PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-14:27:40
G03     206.3          53.1               11.1 +/-    0.66      13.6 +/-    0.66  0.080 / 0.130
G07     260.1          17.3               10.1 +/-    1.49      23.8 +/-    1.49  0.110 / 0.150
G09     312.3          31.3                8.2 +/-    1.08      14.0 +/-    1.08  0.030 / 0.050
G16     81.3           63.3                9.1 +/-    0.40      10.1 +/-    0.40  0.030 / 0.040
G22     183.2          34.0                9.4 +/-    1.26      15.3 +/-    1.26  0.030 / 0.030
G23     342.4          67.6                9.1 +/-    0.49       9.8 +/-    0.49  0.040 / 0.030
G26     49.5           38.3                8.5 +/-    1.43      12.8 +/-    1.43  0.040 / 0.040
G27     130.7          13.6               11.7 +/-    1.86      30.2 +/-    1.86  0.050 / 0.050