PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-16:58:10
G02     200.9          18.7               10.2 +/-    1.53      23.2 +/-    1.53  0.150 / 0.270
G06     168.6          54.9               13.0 +/-    1.23      15.6 +/-    1.23  0.160 / 0.320
G13     227.4          13.3                9.1 +/-    2.31      23.5 +/-    2.31  0.080 / 0.120
G17     21.3           60.2               10.5 +/-    0.96      11.9 +/-    0.96  0.090 / 0.140
G19     311.4          70.4               10.3 +/-    0.52      10.9 +/-    0.52  0.200 / 0.890
G24     309.6          30.3               10.7 +/-    1.32      18.5 +/-    1.32  0.260 / 0.720
G28     87.4           40.1               10.2 +/-    1.74      14.9 +/-    1.74  0.050 / 0.040
G30     157.4          15.8               11.6 +/-    1.86      28.2 +/-    1.86  0.040 / 0.040