PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-20:57:50
G01     277.1          41.3                7.4 +/-    1.30      10.6 +/-    1.30  0.050 / 0.060
G03     314.9          25.6                7.8 +/-    1.31      15.0 +/-    1.31  0.040 / 0.070
G10     127.0          21.2               11.5 +/-    1.95      24.5 +/-    1.95  0.060 / 0.070
G11     255.5          22.6                5.9 +/-    1.63      12.1 +/-    1.63  0.060 / 0.090
G14     38.1           52.7                8.3 +/-    0.68      10.2 +/-    0.68  0.020 / 0.020
G22     314.5          47.0                6.0 +/-    1.78       7.9 +/-    1.78  0.030 / 0.030
G25     56.4           17.9                7.5 +/-    0.63      17.4 +/-    0.63  0.050 / 0.130
G26     152.2          20.5               13.5 +/-    1.65      29.3 +/-    1.65  0.060 / 0.130
G31     74.0           79.3                8.3 +/-    0.57       8.5 +/-    0.57  0.050 / 0.090
G32     59.8           36.0                7.0 +/-    0.62      11.0 +/-    0.62  0.050 / 0.090