PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-15:27:40
G01     70.6           32.6                8.9 +/-    1.30      14.8 +/-    1.30  0.060 / 0.100
G07     137.1          27.7                9.6 +/-    1.18      17.6 +/-    1.18  0.050 / 0.090
G11     52.6           27.9                5.6 +/-    0.58      10.2 +/-    0.58  0.030 / 0.040
G13     276.9          36.9               11.0 +/-    1.02      16.8 +/-    1.02  0.030 / 0.040
G15     305.7          13.8                7.6 +/-    1.86      19.5 +/-    1.86  0.050 / 0.110
G17     234.9          71.7               11.5 +/-    0.88      12.0 +/-    0.88  0.050 / 0.110
G19     224.3          44.0               14.6 +/-    2.37      20.0 +/-    2.37  0.040 / 0.040
G28     19.5           59.2               10.0 +/-    0.32      11.4 +/-    0.32  0.030 / 0.080
G30     134.2          64.4                9.5 +/-    0.81      10.4 +/-    0.81  0.080 / 0.120