PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-18:58:10
G01     107.1          25.6               15.1 +/-    2.10      29.1 +/-    2.10  0.050 / 0.160
G07     106.6          58.7               15.9 +/-    1.19      18.3 +/-    1.19  0.200 / 0.180
G08     42.3           22.8               10.7 +/-    1.68      22.0 +/-    1.68  0.090 / 0.150
G09     175.1          13.9               14.8 +/-    1.64      37.7 +/-    1.64  0.110 / 0.140
G11     90.4           43.1               17.2 +/-    0.93      23.8 +/-    0.93  0.030 / 0.040
G13     309.8          28.4               12.3 +/-    1.22      22.3 +/-    1.22  0.030 / 0.040
G17     206.9          34.4               17.9 +/-    1.22      28.8 +/-    1.22  0.080 / 0.140
G18     80.8           24.4               16.0 +/-    1.09      31.8 +/-    1.09  0.090 / 0.150
G28     318.5          61.0               13.3 +/-    0.69      15.0 +/-    0.69  0.040 / 0.050
G30     29.5           78.2               15.3 +/-    1.11      15.6 +/-    1.11  0.040 / 0.050