PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/12-07:27:40
G07     343.2          61.6                4.3 +/-    0.61       4.8 +/-    0.61  0.030 / 0.040
G08     96.6           53.2                6.6 +/-    0.38       8.0 +/-    0.38  0.040 / 0.040
G09     184.4          68.8                5.2 +/-    0.49       5.6 +/-    0.49  0.130 / 0.090
G11     144.1          16.4                6.4 +/-    2.02      15.4 +/-    2.02  0.150 / 0.090
G23     156.2          35.8              -10.6 +/-    0.93     -16.6 +/-    0.93  0.030 / 0.020
G27     51.8           29.6                4.5 +/-    1.44       8.0 +/-    1.44  0.030 / 0.030
G28     238.3          26.1                6.1 +/-    2.26      11.7 +/-    2.26  0.050 / 0.040
G30     304.4          36.9                5.3 +/-    1.08       8.1 +/-    1.08  0.040 / 0.040