PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-18:27:50
G01     96.2           30.2               12.8 +/-    0.72      22.2 +/-    0.72  0.170 / 0.460
G07     120.2          50.4               13.1 +/-    0.69      16.5 +/-    0.69  0.100 / 0.600
G08     42.0           13.6                8.5 +/-    3.15      21.9 +/-    3.15  0.030 / 0.030
G11     75.9           42.0               11.2 +/-    1.30      15.8 +/-    1.30  0.030 / 0.030
G13     300.4          34.0               10.4 +/-    2.42      16.8 +/-    2.42  0.020 / 0.020
G17     211.7          45.4               14.6 +/-    1.08      19.6 +/-    1.08  0.030 / 0.020
G18     69.6           24.7               10.8 +/-    1.77      21.2 +/-    1.77  0.070 / 0.110
G19     212.6          20.8               16.0 +/-    2.63      34.4 +/-    2.63  0.070 / 0.130
G28     339.1          61.9               10.5 +/-    0.49      11.8 +/-    0.49  0.070 / 0.100
G30     83.9           78.5               12.7 +/-    0.51      13.0 +/-    0.51  0.070 / 0.100