PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-09:43:10
G03     241.0          67.1               12.5 +/-    2.28      13.5 +/-    2.28  0.100 / 0.230
G07     249.5          11.0               -6.7 +/-    7.19     -18.2 +/-    7.19  0.090 / 0.210
G09     305.1          21.2                4.3 +/-    1.55       9.2 +/-    1.55  0.060 / 0.050
G14     101.9          11.7                1.9 +/-    3.40       5.0 +/-    3.40  0.060 / 0.050
G16     125.1          60.5               15.4 +/-    3.47      17.4 +/-    3.47  0.040 / 0.060
G22     191.7          53.2                7.2 +/-    0.57       8.7 +/-    0.57  0.060 / 0.050
G23     319.6          49.2               17.3 +/-    5.13      22.1 +/-    5.13  0.030 / 0.040
G26     67.9           51.8             -107.8 +/-   46.48    -133.1 +/-   46.48  0.030 / 0.040
G31     52.9           18.3               14.6 +/-    7.79      33.5 +/-    7.79  0.150 / 0.370