PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-20:58:00
G01     101.1          28.4               14.2 +/-    1.18      25.8 +/-    1.18  0.090 / 0.060
G07     114.9          54.2               14.3 +/-    0.67      17.1 +/-    0.67  0.150 / 0.070
G08     42.1           19.2               10.3 +/-    1.30      23.1 +/-    1.30  0.070 / 0.040
G11     83.2           43.2               13.5 +/-    0.66      18.6 +/-    0.66  0.060 / 0.040
G13     304.9          31.6               12.3 +/-    0.82      20.8 +/-    0.82  0.070 / 0.140
G17     209.7          39.3               13.4 +/-    1.18      19.7 +/-    1.18  0.080 / 0.150
G18     74.6           24.9               12.3 +/-    1.09      24.1 +/-    1.09  0.030 / 0.010
G19     211.0          17.6                6.4 +/-   21.42      14.8 +/-   21.42  0.030 / 0.010
G28     330.6          61.7               12.0 +/-    0.30      13.4 +/-    0.30  0.030 / 0.010
G30     66.2           78.8               15.2 +/-    0.91      15.4 +/-    0.91  0.030 / 0.010