PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-18:28:00
G03     244.6          70.7                9.2 +/-    0.49       9.6 +/-    0.49  0.040 / 0.040
G09     299.8          13.2                8.9 +/-    2.88      23.2 +/-    2.88  0.050 / 0.040
G14     94.8           19.4                9.1 +/-    1.06      20.3 +/-    1.06  0.100 / 0.250
G16     136.4          54.6               12.5 +/-    0.95      14.9 +/-    0.95  0.110 / 0.220
G22     196.7          60.2               10.0 +/-    0.40      11.3 +/-    0.40  0.030 / 0.030
G23     316.2          46.2               10.1 +/-    0.72      13.4 +/-    0.72  0.030 / 0.050
G26     77.4           53.3               10.3 +/-    0.47      12.5 +/-    0.47  0.080 / 0.170
G31     49.7           23.1                7.1 +/-    1.66      14.4 +/-    1.66  0.100 / 0.180