PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/15-22:27:40
G07     35.2           68.5                9.4 +/-    0.54      10.1 +/-    0.54  0.230 / 0.230
G08     58.0           44.6                8.3 +/-    0.76      11.2 +/-    0.76  0.130 / 0.240
G09     179.2          46.8               10.6 +/-    0.86      13.9 +/-    0.86  0.140 / 0.270
G11     126.0          30.1               10.5 +/-    1.31      18.4 +/-    1.31  0.160 / 0.300
G18     108.6          11.8               10.2 +/-    2.22      27.5 +/-    2.22  0.040 / 0.040
G23     161.0          18.4               11.1 +/-    1.81      25.5 +/-    1.81  0.040 / 0.040
G27     40.4           17.2                6.1 +/-    2.78      14.3 +/-    2.78  0.060 / 0.060
G28     259.6          44.4                9.9 +/-    4.18      13.5 +/-    4.18  0.060 / 0.120
G30     322.3          52.5                8.1 +/-    0.74       9.9 +/-    0.74  0.050 / 0.060