PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-21:57:30
G10     295.2          51.2                9.0 +/-    1.96      11.1 +/-    1.96  0.030 / 0.040
G15     47.3           34.8                8.4 +/-    1.08      13.4 +/-    1.08  0.030 / 0.030
G20     348.4          65.4                8.5 +/-    0.59       9.2 +/-    0.59  0.070 / 0.080
G21     90.6           75.0                9.8 +/-    0.44      10.2 +/-    0.44  0.050 / 0.100
G24     96.6           25.6               11.6 +/-    1.10      22.4 +/-    1.10  0.080 / 0.130
G27     303.1          32.8                7.9 +/-    1.16      13.0 +/-    1.16  0.080 / 0.140
G32     209.6          31.5               10.0 +/-    1.01      17.0 +/-    1.01  0.050 / 0.060