PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-15:42:40
G01     78.2           33.0                9.2 +/-    0.84      15.2 +/-    0.84  0.050 / 0.110
G07     133.3          33.2               11.1 +/-    2.30      18.2 +/-    2.30  0.060 / 0.110
G11     57.3           31.9                7.6 +/-    0.51      12.8 +/-    0.51  0.040 / 0.040
G13     284.9          36.9                9.1 +/-    1.20      13.9 +/-    1.20  0.040 / 0.040
G15     311.2          11.7                7.2 +/-    2.09      19.2 +/-    2.09  0.030 / 0.040
G17     224.1          65.8               11.7 +/-    1.66      12.7 +/-    1.66  0.040 / 0.040
G19     219.8          38.1               12.2 +/-    1.55      18.3 +/-    1.55  0.150 / 0.270
G28     7.8            60.4               10.8 +/-    1.09      12.2 +/-    1.09  0.110 / 0.300
G30     124.5          70.5               12.2 +/-    0.70      12.9 +/-    0.70  0.060 / 0.110