PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-19:43:00
G10     262.7          37.1               10.9 +/-    1.08      16.7 +/-    1.08  0.160 / 0.330
G13     43.7           20.4                8.5 +/-    1.19      18.5 +/-    1.19  0.130 / 0.340
G15     64.5           52.0               10.9 +/-    0.49      13.4 +/-    0.49  0.050 / 0.050
G20     291.5          59.0               11.2 +/-    0.67      12.8 +/-    0.67  0.050 / 0.050
G21     352.1          68.3               10.1 +/-    0.72      10.8 +/-    0.72  0.080 / 0.240
G24     125.7          11.5               12.6 +/-    2.44      34.0 +/-    2.44  0.090 / 0.310
G27     320.6          15.0                6.1 +/-    1.64      15.2 +/-    1.64  0.030 / 0.050
G29     166.7          36.7               11.0 +/-    1.69      16.9 +/-    1.69  0.030 / 0.050