PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/12-20:27:50
G10     268.7          40.5               13.9 +/-    1.31      20.1 +/-    1.31  0.050 / 0.060
G13     41.0           16.3               10.8 +/-    2.29      26.0 +/-    2.29  0.050 / 0.050
G15     58.3           48.5               12.5 +/-    1.37      16.1 +/-    1.37  0.180 / 0.280
G16     277.6          12.3               13.6 +/-    1.34      36.2 +/-    1.34  0.150 / 0.370
G20     301.7          61.3               12.8 +/-    0.92      14.4 +/-    0.92  0.030 / 0.040
G21     3.7            71.9               14.2 +/-    0.78      14.8 +/-    0.78  0.030 / 0.040
G24     121.1          14.7               17.1 +/-    1.52      42.9 +/-    1.52  0.200 / 0.450
G27     318.5          19.4               11.6 +/-    1.13      25.9 +/-    1.13  0.180 / 0.510
G29     167.4          30.7               15.6 +/-    1.31      27.0 +/-    1.31  0.060 / 0.080