PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/09-12:58:10
G07     343.9          61.6                6.6 +/-    0.78       7.4 +/-    0.78  0.080 / 0.080
G08     86.4           52.6                7.6 +/-    0.72       9.3 +/-    0.72  0.080 / 0.080
G09     181.9          64.7                8.4 +/-    1.49       9.2 +/-    1.49  0.050 / 0.090
G11     140.8          17.9                6.8 +/-    1.75      15.7 +/-    1.75  0.050 / 0.070
G23     157.1          32.9                7.9 +/-    1.90      13.1 +/-    1.90  0.090 / 0.250
G27     49.1           27.7                5.4 +/-    0.54       9.9 +/-    0.54  0.100 / 0.310
G28     243.2          34.9                7.8 +/-    2.27      12.4 +/-    2.27  0.040 / 0.050
G30     307.2          39.3                5.6 +/-    1.03       8.2 +/-    1.03  0.040 / 0.050