PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/27-18:58:00
G10     255.5          32.2               20.8 +/-    1.83      34.9 +/-    1.83  0.040 / 0.060
G13     48.5           25.4               15.6 +/-    0.64      30.2 +/-    0.64  0.060 / 0.050
G15     75.5           55.8               17.0 +/-    0.69      20.0 +/-    0.69  0.080 / 0.170
G20     279.3          55.2               18.8 +/-    0.69      22.4 +/-    0.69  0.070 / 0.200
G21     340.5          63.2               15.8 +/-    0.48      17.5 +/-    0.48  0.030 / 0.050
G26     263.1          13.3               18.7 +/-    2.30      48.3 +/-    2.30  0.040 / 0.050
G29     165.2          44.9               19.6 +/-    1.17      26.4 +/-    1.17  0.050 / 0.070