PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-14:57:50
G03     190.0          19.9               13.0 +/-    2.15      28.7 +/-    2.15  0.030 / 0.040
G07     290.4          37.3               10.7 +/-    1.58      16.3 +/-    1.58  0.030 / 0.040
G08     143.6          27.6               15.6 +/-    0.69      28.7 +/-    0.69  0.060 / 0.100
G09     320.4          63.3                9.9 +/-    0.75      11.0 +/-    0.75  0.060 / 0.130
G16     42.5           36.7                9.0 +/-    1.36      13.8 +/-    1.36  0.050 / 0.080
G23     121.2          74.4               12.7 +/-    0.75      13.1 +/-    0.75  0.060 / 0.100
G27     98.6           34.0               13.7 +/-    1.09      22.2 +/-    1.09  0.110 / 0.240
G30     274.3          13.5               12.2 +/-    1.66      31.6 +/-    1.66  0.130 / 0.270