PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-11:27:50
G01     74.8           33.3                1.5 +/-    0.97       2.5 +/-    0.97  0.040 / 0.030
G07     135.4          33.4                6.9 +/-    1.12      11.3 +/-    1.12  0.030 / 0.030
G11     55.3           32.1                2.8 +/-    1.40       4.7 +/-    1.40  0.060 / 0.080
G13     278.4          38.1                6.8 +/-    2.27      10.2 +/-    2.27  0.150 / 0.200
G15     310.1          11.4                2.5 +/-    1.68       6.8 +/-    1.68  0.050 / 0.080
G17     228.1          67.6                7.7 +/-    0.79       8.2 +/-    0.79  0.060 / 0.080
G18     50.7           19.0                2.5 +/-    2.30       5.6 +/-    2.30  0.050 / 0.070
G19     221.7          34.3                7.7 +/-    2.01      12.4 +/-    2.01  0.050 / 0.080
G28     11.9           60.3                5.1 +/-    1.40       5.7 +/-    1.40  0.160 / 0.170
G30     131.5          66.8                6.1 +/-    0.92       6.6 +/-    0.92  0.220 / 0.200