PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-13:57:30
G07     39.9           68.4                7.8 +/-    0.92       8.4 +/-    0.92  0.070 / 0.180
G08     60.3           47.2                6.7 +/-    0.86       8.8 +/-    0.86  0.080 / 0.170
G09     180.1          47.1                8.7 +/-    0.42      11.4 +/-    0.42  0.080 / 0.140
G11     126.6          30.7                8.8 +/-    0.84      15.2 +/-    0.84  0.070 / 0.140
G18     110.3          12.1                8.2 +/-    2.28      21.9 +/-    2.28  0.040 / 0.030
G23     159.4          13.8                6.1 +/-    1.80      15.7 +/-    1.80  0.030 / 0.040
G27     39.5           15.3                6.8 +/-    2.59      16.9 +/-    2.59  0.080 / 0.240
G28     259.0          42.9                8.2 +/-    2.24      11.4 +/-    2.24  0.110 / 0.340
G30     326.3          55.8                7.6 +/-    0.48       9.0 +/-    0.48  0.140 / 0.270