PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-22:28:00
G07     2.2            66.1               12.0 +/-    0.66      13.0 +/-    0.66  0.030 / 0.050
G08     73.9           52.3               11.0 +/-    0.59      13.5 +/-    0.59  0.030 / 0.040
G09     182.3          56.5               13.2 +/-    2.22      15.5 +/-    2.22  0.040 / 0.110
G11     137.2          23.0               14.0 +/-    0.95      28.7 +/-    0.95  0.040 / 0.100
G23     158.9          23.0               12.2 +/-    1.75      25.0 +/-    1.75  0.070 / 0.140
G27     42.6           20.4                8.7 +/-    1.03      19.1 +/-    1.03  0.100 / 0.140
G28     253.4          42.5               12.4 +/-    1.07      17.3 +/-    1.07  0.050 / 0.240
G30     319.1          50.0               10.2 +/-    0.99      12.9 +/-    0.99  0.050 / 0.180