PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-03:43:10
G07     41.0           69.4                4.9 +/-    0.97       5.2 +/-    0.97  0.080 / 0.100
G08     53.9           42.6                4.2 +/-    1.43       5.8 +/-    1.43  0.120 / 0.090
G09     179.1          41.1                7.8 +/-    0.99      11.1 +/-    0.99  0.130 / 0.270
G11     123.2          32.1                7.8 +/-    0.91      13.1 +/-    0.91  0.220 / 0.320
G17     199.4          11.7               -3.2 +/-   16.70      -8.6 +/-   16.70  0.050 / 0.030
G23     160.8          12.1                6.0 +/-    1.50      16.1 +/-    1.50  0.050 / 0.040
G27     37.6           9.6                 2.1 +/-    3.80       5.8 +/-    3.80  0.170 / 0.450
G28     270.9          51.2                4.2 +/-    3.29       5.2 +/-    3.29  0.080 / 0.260
G30     330.8          58.5                3.5 +/-    0.65       4.0 +/-    0.65  0.080 / 0.060