PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-17:43:10
G08     294.3          22.6                8.0 +/-    2.27      16.5 +/-    2.27  0.110 / 0.100
G10     4.5            63.0                6.2 +/-    0.80       6.9 +/-    0.80  0.090 / 0.090
G14     229.6          45.8                7.7 +/-    1.39      10.3 +/-    1.39  0.070 / 0.140
G18     64.6           50.1                6.8 +/-    0.97       8.5 +/-    0.97  0.080 / 0.140
G21     145.0          35.8                8.1 +/-    1.05      12.6 +/-    1.05  0.090 / 0.080
G24     57.6           26.7                6.6 +/-    1.46      12.5 +/-    1.46  0.090 / 0.090
G27     253.6          31.8                6.0 +/-    2.48      10.2 +/-    2.48  0.030 / 0.020
G32     244.5          66.5                7.1 +/-    0.44       7.6 +/-    0.44  0.030 / 0.020