PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-21:27:30
G02     203.1          35.1               17.2 +/-    1.09      27.3 +/-    1.09  0.130 / 0.340
G06     157.1          69.8               13.5 +/-    1.04      14.3 +/-    1.04  0.150 / 0.350
G12     307.9          16.1               10.1 +/-    2.46      24.4 +/-    2.46  0.070 / 0.090
G17     33.2           51.5               10.1 +/-    0.48      12.5 +/-    0.48  0.080 / 0.080
G19     357.3          65.9               11.0 +/-    1.04      11.9 +/-    1.04  0.090 / 0.100
G24     297.6          38.3               11.5 +/-    1.40      17.1 +/-    1.40  0.050 / 0.090
G28     102.7          31.0               12.5 +/-    1.04      21.5 +/-    1.04  0.040 / 0.040