PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/27-12:57:50
G07     2.2            65.5                7.1 +/-    0.94       7.7 +/-    0.94  0.080 / 0.170
G08     82.6           53.0                7.1 +/-    0.84       8.6 +/-    0.84  0.080 / 0.210
G09     183.9          62.9                8.7 +/-    0.56       9.7 +/-    0.56  0.100 / 0.220
G11     138.1          21.2                8.1 +/-    2.42      17.2 +/-    2.42  0.100 / 0.210
G23     157.3          27.4                7.6 +/-    2.27      14.0 +/-    2.27  0.040 / 0.040
G27     46.9           25.8                5.9 +/-    2.61      11.4 +/-    2.61  0.030 / 0.040
G28     244.3          32.6                7.5 +/-    1.43      12.5 +/-    1.43  0.220 / 0.100
G30     312.5          44.8                6.2 +/-    1.02       8.4 +/-    1.02  0.160 / 0.080