PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-20:27:50
G01     40.2           14.9               10.1 +/-    2.50      25.0 +/-    2.50  0.090 / 0.200
G06     173.5          42.2               14.9 +/-    0.87      21.0 +/-    0.87  0.090 / 0.230
G13     236.1          20.7               15.3 +/-    4.00      33.1 +/-    4.00  0.410 / 0.320
G15     269.8          11.5               13.6 +/-    2.05      36.8 +/-    2.05  0.120 / 0.240
G17     358.2          70.5               13.2 +/-    0.41      14.0 +/-    0.41  0.090 / 0.160
G19     280.0          68.7               13.9 +/-    0.83      14.8 +/-    0.83  0.100 / 0.150
G24     315.7          21.2               10.7 +/-    2.81      22.9 +/-    2.81  0.130 / 0.370
G28     74.5           45.7               12.2 +/-    1.30      16.3 +/-    1.30  0.120 / 0.320
G30     155.0          25.0               16.0 +/-    2.08      31.4 +/-    2.08  0.050 / 0.060