PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-01:27:40
G08     318.2          13.0                6.8 +/-    2.00      17.8 +/-    2.00  0.170 / 0.330
G10     319.6          58.1                7.8 +/-    0.71       9.1 +/-    0.71  0.140 / 0.300
G14     213.9          22.4                8.9 +/-    1.68      18.5 +/-    1.68  0.040 / 0.050
G15     45.8           16.7                6.1 +/-    3.81      14.7 +/-    3.81  0.040 / 0.040
G20     20.3           63.2                8.5 +/-    1.18       9.4 +/-    1.18  0.070 / 0.070
G21     124.0          65.3               10.0 +/-    0.55      10.9 +/-    0.55  0.060 / 0.060
G24     84.2           29.9                8.8 +/-    2.23      15.5 +/-    2.23  0.140 / 0.220
G27     286.4          37.6               10.0 +/-    0.93      15.1 +/-    0.93  0.140 / 0.260
G32     216.7          43.1                9.3 +/-    0.84      12.9 +/-    0.84  0.040 / 0.030