PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-20:42:50
G10     288.7          49.7               11.6 +/-    0.69      14.7 +/-    0.69  0.070 / 0.120
G15     47.8           34.6                9.0 +/-    0.67      14.4 +/-    0.67  0.070 / 0.100
G20     338.0          65.2                9.2 +/-    0.76      10.0 +/-    0.76  0.040 / 0.040
G21     64.4           77.2               12.9 +/-    0.74      13.2 +/-    0.74  0.040 / 0.050
G24     106.7          23.5               11.3 +/-    1.25      22.8 +/-    1.25  0.040 / 0.070
G27     307.9          30.6               10.6 +/-    1.56      18.3 +/-    1.56  0.040 / 0.070
G29     168.1          14.7               17.1 +/-    3.28      42.9 +/-    3.28  0.090 / 0.220
G32     207.4          25.3               13.4 +/-    1.69      26.0 +/-    1.69  0.110 / 0.210