PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-15:42:30
G03     204.6          52.0               11.6 +/-    0.56      14.3 +/-    0.56  0.040 / 0.040
G07     260.6          17.7               11.4 +/-    1.02      26.5 +/-    1.02  0.030 / 0.030
G09     312.4          31.4                8.6 +/-    1.08      14.7 +/-    1.08  0.060 / 0.110
G16     80.5           63.4               10.4 +/-    0.47      11.5 +/-    0.47  0.080 / 0.110
G22     182.9          33.3                9.6 +/-    0.99      15.7 +/-    0.99  0.030 / 0.040
G23     342.1          67.7                9.8 +/-    0.56      10.5 +/-    0.56  0.030 / 0.060
G26     49.2           38.0               10.0 +/-    1.03      15.0 +/-    1.03  0.040 / 0.040
G27     130.1          14.0               11.1 +/-    1.97      28.3 +/-    1.97  0.040 / 0.040