PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-16:27:50
G01     65.3           32.0                9.2 +/-    1.72      15.5 +/-    1.72  0.050 / 0.100
G07     140.0          26.8               11.5 +/-    1.57      21.5 +/-    1.57  0.110 / 0.110
G11     50.5           27.1                7.1 +/-    1.80      13.2 +/-    1.80  0.130 / 0.270
G13     268.3          36.7               11.5 +/-    2.11      17.6 +/-    2.11  0.130 / 0.380
G15     300.1          15.1                7.8 +/-    2.14      19.3 +/-    2.14  0.060 / 0.120
G17     243.2          72.3               11.5 +/-    0.46      12.0 +/-    0.46  0.050 / 0.110
G18     45.4           15.6                8.4 +/-    2.15      20.6 +/-    2.15  0.030 / 0.030
G19     227.8          43.7               12.5 +/-    2.43      17.1 +/-    2.43  0.030 / 0.020
G28     27.8           58.1               11.5 +/-    1.20      13.3 +/-    1.20  0.090 / 0.090
G30     140.2          57.6               11.6 +/-    0.52      13.4 +/-    0.52  0.090 / 0.080