PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-16:42:50
G07     356.5          65.0               14.3 +/-    0.58      15.6 +/-    0.58  0.040 / 0.040
G08     77.6           52.9               15.4 +/-    0.49      18.8 +/-    0.49  0.040 / 0.040
G09     181.7          58.2               16.5 +/-    1.07      19.0 +/-    1.07  0.040 / 0.060
G11     137.0          22.1               15.6 +/-    0.90      32.7 +/-    0.90  0.030 / 0.060
G23     157.6          23.2               14.5 +/-    1.15      29.6 +/-    1.15  0.060 / 0.090
G27     44.2           22.7               11.2 +/-    2.45      23.2 +/-    2.45  0.060 / 0.120
G28     250.4          40.4               16.8 +/-    0.84      24.3 +/-    0.84  0.070 / 0.220
G30     314.1          45.5               13.6 +/-    0.64      18.2 +/-    0.64  0.090 / 0.200