PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-16:58:00
G07     347.9          62.8               13.0 +/-    0.69      14.4 +/-    0.69  0.040 / 0.040
G08     85.8           53.7               13.1 +/-    1.03      15.8 +/-    1.03  0.040 / 0.040
G09     183.5          63.2               13.6 +/-    0.89      15.1 +/-    0.89  0.060 / 0.060
G11     140.3          19.1               14.5 +/-    2.98      32.6 +/-    2.98  0.070 / 0.060
G23     156.6          27.2               13.5 +/-    1.82      25.2 +/-    1.82  0.030 / 0.040
G27     46.9           25.7               11.0 +/-    2.02      21.2 +/-    2.02  0.040 / 0.040
G28     246.0          37.2               15.3 +/-    1.56      23.3 +/-    1.56  0.110 / 0.120
G30     310.5          42.5               11.9 +/-    1.45      16.7 +/-    1.45  0.050 / 0.090