PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-15:42:30
G03     189.1          23.9               12.4 +/-    1.57      24.8 +/-    1.57  0.030 / 0.040
G07     287.7          39.2               13.4 +/-    0.99      19.8 +/-    0.99  0.040 / 0.040
G08     145.2          22.8               15.2 +/-    0.99      31.3 +/-    0.99  0.070 / 0.090
G09     320.3          55.0               12.2 +/-    1.44      14.5 +/-    1.44  0.040 / 0.080
G16     46.9           48.4               11.6 +/-    0.44      14.9 +/-    0.44  0.080 / 0.400
G23     71.1           83.1               12.2 +/-    0.47      12.3 +/-    0.47  0.110 / 0.390
G26     43.5           19.2               10.3 +/-    1.24      23.1 +/-    1.24  0.050 / 0.050
G27     109.1          30.3               13.8 +/-    0.88      23.9 +/-    0.88  0.060 / 0.040
G30     269.5          10.2              -15.1 +/-   24.96     -42.0 +/-   24.96  0.060 / 0.100