PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-15:58:10
G03     186.7          17.2               12.5 +/-    2.44      29.6 +/-    2.44  0.190 / 0.170
G07     295.5          43.2               13.8 +/-    3.21      19.1 +/-    3.21  0.190 / 0.200
G08     140.1          28.8               13.1 +/-    1.23      23.5 +/-    1.23  0.030 / 0.020
G09     320.1          62.3               12.3 +/-    0.70      13.7 +/-    0.70  0.030 / 0.030
G16     43.5           41.5               10.4 +/-    0.98      14.8 +/-    0.98  0.060 / 0.100
G23     117.1          78.8               12.2 +/-    0.57      12.4 +/-    0.57  0.060 / 0.080
G26     44.0           13.1                8.7 +/-    3.49      22.7 +/-    3.49  0.040 / 0.040
G27     100.9          33.9               13.7 +/-    1.15      22.2 +/-    1.15  0.030 / 0.040
G30     275.0          14.5               12.2 +/-    1.33      30.7 +/-    1.33  0.160 / 0.300