PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-18:57:50
G02     232.6          71.1               11.6 +/-    0.48      12.1 +/-    0.48  0.290 / 0.250
G05     173.1          13.3               14.9 +/-    2.39      38.8 +/-    2.39  0.180 / 0.230
G06     42.0           60.0               11.8 +/-    0.60      13.4 +/-    0.60  0.070 / 0.090
G12     322.4          52.0               10.8 +/-    0.65      13.3 +/-    0.65  0.100 / 0.100
G17     68.2           24.4               11.7 +/-    2.91      23.1 +/-    2.91  0.030 / 0.030
G19     51.1           43.2               11.0 +/-    1.99      15.2 +/-    1.99  0.040 / 0.030
G24     247.4          36.6               12.8 +/-    1.80      19.8 +/-    1.80  0.030 / 0.050