PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-12:27:40
G01     223.2          13.8                6.0 +/-    5.92      15.3 +/-    5.92  0.200 / 0.390
G03     270.4          70.4                5.5 +/-    0.50       5.8 +/-    0.50  0.210 / 0.470
G09     296.8          10.5              -12.9 +/-   24.25     -35.6 +/-   24.25  0.110 / 0.210
G14     88.7           25.4                6.8 +/-    1.24      13.2 +/-    1.24  0.100 / 0.180
G16     139.6          50.4                8.5 +/-    0.79      10.7 +/-    0.79  0.030 / 0.050
G22     198.3          64.3                6.6 +/-    0.50       7.2 +/-    0.50  0.040 / 0.050
G23     313.6          44.3                5.2 +/-    1.26       7.0 +/-    1.26  0.040 / 0.070
G26     85.1           53.6                6.3 +/-    0.59       7.6 +/-    0.59  0.040 / 0.060
G31     47.8           26.2                5.2 +/-    0.64       9.9 +/-    0.64  0.030 / 0.060