PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-15:13:00
G01     77.3           33.3               18.4 +/-   32.18      30.2 +/-   32.18  0.030 / 0.250
G07     134.0          36.0               19.8 +/-   32.47      30.8 +/-   32.47  0.030 / 0.040
G11     57.5           33.9               16.0 +/-   32.50      25.9 +/-   32.50  0.050 / 0.300
G13     281.2          37.9               18.8 +/-   32.44      28.4 +/-   32.44  0.070 / 0.130
G15     309.2          12.5               13.1 +/-   31.59      34.7 +/-   31.59  0.050 / 0.260
G17     225.0          64.0               26.0 +/-   32.60      28.6 +/-   32.60  0.040 / 0.080
G18     53.3           20.5               14.1 +/-   34.68      30.6 +/-   34.68  0.080 / 0.270
G19     220.4          34.1               18.9 +/-   33.25      30.5 +/-   33.25  0.080 / 0.100
G28     9.5            60.4               20.6 +/-   32.54      23.3 +/-   32.54  0.070 / 0.310
G30     128.5          67.9               22.7 +/-   32.71      24.3 +/-   32.71  0.080 / 0.120