PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-15:12:50
G07     325.2          56.0               10.5 +/-    0.82      12.4 +/-    0.82  0.270 / 0.480
G08     117.2          46.6               13.6 +/-    0.73      18.0 +/-    0.73  0.210 / 0.450
G09     255.7          82.7               13.5 +/-    0.48      13.6 +/-    0.48  0.040 / 0.040
G16     43.4           18.6                7.2 +/-    2.12      16.4 +/-    2.12  0.030 / 0.040
G23     150.1          53.3               13.2 +/-    0.69      16.1 +/-    0.69  0.160 / 0.200
G27     69.6           36.9               10.8 +/-    1.72      16.6 +/-    1.72  0.060 / 0.050
G28     228.2          15.4               11.7 +/-   17.66      28.7 +/-   17.66  0.030 / 0.020
G30     294.0          29.8               10.0 +/-    3.26      17.6 +/-    3.26  0.030 / 0.020