PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-21:28:00
G10     294.4          50.9                9.9 +/-    0.79      12.3 +/-    0.79  0.060 / 0.120
G15     47.4           34.9                8.1 +/-    0.46      12.9 +/-    0.46  0.070 / 0.110
G20     347.0          65.4                9.0 +/-    0.60       9.8 +/-    0.60  0.040 / 0.040
G21     88.8           75.2               11.3 +/-    0.95      11.7 +/-    0.95  0.040 / 0.040
G24     97.0           25.4               10.4 +/-    1.36      20.2 +/-    1.36  0.070 / 0.130
G27     303.8          32.4               10.3 +/-    1.28      17.1 +/-    1.28  0.080 / 0.170
G32     209.4          30.8               13.3 +/-    1.85      23.0 +/-    1.85  0.050 / 0.080