PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/26-11:43:00
G07     52.5           68.4                5.6 +/-    1.03       6.0 +/-    1.03  0.070 / 0.110
G08     55.5           45.0                3.8 +/-    1.57       5.1 +/-    1.57  0.090 / 0.120
G09     178.8          40.5                7.1 +/-    0.90      10.2 +/-    0.90  0.030 / 0.030
G11     122.0          34.2                7.4 +/-    1.02      11.8 +/-    1.02  0.030 / 0.040
G18     105.8          15.0                4.0 +/-    1.95      10.0 +/-    1.95  0.120 / 0.260
G27     37.8           10.5                3.5 +/-    2.66       9.7 +/-    2.66  0.070 / 0.290
G28     265.3          45.9                7.4 +/-    4.78       9.9 +/-    4.78  0.070 / 0.070
G30     329.9          58.7                4.4 +/-    0.36       5.1 +/-    0.36  0.050 / 0.060