PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-19:43:10
G01     76.7           33.3               12.0 +/-    1.27      19.7 +/-    1.27  0.090 / 0.180
G07     134.4          36.0               13.0 +/-    0.56      20.3 +/-    0.56  0.120 / 0.210
G11     58.2           34.8               12.7 +/-    1.26      20.2 +/-    1.26  0.040 / 0.030
G13     281.0          37.7               11.2 +/-    1.27      17.0 +/-    1.27  0.030 / 0.020
G15     307.1          13.9                8.4 +/-    3.09      21.5 +/-    3.09  0.050 / 0.070
G17     225.5          60.9               12.8 +/-    1.44      14.4 +/-    1.44  0.040 / 0.070
G18     53.5           20.7               12.0 +/-    5.27      26.0 +/-    5.27  0.060 / 0.040
G19     220.8          36.1               13.7 +/-    1.87      21.4 +/-    1.87  0.050 / 0.040
G28     11.2           60.3               13.4 +/-    1.57      15.2 +/-    1.57  0.120 / 0.310
G30     129.5          65.5               14.2 +/-    0.70      15.4 +/-    0.70  0.340 / 0.250