PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-19:58:00
G10     256.6          33.0               12.2 +/-    2.23      20.1 +/-    2.23  0.050 / 0.060
G13     47.6           24.7                9.9 +/-    0.82      19.4 +/-    0.82  0.060 / 0.050
G15     74.4           55.8               10.5 +/-    0.25      12.5 +/-    0.25  0.070 / 0.200
G16     288.8          15.2                8.0 +/-    3.88      19.7 +/-    3.88  0.060 / 0.190
G20     280.8          55.6               12.3 +/-    0.75      14.6 +/-    0.75  0.190 / 0.600
G21     342.0          64.0               10.4 +/-    1.01      11.4 +/-    1.01  0.180 / 0.500
G26     262.1          12.8               10.9 +/-    1.56      28.5 +/-    1.56  0.030 / 0.050
G29     165.4          43.3               13.0 +/-    1.01      18.0 +/-    1.01  0.040 / 0.040