PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-18:57:40
G01     121.5          15.4               14.2 +/-    1.08      35.0 +/-    1.08  0.030 / 0.040
G07     82.6           63.3               13.2 +/-    0.48      14.6 +/-    0.48  0.040 / 0.030
G08     46.2           33.6               11.1 +/-    1.43      18.0 +/-    1.43  0.100 / 0.090
G09     178.1          30.7               13.8 +/-    1.16      23.8 +/-    1.16  0.060 / 0.120
G11     109.4          39.2               14.1 +/-    1.23      20.9 +/-    1.23  0.160 / 0.260
G13     318.8          17.5               11.6 +/-    2.31      27.1 +/-    2.31  0.120 / 0.240
G17     200.2          21.7               12.5 +/-    2.25      26.4 +/-    2.25  0.110 / 0.110
G18     95.2           19.4               12.9 +/-    1.74      28.9 +/-    1.74  0.100 / 0.130
G28     280.8          52.9               14.4 +/-    2.59      17.6 +/-    2.59  0.040 / 0.030
G30     343.7          67.1               12.7 +/-    0.64      13.6 +/-    0.64  0.030 / 0.030