PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/03-11:57:40
G01     76.5           33.2                1.8 +/-    1.93       2.9 +/-    1.93  0.030 / 0.030
G07     134.4          35.1                4.1 +/-    1.02       6.6 +/-    1.02  0.040 / 0.020
G11     56.2           32.6                1.4 +/-    0.78       2.4 +/-    0.78  0.080 / 0.080
G13     280.2          38.1                3.6 +/-    2.18       5.4 +/-    2.18  0.090 / 0.080
G15     310.1          11.7                1.8 +/-    5.36       4.8 +/-    5.36  0.060 / 0.100
G17     225.9          67.2                5.7 +/-    0.89       6.1 +/-    0.89  0.050 / 0.090
G18     52.3           19.8                1.3 +/-    4.92       2.9 +/-    4.92  0.280 / 0.410
G19     220.7          33.7                4.4 +/-    1.52       7.2 +/-    1.52  0.180 / 0.300
G28     10.2           60.4                2.9 +/-    1.92       3.3 +/-    1.92  0.040 / 0.080
G30     129.1          68.7                4.7 +/-    0.75       5.0 +/-    0.75  0.050 / 0.080