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               14.3 +/-    1.13      30.0 +/-    1.13  0.030 / 0.040
G07     102.4          56.2               11.3 +/-    0.54      13.3 +/-    0.54  0.030 / 0.050
G08     42.6           25.0                8.5 +/-    1.03      16.7 +/-    1.03  0.040 / 0.060
G09     176.6          20.4               13.9 +/-    1.45      30.3 +/-    1.45  0.050 / 0.060
G11     95.6           42.5               13.3 +/-    0.64      18.6 +/-    0.64  0.060 / 0.090
G13     313.4          25.5               10.8 +/-    1.62      20.9 +/-    1.62  0.050 / 0.110
G17     202.9          32.0               13.7 +/-    1.27      23.1 +/-    1.27  0.080 / 0.200
G18     84.6           22.7               10.1 +/-    1.07      20.8 +/-    1.07  0.100 / 0.200
G28     297.9          57.2               11.7 +/-    0.99      13.7 +/-    0.99  0.080 / 0.200
G30     9.1            75.4               11.6 +/-    0.80      12.0 +/-    0.80  0.080 / 0.200