PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-15:58:00
G03     185.7          14.4               18.0 +/-    5.65      45.5 +/-    5.65  0.140 / 0.440
G07     299.2          45.1               12.8 +/-    1.89      17.2 +/-    1.89  0.130 / 0.350
G08     137.7          31.5               15.9 +/-    0.86      26.9 +/-    0.86  0.050 / 0.090
G09     319.2          65.7               12.8 +/-    1.11      13.9 +/-    1.11  0.050 / 0.080
G16     42.7           38.3                9.3 +/-    1.36      13.9 +/-    1.36  0.200 / 0.390
G23     127.0          75.7               14.3 +/-    1.00      14.7 +/-    1.00  0.150 / 0.330
G26     44.4           10.3                7.6 +/-    3.52      21.0 +/-    3.52  0.050 / 0.120
G27     96.9           35.2               14.1 +/-    0.70      22.3 +/-    0.70  0.060 / 0.090
G30     277.5          16.5               13.1 +/-    1.30      31.3 +/-    1.30  0.050 / 0.090