PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-20:27:50
G01     52.6           27.1               10.7 +/-    1.31      19.9 +/-    1.31  0.120 / 0.380
G06     177.8          22.9               16.0 +/-    0.63      32.9 +/-    0.63  0.110 / 0.430
G07     145.4          15.5               15.1 +/-    2.23      37.2 +/-    2.23  0.050 / 0.060
G11     45.7           18.3                9.3 +/-    1.08      21.2 +/-    1.08  0.040 / 0.060
G13     253.8          31.9               13.7 +/-    2.21      23.1 +/-    2.21  0.040 / 0.060
G15     286.8          16.0                9.9 +/-    2.30      24.2 +/-    2.30  0.030 / 0.060
G17     283.2          77.1               13.9 +/-    0.70      14.2 +/-    0.70  0.080 / 0.290
G19     241.8          56.1               13.8 +/-    0.65      16.3 +/-    0.65  0.070 / 0.220
G28     48.5           53.8               12.6 +/-    0.69      15.2 +/-    0.69  0.090 / 0.150
G30     148.1          43.4               14.5 +/-    1.61      19.9 +/-    1.61  0.160 / 0.160