.040 / 0.070
G26     48.4           36.6                7.1 +/-    0.59      10.9 +/-    0.59  0.060 / 0.100
G27     129.4          14.8               11.3 +/-    1.66      28.4 +/-    1.66  0.070 / 0.110