PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-18:27:50
G01     112.2          21.9               12.4 +/-    1.52      26.0 +/-    1.52  0.030 / 0.030
G07     102.4          56.2               12.8 +/-    0.84      15.1 +/-    0.84  0.030 / 0.020
G08     42.6           25.0               10.4 +/-    1.72      20.4 +/-    1.72  0.040 / 0.040
G09     176.6          20.4               12.4 +/-    1.08      26.9 +/-    1.08  0.040 / 0.040
G11     95.6           42.5               13.7 +/-    0.57      19.2 +/-    0.57  0.050 / 0.060
G13     313.4          25.5               10.3 +/-    2.30      19.9 +/-    2.30  0.040 / 0.060
G17     202.9          32.0               13.3 +/-    1.03      22.4 +/-    1.03  0.080 / 0.160
G18     84.6           22.7               11.5 +/-    3.68      23.8 +/-    3.68  0.090 / 0.160
G28     297.9          57.2               11.5 +/-    0.88      13.4 +/-    0.88  0.110 / 0.260
G30     9.1            75.4               12.6 +/-    0.66      12.9 +/-    0.66  0.140 / 0.340