PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-21:12:50
G01     66.0           32.2               12.7 +/-    0.69      21.2 +/-    0.69  0.100 / 0.380
G07     139.8          27.7               15.9 +/-    1.38      29.3 +/-    1.38  0.100 / 0.360
G11     51.9           29.0               10.0 +/-    2.10      17.9 +/-    2.10  0.050 / 0.090
G13     269.6          36.7               14.9 +/-    1.32      22.9 +/-    1.32  0.050 / 0.080
G15     298.9          16.0                9.8 +/-    3.22      23.7 +/-    3.22  0.030 / 0.050
G17     238.9          68.0               15.8 +/-    1.02      16.9 +/-    1.02  0.030 / 0.070
G18     46.3           16.4                9.7 +/-    1.90      23.4 +/-    1.90  0.060 / 0.140
G19     227.5          44.8               17.4 +/-    1.07      23.5 +/-    1.07  0.060 / 0.130
G28     27.4           58.1               11.6 +/-    0.72      13.4 +/-    0.72  0.050 / 0.180
G30     139.3          56.1               14.9 +/-    0.95      17.5 +/-    0.95  0.060 / 0.150