PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/25-16:57:50
G02     202.9          29.0               12.0 +/-    1.45      21.5 +/-    1.45  0.090 / 0.090
G06     159.9          66.5                9.0 +/-    0.32       9.7 +/-    0.32  0.090 / 0.100
G12     306.6          15.7                6.0 +/-    2.39      14.7 +/-    2.39  0.150 / 0.260
G17     32.8           51.7                8.4 +/-    1.00      10.4 +/-    1.00  0.290 / 0.240
G19     343.9          68.1                7.5 +/-    0.61       8.0 +/-    0.61  0.040 / 0.040
G24     300.6          37.2                8.0 +/-    1.28      12.2 +/-    1.28  0.050 / 0.030
G28     98.8           33.7               10.6 +/-    1.11      17.3 +/-    1.11  0.030 / 0.030