PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/19-11:57:50
G02     201.6          23.6                7.7 +/-    2.27      15.5 +/-    2.27  0.130 / 0.130
G06     165.8          59.9                7.4 +/-    0.38       8.4 +/-    0.38  0.080 / 0.120
G17     24.6           57.6                5.2 +/-    0.91       6.1 +/-    0.91  0.040 / 0.040
G19     343.9          69.6                4.8 +/-    0.80       5.0 +/-    0.80  0.030 / 0.040
G24     307.0          31.7                5.1 +/-    2.23       8.7 +/-    2.23  0.050 / 0.030
G28     88.3           42.9                5.9 +/-    0.50       8.2 +/-    0.50  0.040 / 0.040
G30     158.1          11.5                5.1 +/-    2.49      13.7 +/-    2.49  0.040 / 0.040