PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-15:28:00
G01     68.9           32.7               10.9 +/-    0.93      18.2 +/-    0.93  0.040 / 0.040
G07     138.3          29.6                9.7 +/-    1.03      17.2 +/-    1.03  0.040 / 0.040
G11     52.3           29.2                7.7 +/-    1.23      13.7 +/-    1.23  0.050 / 0.150
G13     272.2          37.4               10.9 +/-    0.84      16.6 +/-    0.84  0.060 / 0.150
G15     303.4          14.3                6.8 +/-    1.14      17.3 +/-    1.14  0.070 / 0.140
G17     236.4          70.4               13.4 +/-    0.65      14.2 +/-    0.65  0.050 / 0.140
G18     47.6           17.2                7.1 +/-    1.24      16.7 +/-    1.24  0.040 / 0.090
G19     225.2          40.5               13.2 +/-    0.88      19.0 +/-    0.88  0.050 / 0.090
G28     22.1           59.0               11.0 +/-    0.27      12.7 +/-    0.27  0.070 / 0.120
G30     137.2          61.2               11.7 +/-    0.55      13.1 +/-    0.55  0.060 / 0.120