PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-16:27:50
G03     196.6          38.6               10.9 +/-    1.20      16.2 +/-    1.20  0.190 / 0.090
G07     271.4          25.4                9.8 +/-    1.54      19.0 +/-    1.54  0.140 / 0.110
G08     157.6          10.3              -10.9 +/-   32.33     -30.2 +/-   32.33  0.030 / 0.030
G09     317.5          42.7                8.7 +/-    0.62      12.2 +/-    0.62  0.030 / 0.030
G16     56.1           55.8                9.1 +/-    0.69      10.7 +/-    0.69  0.130 / 0.110
G22     179.9          20.8               10.7 +/-    1.27      23.1 +/-    1.27  0.140 / 0.100
G23     11.1           78.1                8.3 +/-    0.74       8.5 +/-    0.74  0.030 / 0.040
G26     44.0           27.0                5.8 +/-    1.52      10.8 +/-    1.52  0.030 / 0.090
G27     119.6          22.7               10.1 +/-    1.43      20.7 +/-    1.43  0.100 / 0.200