PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-21:43:00
G01     47.5           23.5               10.3 +/-    0.77      20.8 +/-    0.77  0.100 / 0.290
G06     176.8          28.8               18.5 +/-    1.45      33.3 +/-    1.45  0.210 / 0.270
G11     44.3           13.5                8.9 +/-    1.08      23.0 +/-    1.08  0.040 / 0.060
G13     247.4          28.5               15.2 +/-    1.72      27.4 +/-    1.72  0.040 / 0.070
G15     280.6          15.1               11.5 +/-    2.02      28.4 +/-    2.02  0.060 / 0.120
G17     309.9          77.1               13.2 +/-    0.94      13.5 +/-    0.94  0.050 / 0.130
G19     251.9          61.5               12.9 +/-    1.03      14.4 +/-    1.03  0.160 / 0.570
G24     318.8          10.8              -17.6 +/-   18.40     -48.3 +/-   18.40  0.080 / 0.240
G28     57.9           51.3               12.4 +/-    0.52      15.4 +/-    0.52  0.080 / 0.260
G30     150.8          36.6               16.0 +/-    1.23      24.6 +/-    1.23  0.090 / 0.140