PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/26-10:42:40
G07     344.9          62.0                4.6 +/-    0.56       5.1 +/-    0.56  0.140 / 0.310
G08     98.6           53.2                5.2 +/-    0.73       6.4 +/-    0.73  0.090 / 0.180
G09     188.2          70.7                7.4 +/-    0.44       7.8 +/-    0.44  0.040 / 0.030
G11     143.6          16.2                7.8 +/-    3.13      19.0 +/-    3.13  0.040 / 0.030
G23     155.2          34.2                6.6 +/-    1.10      10.7 +/-    1.10  0.090 / 0.110
G27     52.6           30.3                4.3 +/-    1.66       7.4 +/-    1.66  0.090 / 0.080
G28     238.0          26.4                6.1 +/-    2.80      11.6 +/-    2.80  0.030 / 0.030
G30     305.2          38.3                5.4 +/-    1.87       8.0 +/-    1.87  0.030 / 0.030