PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/11-16:58:00
G07     309.0          49.5               11.4 +/-    1.62      14.4 +/-    1.62  0.030 / 0.030
G08     129.6          38.5               14.0 +/-    0.56      20.8 +/-    0.56  0.030 / 0.030
G09     311.7          74.6               12.8 +/-    1.14      13.3 +/-    1.14  0.070 / 0.050
G16     41.9           30.7               10.3 +/-    1.14      17.8 +/-    1.14  0.040 / 0.070
G23     141.2          67.3               13.3 +/-    0.50      14.3 +/-    0.50  0.070 / 0.060
G27     85.7           37.5               13.0 +/-    0.99      19.7 +/-    0.99  0.050 / 0.060
G30     284.0          21.4               11.0 +/-    1.53      23.5 +/-    1.53  0.180 / 0.240