PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-20:13:10
G01     296.1          38.6                6.5 +/-    2.43       9.7 +/-    2.43  0.090 / 0.090
G03     310.4          13.8                6.5 +/-    2.70      16.6 +/-    2.70  0.090 / 0.090
G10     116.2          32.6                9.6 +/-    1.19      16.0 +/-    1.19  0.020 / 0.020
G11     270.8          27.2                8.0 +/-    2.03      14.8 +/-    2.03  0.020 / 0.020
G14     17.5           61.2                7.0 +/-    0.90       7.8 +/-    0.90  0.090 / 0.130
G22     312.8          34.2                6.0 +/-    0.90       9.6 +/-    0.90  0.110 / 0.120
G25     71.1           18.7                8.7 +/-    1.64      19.9 +/-    1.64  0.040 / 0.060
G31     153.5          75.3                9.5 +/-    0.57       9.8 +/-    0.57  0.040 / 0.040
G32     46.4           45.5                6.6 +/-    0.57       8.8 +/-    0.57  0.030 / 0.040