PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/11-20:27:50
G07     11.1           66.7               11.5 +/-    0.75      12.4 +/-    0.75  0.040 / 0.040
G08     71.5           50.0               11.1 +/-    0.89      13.9 +/-    0.89  0.040 / 0.040
G09     181.9          58.4               13.2 +/-    0.78      15.2 +/-    0.78  0.070 / 0.120
G11     134.3          23.7               15.1 +/-    0.51      30.5 +/-    0.51  0.100 / 0.100
G23     159.6          27.9               12.8 +/-    1.28      23.4 +/-    1.28  0.040 / 0.040
G27     45.2           24.4                9.5 +/-    2.04      18.9 +/-    2.04  0.030 / 0.030
G28     248.6          37.2               13.5 +/-    2.07      20.6 +/-    2.07  0.090 / 0.160
G30     314.0          45.6               11.6 +/-    0.90      15.5 +/-    0.90  0.140 / 0.140