PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-14:27:50
G01     68.3           32.1                7.9 +/-    1.25      13.2 +/-    1.25  0.110 / 0.140
G07     137.7          26.3                8.4 +/-    1.62      16.0 +/-    1.62  0.050 / 0.110
G11     52.5           30.4                7.8 +/-    1.00      13.5 +/-    1.00  0.040 / 0.050
G13     271.7          38.3                9.1 +/-    2.59      13.6 +/-    2.59  0.040 / 0.040
G15     301.3          15.5                5.4 +/-    1.77      13.4 +/-    1.77  0.090 / 0.140
G17     232.5          67.0               10.2 +/-    0.86      11.0 +/-    0.86  0.090 / 0.130
G18     47.2           17.1                6.0 +/-    1.74      14.1 +/-    1.74  0.030 / 0.050
G19     224.2          44.5               10.3 +/-    1.80      14.0 +/-    1.80  0.040 / 0.060
G28     9.6            60.9                8.8 +/-    1.43       9.9 +/-    1.43  0.100 / 0.110
G30     136.9          59.4                9.4 +/-    0.56      10.7 +/-    0.56  0.100 / 0.120