PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-13:27:50
G05     48.5           17.6                2.9 +/-    1.45       6.8 +/-    1.45  0.080 / 0.150
G10     235.5          10.8              -13.8 +/-   19.61     -37.8 +/-   19.61  0.070 / 0.160
G13     78.6           37.1                4.2 +/-    0.82       6.4 +/-    0.82  0.130 / 0.250
G15     123.3          51.6                6.7 +/-    0.57       8.3 +/-    0.57  0.120 / 0.290
G18     245.2          43.4                6.3 +/-    3.12       8.7 +/-    3.12  0.040 / 0.040
G20     20.2           70.8                5.5 +/-    0.24       5.8 +/-    0.24  0.050 / 0.030
G21     315.8          49.9                4.0 +/-    0.64       5.0 +/-    0.64  0.160 / 0.350
G25     200.2          11.7                2.8 +/-    3.55       7.4 +/-    3.55  0.140 / 0.360
G26     290.4          19.9                4.0 +/-    0.99       8.8 +/-    0.99  0.060 / 0.070
G29     152.4          69.9                7.4 +/-    0.45       7.8 +/-    0.45  0.050 / 0.070