PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-19:12:50
G01     103.1          26.9               14.1 +/-    0.64      26.5 +/-    0.64  0.030 / 0.030
G07     114.7          49.3               13.4 +/-    0.53      17.1 +/-    0.53  0.030 / 0.040
G08     41.5           16.9                9.9 +/-    0.45      23.5 +/-    0.45  0.030 / 0.060
G09     174.9          11.9               14.2 +/-    1.77      37.9 +/-    1.77  0.030 / 0.050
G11     82.4           42.8               13.0 +/-    0.59      18.1 +/-    0.59  0.040 / 0.050
G13     306.4          31.5               11.8 +/-    1.07      20.0 +/-    1.07  0.040 / 0.060
G17     206.4          41.8               15.3 +/-    1.31      21.6 +/-    1.31  0.070 / 0.160
G18     74.3           24.0               11.6 +/-    0.58      23.1 +/-    0.58  0.080 / 0.140
G28     315.5          60.0               11.4 +/-    0.84      12.9 +/-    0.84  0.090 / 0.150
G30     51.0           79.3               11.4 +/-    0.75      11.5 +/-    0.75  0.070 / 0.160