PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/22-20:28:00
G07     345.7          62.1               12.4 +/-    0.44      13.9 +/-    0.44  0.050 / 0.050
G08     90.3           54.3               12.9 +/-    0.69      15.5 +/-    0.69  0.050 / 0.050
G09     185.6          65.4               14.5 +/-    0.89      15.8 +/-    0.89  0.050 / 0.140
G11     142.4          17.8               14.2 +/-    1.47      33.0 +/-    1.47  0.070 / 0.130
G23     156.9          30.1               13.1 +/-    1.72      22.8 +/-    1.72  0.040 / 0.050
G27     47.6           26.2               11.4 +/-    1.14      21.6 +/-    1.14  0.030 / 0.050
G28     244.9          36.6               15.1 +/-    0.86      23.4 +/-    0.86  0.060 / 0.130
G30     310.8          43.2               11.3 +/-    1.03      15.6 +/-    1.03  0.050 / 0.130