PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/22-14:12:40
G01     65.4           31.6                4.9 +/-    0.86       8.3 +/-    0.86  0.080 / 0.140
G07     139.0          24.2                5.1 +/-    1.18      10.1 +/-    1.18  0.110 / 0.140
G11     50.9           28.7                5.6 +/-    1.70      10.1 +/-    1.70  0.030 / 0.040
G13     268.4          37.8                6.3 +/-    3.70       9.5 +/-    3.70  0.030 / 0.030
G15     299.1          15.8                4.3 +/-    2.39      10.4 +/-    2.39  0.040 / 0.050
G17     237.0          68.9                7.5 +/-    0.43       7.9 +/-    0.43  0.050 / 0.050
G18     45.3           15.7              -13.1 +/-    4.29     -32.0 +/-    4.29  0.130 / 0.120
G19     226.3          46.9                6.8 +/-    2.31       8.9 +/-    2.31  0.060 / 0.120
G28     14.2           60.5                6.2 +/-    1.73       7.0 +/-    1.73  0.150 / 1.540
G30     139.3          57.2                6.4 +/-    0.53       7.5 +/-    0.53  0.160 / 1.180