PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/07-07:57:40
G07     351.6          63.8                2.5 +/-    0.70       2.7 +/-    0.70  0.040 / 0.040
G08     89.0           53.8                4.3 +/-    0.50       5.2 +/-    0.50  0.030 / 0.030
G09     182.2          64.1                3.5 +/-    2.06       3.9 +/-    2.06  0.080 / 0.210
G11     141.1          19.3                3.9 +/-    2.14       8.7 +/-    2.14  0.080 / 0.190
G23     157.2          31.1                4.6 +/-    0.54       7.9 +/-    0.54  0.070 / 0.090
G27     48.3           27.0                2.0 +/-    1.36       3.7 +/-    1.36  0.070 / 0.110
G28     241.8          29.5                5.7 +/-    1.06      10.1 +/-    1.06  0.050 / 0.040
G30     308.0          40.1                2.5 +/-    1.55       3.7 +/-    1.55  0.040 / 0.030