PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/20-16:42:30
G10     303.9          54.6                8.7 +/-    1.47      10.4 +/-    1.47  0.140 / 0.090
G15     45.5           22.8                5.6 +/-    2.67      11.5 +/-    2.67  0.080 / 0.110
G20     6.3            64.5                9.8 +/-    0.59      10.7 +/-    0.59  0.040 / 0.040
G21     104.6          72.0                9.3 +/-    1.49       9.8 +/-    1.49  0.040 / 0.040
G24     96.5           27.8                8.3 +/-    0.94      15.3 +/-    0.94  0.070 / 0.040
G27     297.6          35.7               11.2 +/-    1.30      17.6 +/-    1.30  0.060 / 0.060
G32     210.9          36.2               10.7 +/-    0.86      16.6 +/-    0.86  0.110 / 0.140