PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-21:27:50
G01     53.7           27.6                8.5 +/-    2.31      15.6 +/-    2.31  0.170 / 0.310
G06     180.4          17.9               13.7 +/-    1.57      31.8 +/-    1.57  0.170 / 0.280
G07     143.8          11.4               13.9 +/-    3.89      37.5 +/-    3.89  0.030 / 0.040
G11     45.3           18.0                9.6 +/-    2.00      22.1 +/-    2.00  0.040 / 0.050
G13     254.6          33.3               11.8 +/-    2.06      19.4 +/-    2.06  0.060 / 0.140
G15     287.3          16.4               10.4 +/-    2.35      24.9 +/-    2.35  0.070 / 0.110
G17     292.2          79.6               12.7 +/-    0.61      12.9 +/-    0.61  0.050 / 0.060
G19     239.1          56.2               12.0 +/-    2.67      14.1 +/-    2.67  0.050 / 0.050
G28     38.8           57.0               11.0 +/-    1.05      12.8 +/-    1.05  0.110 / 0.090
G30     147.1          44.8               13.5 +/-    0.62      18.2 +/-    0.62  0.070 / 0.090