PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-16:12:40
G08     269.4          18.0                6.2 +/-    1.72      14.3 +/-    1.72  0.140 / 0.160
G10     59.7           59.0                6.7 +/-    0.67       7.7 +/-    0.67  0.250 / 0.270
G11     313.1          15.3                3.4 +/-    1.64       8.3 +/-    1.64  0.040 / 0.040
G14     265.0          65.1                7.9 +/-    0.78       8.6 +/-    0.78  0.040 / 0.040
G21     153.6          12.8                9.4 +/-    1.65      24.7 +/-    1.65  0.110 / 0.200
G24     40.2           11.1                7.7 +/-    2.03      20.9 +/-    2.03  0.140 / 0.210
G27     231.1          15.8                7.7 +/-    2.72      18.8 +/-    2.72  0.080 / 0.100
G31     178.5          29.9                9.8 +/-    1.22      17.3 +/-    1.22  0.080 / 0.110
G32     338.3          74.2                7.0 +/-    0.34       7.3 +/-    0.34  0.190 / 0.200