PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-21:43:00
G10     293.5          50.6                9.0 +/-    2.49      11.2 +/-    2.49  0.060 / 0.040
G15     47.6           35.7                7.8 +/-    0.80      12.3 +/-    0.80  0.040 / 0.040
G20     345.4          65.4                8.7 +/-    0.52       9.5 +/-    0.52  0.060 / 0.090
G21     86.2           75.6                8.9 +/-    0.67       9.1 +/-    0.67  0.060 / 0.090
G24     97.8           25.2               10.3 +/-    0.80      20.1 +/-    0.80  0.080 / 0.140
G27     304.3          32.2                8.1 +/-    1.63      13.6 +/-    1.63  0.090 / 0.130
G29     168.4          10.6               11.0 +/-    1.69      30.4 +/-    1.69  0.070 / 0.070
G32     209.2          30.2               11.0 +/-    1.52      19.2 +/-    1.52  0.070 / 0.070