PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-19:27:50
G01     250.7          35.0               12.5 +/-    1.20      19.8 +/-    1.20  0.030 / 0.050
G03     315.8          45.8               10.5 +/-    0.90      13.9 +/-    0.90  0.030 / 0.060
G11     238.6          12.6               13.6 +/-    3.15      35.7 +/-    3.15  0.070 / 0.090
G14     60.2           41.1                9.7 +/-    1.20      13.8 +/-    1.20  0.060 / 0.110
G22     303.9          66.9               10.6 +/-    1.56      11.5 +/-    1.56  0.030 / 0.040
G23     287.1          19.9               12.0 +/-    2.03      26.4 +/-    2.03  0.030 / 0.050
G25     39.8           10.2                7.9 +/-    2.11      22.0 +/-    2.11  0.120 / 0.270
G26     136.3          38.3               12.6 +/-    1.16      18.9 +/-    1.16  0.100 / 0.300
G31     40.7           58.4                8.9 +/-    0.75      10.3 +/-    0.75  0.040 / 0.080
G32     77.8           22.5                8.3 +/-    0.64      17.1 +/-    0.64  0.040 / 0.070