PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-16:58:00
G07     344.6          61.8               13.0 +/-    0.46      14.5 +/-    0.46  0.040 / 0.040
G08     89.3           53.8               14.3 +/-    0.69      17.2 +/-    0.69  0.050 / 0.040
G09     184.6          65.4               13.0 +/-    0.67      14.1 +/-    0.67  0.060 / 0.070
G11     141.6          17.9               13.9 +/-    1.18      32.3 +/-    1.18  0.090 / 0.070
G23     156.2          29.0               13.9 +/-    1.10      24.8 +/-    1.10  0.030 / 0.040
G27     48.2           26.9               11.3 +/-    0.78      21.2 +/-    0.78  0.030 / 0.030
G28     244.2          35.8               14.0 +/-    2.59      21.9 +/-    2.59  0.150 / 0.100
G30     309.0          41.2               12.4 +/-    1.32      17.8 +/-    1.32  0.120 / 0.110