PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-20:12:40
G07     138.8          21.7               15.3 +/-    1.17      32.3 +/-    1.17  0.120 / 0.380
G11     50.5           27.5                9.6 +/-    0.99      17.7 +/-    0.99  0.130 / 0.340
G13     268.9          37.7               16.8 +/-    1.41      25.4 +/-    1.41  0.030 / 0.050
G15     298.5          16.2               11.8 +/-    2.66      28.5 +/-    2.66  0.040 / 0.050
G17     240.1          72.8               15.8 +/-    0.86      16.5 +/-    0.86  0.050 / 0.120
G18     44.7           14.9                8.7 +/-    1.45      21.7 +/-    1.45  0.080 / 0.110
G19     226.3          45.7               17.6 +/-    1.18      23.4 +/-    1.18  0.050 / 0.080
G28     17.3           60.1               13.6 +/-    0.64      15.5 +/-    0.64  0.050 / 0.080
G30     139.0          56.4               14.4 +/-    0.75      16.9 +/-    0.75  0.090 / 0.280