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               12.7 +/-    1.06      23.8 +/-    1.06  0.030 / 0.050
G07     114.7          49.3               13.4 +/-    0.58      17.1 +/-    0.58  0.030 / 0.040
G08     41.5           16.9               10.2 +/-    2.02      24.2 +/-    2.02  0.030 / 0.030
G09     174.9          11.9               15.0 +/-    1.63      40.2 +/-    1.63  0.040 / 0.020
G11     82.4           42.8               13.6 +/-    0.80      18.9 +/-    0.80  0.040 / 0.050
G13     306.4          31.5               12.5 +/-    0.92      21.2 +/-    0.92  0.050 / 0.040
G17     206.4          41.8               15.0 +/-    1.10      21.2 +/-    1.10  0.060 / 0.150
G18     74.3           24.0               11.7 +/-    1.46      23.4 +/-    1.46  0.070 / 0.120
G28     315.5          60.0               11.9 +/-    0.99      13.6 +/-    0.99  0.070 / 0.130
G30     51.0           79.3               12.9 +/-    0.71      13.1 +/-    0.71  0.080 / 0.150