PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/27-12:42:30
G07     348.0          62.7                4.6 +/-    1.12       5.1 +/-    1.12  0.040 / 0.050
G08     95.0           53.0                6.7 +/-    1.28       8.2 +/-    1.28  0.040 / 0.040
G09     188.9          70.4                5.7 +/-    1.02       6.0 +/-    1.02  0.090 / 0.180
G11     142.8          16.6                6.1 +/-    0.90      14.6 +/-    0.90  0.090 / 0.220
G23     155.7          34.5                7.0 +/-    1.33      11.2 +/-    1.33  0.080 / 0.240
G27     52.3           30.2                5.7 +/-    0.90      10.0 +/-    0.90  0.100 / 0.220
G28     238.6          27.3                6.9 +/-    2.30      12.9 +/-    2.30  0.070 / 0.090
G30     306.6          40.0                4.7 +/-    0.92       6.9 +/-    0.92  0.080 / 0.090