PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-06:27:50
G01     273.6          41.3                8.6 +/-    2.30      12.2 +/-    2.30  0.050 / 0.050
G03     315.4          27.0                5.1 +/-    3.09       9.5 +/-    3.09  0.040 / 0.050
G10     128.5          18.4                6.9 +/-    1.65      15.9 +/-    1.65  0.040 / 0.060
G11     251.9          21.0                7.6 +/-    2.97      16.4 +/-    2.97  0.050 / 0.070
G14     38.3           52.9                7.8 +/-    1.90       9.5 +/-    1.90  0.050 / 0.060
G18     236.4          40.5                9.7 +/-    1.51      13.9 +/-    1.51  0.050 / 0.040
G22     314.4          50.6                6.5 +/-    1.10       8.1 +/-    1.10  0.160 / 0.360
G25     53.9           17.0                3.6 +/-    2.14       8.4 +/-    2.14  0.140 / 0.410
G31     57.5           73.2                8.8 +/-    0.26       9.1 +/-    0.26  0.170 / 0.190
G32     63.5           32.1                5.5 +/-    1.88       9.3 +/-    1.88  0.260 / 0.220