PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-20:12:50
G01     55.4           28.7               11.0 +/-    0.81      19.9 +/-    0.81  0.080 / 0.350
G06     178.5          20.0              -25.6 +/-   16.60     -56.3 +/-   16.60  0.090 / 0.350
G07     144.3          18.4               16.9 +/-    1.30      38.7 +/-    1.30  0.040 / 0.060
G11     46.7           20.8               10.6 +/-    1.10      23.0 +/-    1.10  0.040 / 0.060
G13     257.2          33.3               15.9 +/-    1.35      26.1 +/-    1.35  0.100 / 0.240
G15     289.9          16.2               12.7 +/-    3.30      30.7 +/-    3.30  0.110 / 0.280
G17     269.7          76.0               16.7 +/-    0.37      17.1 +/-    0.37  0.030 / 0.060
G19     237.7          53.4               16.8 +/-    0.90      20.3 +/-    0.90  0.040 / 0.050
G28     43.7           55.0               14.3 +/-    0.64      17.0 +/-    0.64  0.080 / 0.230
G30     146.5          46.6               17.7 +/-    0.79      23.4 +/-    0.79  0.110 / 0.230