PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-21:12:50
G10     295.3          51.2               10.0 +/-    2.07      12.5 +/-    2.07  0.040 / 0.040
G15     47.2           34.1                8.9 +/-    1.39      14.3 +/-    1.39  0.040 / 0.030
G20     348.5          65.4               10.1 +/-    0.59      11.0 +/-    0.59  0.070 / 0.100
G21     91.3           74.8               11.2 +/-    0.59      11.5 +/-    0.59  0.050 / 0.120
G24     96.3           25.6               12.1 +/-    1.30      23.3 +/-    1.30  0.100 / 0.140
G27     303.2          32.7                9.3 +/-    1.33      15.3 +/-    1.33  0.110 / 0.120
G32     209.7          31.3               11.8 +/-    0.93      20.1 +/-    0.93  0.060 / 0.060