PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-19:57:50
G10     266.0          39.0               12.8 +/-    1.00      19.0 +/-    1.00  0.090 / 0.150
G13     42.1           18.2                8.1 +/-    0.90      18.7 +/-    0.90  0.100 / 0.160
G15     60.7           50.0               11.3 +/-    0.47      14.2 +/-    0.47  0.070 / 0.050
G16     279.8          13.1                9.4 +/-    1.27      24.4 +/-    1.27  0.060 / 0.060
G20     297.1          60.3               10.3 +/-    0.85      11.7 +/-    0.85  0.080 / 0.260
G21     358.2          70.3               12.0 +/-    0.52      12.6 +/-    0.52  0.090 / 0.270
G24     123.2          13.3               11.8 +/-    2.73      30.6 +/-    2.73  0.160 / 0.330
G27     319.5          17.5                8.3 +/-    1.85      19.5 +/-    1.85  0.130 / 0.300
G29     167.1          33.4               13.6 +/-    0.94      22.3 +/-    0.94  0.030 / 0.060