PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-00:28:00
G01     98.3           29.5                8.6 +/-    0.74      15.2 +/-    0.74  0.040 / 0.060
G07     118.0          51.9               10.6 +/-    0.40      13.1 +/-    0.40  0.050 / 0.060
G08     42.0           15.5                6.4 +/-    1.90      15.6 +/-    1.90  0.100 / 0.310
G11     81.1           43.3                9.6 +/-    0.49      13.3 +/-    0.49  0.110 / 0.230
G13     302.8          32.6               10.3 +/-    1.36      17.2 +/-    1.36  0.070 / 0.150
G17     210.5          44.6               13.0 +/-    0.87      17.6 +/-    0.87  0.070 / 0.120
G19     211.7          20.8               11.0 +/-    1.10      23.7 +/-    1.10  0.080 / 0.060
G28     336.3          61.9                8.9 +/-    0.75      10.0 +/-    0.75  0.040 / 0.050
G30     86.8           76.5                9.7 +/-    1.08      10.0 +/-    1.08  0.060 / 0.140