PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/25-20:28:00
G10     300.6          53.6                8.6 +/-    1.46      10.5 +/-    1.46  0.040 / 0.040
G15     46.0           27.1                7.8 +/-    1.72      14.5 +/-    1.72  0.040 / 0.040
G20     358.0          65.1                8.9 +/-    0.51       9.7 +/-    0.51  0.070 / 0.180
G21     97.2           74.2               10.9 +/-    0.48      11.3 +/-    0.48  0.160 / 0.150
G24     98.5           27.0                9.8 +/-    1.26      18.3 +/-    1.26  0.080 / 0.110
G27     300.0          34.7                8.9 +/-    1.03      14.2 +/-    1.03  0.080 / 0.130
G32     210.3          33.4               11.3 +/-    0.97      18.5 +/-    0.97  0.060 / 0.090