PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-21:28:00
G07     317.7          51.5               10.6 +/-    1.44      13.1 +/-    1.44  0.140 / 0.380
G08     120.2          47.0               14.0 +/-    1.17      18.4 +/-    1.17  0.140 / 0.560
G09     247.3          82.5               10.4 +/-    1.10      10.5 +/-    1.10  0.050 / 0.060
G16     43.6           16.5                8.2 +/-    0.82      19.8 +/-    0.82  0.050 / 0.060
G23     150.2          51.6               11.7 +/-    0.74      14.5 +/-    0.74  0.070 / 0.190
G27     66.2           35.6                9.2 +/-    0.61      14.4 +/-    0.61  0.060 / 0.170
G28     229.7          21.2               11.6 +/-    1.47      24.8 +/-    1.47  0.050 / 0.070
G30     295.3          31.3               11.0 +/-    1.22      18.7 +/-    1.22  0.040 / 0.080