PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-19:27:50
G01     94.8           30.7               17.4 +/-    0.63      30.1 +/-    0.63  0.070 / 0.150
G07     121.6          49.4               17.7 +/-    0.58      22.5 +/-    0.58  0.090 / 0.180
G08     42.2           13.2                9.7 +/-    1.66      25.1 +/-    1.66  0.030 / 0.030
G11     74.7           41.8               16.7 +/-    0.82      23.7 +/-    0.82  0.030 / 0.030
G13     299.1          34.4               14.1 +/-    1.55      22.7 +/-    1.55  0.070 / 0.140
G17     212.6          45.9               17.9 +/-    0.94      23.8 +/-    0.94  0.080 / 0.140
G18     68.3           24.6               14.6 +/-    0.66      28.8 +/-    0.66  0.050 / 0.090
G19     213.1          22.3               19.7 +/-    1.18      41.0 +/-    1.18  0.040 / 0.080
G28     341.9          61.9               14.1 +/-    0.76      15.8 +/-    0.76  0.040 / 0.050
G30     91.4           77.5               16.8 +/-    0.54      17.2 +/-    0.54  0.040 / 0.060