PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-16:42:50
G01     54.5           27.9                8.0 +/-    2.35      14.6 +/-    2.35  0.040 / 0.050
G06     178.8          18.8               -9.0 +/-   39.96     -20.5 +/-   39.96  0.040 / 0.050
G07     143.4          13.5               10.4 +/-    3.02      26.9 +/-    3.02  0.210 / 0.320
G11     45.9           19.8                8.8 +/-    2.49      19.6 +/-    2.49  0.160 / 0.290
G13     255.6          34.0               14.4 +/-    1.01      23.2 +/-    1.01  0.110 / 0.350
G15     288.6          16.4                9.7 +/-    1.86      23.3 +/-    1.86  0.140 / 0.240
G17     273.7          77.7               12.4 +/-    0.50      12.6 +/-    0.50  0.050 / 0.120
G19     237.8          56.2               12.5 +/-    2.34      14.7 +/-    2.34  0.050 / 0.150
G28     34.7           58.0               10.0 +/-    0.78      11.6 +/-    0.78  0.030 / 0.020
G30     146.2          44.7               11.9 +/-    1.14      16.1 +/-    1.14  0.030 / 0.030