PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/15-16:27:50
G03     229.2          68.2               10.8 +/-    1.91      11.5 +/-    1.91  0.040 / 0.060
G07     248.5          11.1                7.0 +/-   20.27      19.0 +/-   20.27  0.070 / 0.070
G09     303.0          17.4                8.5 +/-    2.03      20.0 +/-    2.03  0.080 / 0.320
G14     99.7           13.7               11.0 +/-    1.74      28.4 +/-    1.74  0.110 / 0.400
G16     137.7          56.8               12.2 +/-    0.99      14.3 +/-    0.99  0.050 / 0.050
G22     191.2          53.1               11.4 +/-    2.31      13.8 +/-    2.31  0.040 / 0.050
G23     318.4          48.1                8.7 +/-    1.08      11.2 +/-    1.08  0.030 / 0.060
G26     74.9           54.7               11.0 +/-    0.59      13.1 +/-    0.59  0.040 / 0.040
G31     51.7           21.5                7.4 +/-    2.23      15.6 +/-    2.23  0.140 / 0.420