PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-22:42:40
G07     9.6            67.3               10.8 +/-    0.69      11.6 +/-    0.69  0.100 / 0.130
G08     68.8           51.1               10.4 +/-    0.87      12.9 +/-    0.87  0.110 / 0.120
G09     181.5          53.0               14.2 +/-    0.51      17.3 +/-    0.51  0.250 / 0.130
G11     134.8          25.1               17.7 +/-    2.76      34.5 +/-    2.76  0.190 / 0.240
G23     159.3          20.1               14.6 +/-    2.59      32.0 +/-    2.59  0.050 / 0.040
G27     41.1           18.0                8.6 +/-    2.62      19.8 +/-    2.62  0.040 / 0.040
G28     257.0          44.7               10.9 +/-    3.79      14.8 +/-    3.79  0.030 / 0.030
G30     322.3          52.4                9.9 +/-    0.61      12.2 +/-    0.61  0.030 / 0.030