PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/31-22:58:00
G01     64.6           31.9               10.1 +/-    0.65      17.0 +/-    0.65  0.050 / 0.100
G07     140.4          26.5               13.4 +/-    0.82      25.4 +/-    0.82  0.050 / 0.090
G11     51.5           28.7                8.0 +/-    1.21      14.4 +/-    1.21  0.050 / 0.070
G13     268.2          36.4               12.3 +/-    1.68      19.0 +/-    1.68  0.040 / 0.070
G15     297.3          16.3               10.5 +/-    1.37      25.3 +/-    1.37  0.030 / 0.040
G17     241.9          69.6               11.9 +/-    0.53      12.6 +/-    0.53  0.030 / 0.040
G18     45.5           15.7                8.8 +/-    1.92      21.4 +/-    1.92  0.090 / 0.260
G19     228.7          46.6               13.3 +/-    0.79      17.6 +/-    0.79  0.080 / 0.270
G28     29.8           57.7                9.0 +/-    0.62      10.4 +/-    0.62  0.050 / 0.140
G30     140.1          53.8               11.5 +/-    0.60      13.8 +/-    0.60  0.050 / 0.160