PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-00:28:00
G08     298.3          21.0                7.8 +/-    1.61      16.8 +/-    1.61  0.050 / 0.090
G10     10.5           62.7                7.2 +/-    0.70       8.0 +/-    0.70  0.050 / 0.100
G14     228.7          44.7               13.8 +/-    1.01      18.7 +/-    1.01  0.090 / 0.100
G20     65.3           52.2               10.0 +/-    0.41      12.3 +/-    0.41  0.070 / 0.140
G21     146.8          41.7               11.8 +/-    0.84      16.7 +/-    0.84  0.050 / 0.030
G24     57.2           26.2                9.8 +/-    1.07      18.5 +/-    1.07  0.050 / 0.030
G27     255.1          32.3               10.4 +/-    1.94      17.4 +/-    1.94  0.040 / 0.090
G32     244.2          67.3               10.7 +/-    0.65      11.5 +/-    0.65  0.050 / 0.100