PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-19:57:50
G10     256.6          33.0                9.7 +/-    2.54      16.0 +/-    2.54  0.050 / 0.040
G13     47.6           24.7               10.3 +/-    2.01      20.2 +/-    2.01  0.060 / 0.060
G15     74.4           55.8               10.8 +/-    0.81      12.7 +/-    0.81  0.090 / 0.150
G16     288.8          15.2                7.8 +/-    2.57      19.2 +/-    2.57  0.070 / 0.220
G20     280.8          55.6                9.9 +/-    2.02      11.7 +/-    2.02  0.040 / 0.040
G21     342.0          64.0               11.3 +/-    0.80      12.5 +/-    0.80  0.040 / 0.040
G26     262.1          12.8                9.2 +/-    1.01      24.2 +/-    1.01  0.230 / 0.380
G29     165.4          43.3               12.1 +/-    0.65      16.8 +/-    0.65  0.180 / 0.310