PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-21:12:50
G01     84.3           32.9               13.0 +/-    1.16      21.5 +/-    1.16  0.190 / 0.260
G07     129.8          41.6               15.9 +/-    1.40      22.5 +/-    1.40  0.100 / 0.240
G11     64.8           38.7               12.7 +/-    1.06      18.9 +/-    1.06  0.060 / 0.110
G13     289.0          37.0               16.3 +/-    1.55      25.0 +/-    1.55  0.080 / 0.090
G15     311.7          12.2               13.1 +/-    3.64      34.9 +/-    3.64  0.070 / 0.510
G17     219.3          53.5               18.3 +/-    1.56      22.2 +/-    1.56  0.090 / 0.340
G18     59.3           22.9               10.7 +/-    1.23      21.8 +/-    1.23  0.040 / 0.030
G19     217.2          30.9               19.1 +/-    2.69      32.9 +/-    2.69  0.040 / 0.020
G28     359.8          61.2               13.6 +/-    0.91      15.3 +/-    0.91  0.030 / 0.010
G30     119.4          70.2               15.2 +/-    0.71      16.1 +/-    0.71  0.030 / 0.010