PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-19:27:50
G01     67.5           32.5               11.5 +/-    1.02      19.2 +/-    1.02  0.070 / 0.130
G07     139.1          28.8               13.5 +/-    1.24      24.3 +/-    1.24  0.070 / 0.120
G11     52.3           29.4               10.2 +/-    1.48      18.1 +/-    1.48  0.080 / 0.400
G13     271.0          37.0               15.1 +/-    1.11      23.1 +/-    1.11  0.080 / 0.390
G15     300.5          15.5                9.4 +/-    2.61      23.0 +/-    2.61  0.030 / 0.080
G17     237.3          68.4               14.7 +/-    0.78      15.7 +/-    0.78  0.040 / 0.050
G18     47.1           17.0                9.1 +/-    0.77      21.5 +/-    0.77  0.030 / 0.050
G19     226.4          43.1               16.9 +/-    1.27      23.5 +/-    1.27  0.030 / 0.060
G28     25.0           58.5               11.4 +/-    0.50      13.2 +/-    0.50  0.060 / 0.170
G30     138.3          58.2               12.8 +/-    0.88      14.8 +/-    0.88  0.060 / 0.160