PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/19-21:13:00
G07     336.0          59.3               12.7 +/-    0.63      14.5 +/-    0.63  0.030 / 0.040
G08     99.5           50.6               14.0 +/-    0.65      17.5 +/-    0.65  0.040 / 0.040
G09     195.8          76.4               11.9 +/-    0.50      12.2 +/-    0.50  0.080 / 0.060
G11     145.8          12.7               16.9 +/-    3.41      44.5 +/-    3.41  0.090 / 0.080
G16     45.7           12.6                8.5 +/-    3.72      22.5 +/-    3.72  0.280 / 0.190
G23     155.4          46.0               14.0 +/-    1.25      18.6 +/-    1.25  0.160 / 0.250
G27     59.7           34.6               12.2 +/-    1.51      19.5 +/-    1.51  0.030 / 0.020
G28     234.4          24.5               15.4 +/-    1.83      30.4 +/-    1.83  0.040 / 0.030
G30     299.9          33.4               11.0 +/-    1.93      18.0 +/-    1.93  0.050 / 0.040