PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-23:12:40
G01     319.6          15.8                8.2 +/-    1.61      20.1 +/-    1.61  0.280 / 0.370
G08     258.6          14.4               15.9 +/-    1.43      40.0 +/-    1.43  0.220 / 0.380
G10     74.8           55.3               10.4 +/-    0.48      12.3 +/-    0.48  0.140 / 0.370
G11     304.8          22.6                9.2 +/-    1.52      19.1 +/-    1.52  0.130 / 0.290
G14     292.1          70.7               11.8 +/-    0.72      12.4 +/-    0.72  0.040 / 0.040
G18     99.7           30.4               12.8 +/-    0.66      22.2 +/-    0.66  0.050 / 0.060
G27     224.5          9.9                18.8 +/-   19.84      52.5 +/-   19.84  0.080 / 0.080
G31     180.0          35.7               17.0 +/-    1.57      26.6 +/-    1.57  0.050 / 0.080
G32     353.8          70.5               10.6 +/-    0.56      11.1 +/-    0.56  0.030 / 0.030