PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-06:57:40
G01     46.7           22.6                3.8 +/-    0.83       7.9 +/-    0.83  0.040 / 0.060
G06     180.6          25.5                8.3 +/-    1.29      16.1 +/-    1.29  0.040 / 0.070
G11     43.9           11.6                3.6 +/-    1.19       9.8 +/-    1.19  0.100 / 0.260
G13     247.3          27.8                8.5 +/-    2.29      15.7 +/-    2.29  0.120 / 0.290
G15     278.8          15.2                8.4 +/-    1.30      20.9 +/-    1.30  0.090 / 0.180
G17     339.6          76.4                7.8 +/-    0.61       8.0 +/-    0.61  0.080 / 0.160
G19     256.7          64.8                8.1 +/-    1.50       8.9 +/-    1.50  0.120 / 0.150
G24     319.0          10.6              -13.6 +/-   26.11     -37.5 +/-   26.11  0.060 / 0.130
G28     60.1           50.5                6.4 +/-    0.71       8.0 +/-    0.71  0.120 / 0.280
G30     151.1          35.2                9.6 +/-    0.39      15.2 +/-    0.39  0.110 / 0.280