PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-16:12:30
G07     344.6          61.9               13.2 +/-    0.82      14.7 +/-    0.82  0.040 / 0.040
G08     88.4           53.6               13.3 +/-    0.41      16.1 +/-    0.41  0.040 / 0.060
G09     184.1          65.1               13.9 +/-    0.75      15.2 +/-    0.75  0.070 / 0.090
G11     141.3          18.0               12.8 +/-    0.76      29.7 +/-    0.76  0.070 / 0.080
G23     156.4          29.6               14.0 +/-    1.43      24.6 +/-    1.43  0.030 / 0.090
G27     48.3           27.0               10.9 +/-    1.72      20.3 +/-    1.72  0.040 / 0.040
G28     244.2          35.8               16.0 +/-    1.53      25.0 +/-    1.53  0.090 / 0.300
G30     308.7          40.9               12.2 +/-    1.47      17.4 +/-    1.47  0.100 / 0.320