PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-17:57:50
G01     123.9          13.5               14.0 +/-    1.86      36.1 +/-    1.86  0.030 / 0.030
G07     76.6           64.4               11.7 +/-    0.51      12.8 +/-    0.51  0.030 / 0.030
G08     48.0           36.5                9.9 +/-    1.35      15.4 +/-    1.35  0.030 / 0.030
G09     178.5          34.0               12.7 +/-    0.83      20.6 +/-    0.83  0.030 / 0.030
G11     113.2          37.8               14.4 +/-    0.81      21.7 +/-    0.81  0.120 / 0.080
G13     319.8          15.1                9.8 +/-    3.06      24.4 +/-    3.06  0.080 / 0.100
G17     199.8          18.3               12.6 +/-    2.22      29.0 +/-    2.22  0.110 / 0.180
G18     98.5           18.1               11.9 +/-    1.20      27.4 +/-    1.20  0.100 / 0.210
G28     275.9          51.1               13.6 +/-    3.03      16.9 +/-    3.03  0.110 / 0.370
G30     340.0          65.0               11.3 +/-    0.72      12.3 +/-    0.72  0.150 / 0.390