PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-19:43:10
G01     65.5           32.1               14.2 +/-    1.83      23.7 +/-    1.83  0.100 / 0.200
G07     140.0          27.2               16.2 +/-    1.44      30.0 +/-    1.44  0.110 / 0.210
G11     51.2           28.2               12.5 +/-    1.52      22.8 +/-    1.52  0.060 / 0.100
G13     268.8          36.7               17.0 +/-    2.20      26.2 +/-    2.20  0.070 / 0.120
G15     298.9          15.8               12.4 +/-    1.91      30.2 +/-    1.91  0.030 / 0.040
G17     240.7          69.7               17.2 +/-    0.55      18.2 +/-    0.55  0.030 / 0.040
G18     45.9           16.1               11.4 +/-    1.29      27.7 +/-    1.29  0.180 / 0.270
G19     227.9          44.7               18.8 +/-    2.03      25.4 +/-    2.03  0.090 / 0.440
G28     28.0           58.0               16.1 +/-    0.79      18.6 +/-    0.79  0.040 / 0.050
G30     139.8          56.4               16.1 +/-    0.44      19.0 +/-    0.44  0.040 / 0.060