PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-16:42:40
G03     187.4          14.9               13.2 +/-    1.99      32.9 +/-    1.99  0.060 / 0.140
G07     295.3          40.0               11.2 +/-    0.78      16.3 +/-    0.78  0.060 / 0.140
G08     141.3          31.2               13.3 +/-    1.78      22.7 +/-    1.78  0.030 / 0.040
G09     318.5          67.8                9.3 +/-    1.82      10.0 +/-    1.82  0.040 / 0.050
G16     41.8           32.5                8.5 +/-    0.80      14.1 +/-    0.80  0.040 / 0.070
G23     131.2          69.2               11.2 +/-    1.11      11.9 +/-    1.11  0.040 / 0.080
G27     92.3           35.6               12.0 +/-    0.48      18.8 +/-    0.48  0.060 / 0.140
G30     278.4          17.0               12.2 +/-    3.07      28.8 +/-    3.07  0.050 / 0.130