PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/27-06:58:00
G07     12.4           67.6                3.5 +/-    0.46       3.8 +/-    0.46  0.050 / 0.070
G08     70.1           51.0                6.2 +/-    0.28       7.7 +/-    0.28  0.060 / 0.070
G09     178.6          52.3                6.8 +/-    1.25       8.3 +/-    1.25  0.040 / 0.040
G11     134.4          26.1                6.0 +/-    1.01      11.4 +/-    1.01  0.030 / 0.030
G23     159.3          21.7                5.8 +/-    1.82      12.2 +/-    1.82  0.110 / 0.140
G27     42.1           19.8                2.8 +/-    1.19       6.2 +/-    1.19  0.110 / 0.160
G28     250.7          36.6                5.6 +/-    0.71       8.7 +/-    0.71  0.060 / 0.150
G30     315.6          46.7                2.5 +/-    0.85       3.2 +/-    0.85  0.070 / 0.170