PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-09:42:40
G07     343.1          61.0                4.5 +/-    0.50       5.0 +/-    0.50  0.070 / 0.070
G08     89.4           51.6                6.1 +/-    1.28       7.6 +/-    1.28  0.080 / 0.070
G09     181.3          67.5                7.4 +/-    0.39       7.9 +/-    0.39  0.060 / 0.080
G11     141.4          15.3                6.5 +/-    4.01      16.0 +/-    4.01  0.050 / 0.090
G23     157.1          39.7                7.6 +/-    0.75      11.0 +/-    0.75  0.040 / 0.030
G27     51.0           28.7                4.3 +/-    2.33       7.7 +/-    2.33  0.040 / 0.030
G28     240.7          32.8                5.9 +/-    1.18       9.8 +/-    1.18  0.070 / 0.040
G30     303.9          36.1                6.0 +/-    1.56       9.3 +/-    1.56  0.050 / 0.040