PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-17:12:40
G01     44.9           21.1                9.5 +/-    0.84      20.4 +/-    0.84  0.140 / 0.080
G06     176.4          30.4               17.4 +/-    1.64      30.1 +/-    1.64  0.120 / 0.100
G13     243.3          27.5               14.4 +/-    1.01      26.5 +/-    1.01  0.040 / 0.080
G15     277.3          14.5               12.7 +/-    1.77      31.9 +/-    1.77  0.040 / 0.070
G17     333.6          76.6               14.0 +/-    0.90      14.3 +/-    0.90  0.100 / 0.080
G19     258.1          65.6               13.9 +/-    0.93      15.1 +/-    0.93  0.110 / 0.080
G24     318.2          12.8               10.4 +/-    0.81      27.3 +/-    0.81  0.030 / 0.010
G28     54.2           54.1               12.7 +/-    0.63      15.2 +/-    0.63  0.030 / 0.010
G30     151.5          32.7               15.5 +/-    0.94      25.8 +/-    0.94  0.070 / 0.060