PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/23-23:58:00
G01     52.1           26.8                9.9 +/-    2.22      18.6 +/-    2.22  0.130 / 0.200
G06     178.8          22.4               13.0 +/-    1.69      27.0 +/-    1.69  0.090 / 0.120
G07     145.6          15.0               12.9 +/-    2.46      32.1 +/-    2.46  0.020 / 0.020
G11     46.0           19.1                9.5 +/-    2.61      21.5 +/-    2.61  0.020 / 0.020
G13     253.5          31.5                9.1 +/-    3.27      15.5 +/-    3.27  0.050 / 0.050
G15     285.3          16.2               11.1 +/-    1.10      26.7 +/-    1.10  0.040 / 0.040
G17     286.3          77.2               11.0 +/-    0.77      11.2 +/-    0.77  0.040 / 0.050
G19     243.3          57.8               10.1 +/-    1.51      11.7 +/-    1.51  0.040 / 0.050
G28     49.8           53.4               10.6 +/-    1.24      12.8 +/-    1.24  0.220 / 0.320
G30     147.9          40.9               11.2 +/-    1.34      16.0 +/-    1.34  0.150 / 0.310